• भारत सरकार Government of India
  • मानव संसाधन विकास मंत्रालय Ministry of Human Resource Development
  • भारतीय प्रौद्योगिकी संस्थान खड़गपुर Indian Institute of Technology Kharagpur
(39) | Imaging the first billion years of the universe with next-generation telescopes (Submitted On 30-AUG-2020)
  • (COPI) - Dr. Erik Zackrisson UPPSALA UNIVERSITY
    From Date: 18-01-2020 | To Date : 01-02-2020
    No Of Participants: 38
    Contact Hrs : 30
    Total Contact Hrs : 30
    Visiting Institute
    Indian Institute of Technology Indore
    Course
    Observing The First Billion Years of the Universe Using Next Generation Telescopes
    Outcome of The Visit

    1. Taught courses on 'First Sources of Light and How to Observe them' and 'Searching for life in outer space' during an international school titled 'Observing The First Billion Years of the Universe Using Next Generation Telescopes' (during 27-31 January 2020) organized under this SPARC project at IIT Indore. Event website: http://www.iiti.ac.in/people/~firstbillion/

    2. Participated, chaired a session and gave an invited talk in the international conference titled 'Observing The First Billion Years of the Universe Using Next Generation Telescopes' (during 20-24 January 2020) organized under this SPARC project at IIT Indore.
    Event website: http://www.iiti.ac.in/people/~firstbillion/
    3. Participated in the discussion and collaboration to build a Virtual Reality Astronomy Observatory for teaching masters students and research.
    4. Participated in the scientific collaboration which has resulted in an journal article titled 'Bubble mapping with the Square Kilometer Array -- I. Detecting galaxies with Euclid, JWST, WFIRST and ELT within ionized bubbles in the intergalactic medium at z>6' published in Monthly Notices of the Royal Astronomical Society, DOI: 10.1093/mnras/staa098

    Participants

    Nabanita Das,"Presidency University, Kolkata."
    ,Ivelin Georgiev,"Stockholm University, Astronomy Department"
    ,Arvind Kumar Mishra,"Physical Research Laboratory, Ahmedabad, India"
    ,Harman Deep Kaur,"Scuola Normale Superiore di Pisa, Italy"
    ,Ankita Bera,Presidency University
    ,Swati Satyawan Gavas,IISER Mohali
    ,Kirill Makan,University of Potsdam
    ,Archita Bhattacharyya,"Indian Statistical Institute, Kolkata"
    ,ARITRA KUNDU,"PRESIDENCY UNIVERSITY, KOLKATA"
    ,Antara Dey,"Indian Statistical Institute, Kolkata"
    ,KM NITU RAI,IPHD(IISER TVM)
    ,Zahra Kader,University of KwaZulu-Natal
    ,Viraj Nistane,University of Geneva
    ,Ian Hothi,Imperial
    ,Adélie Gorce,Imperial College London / IAS Orsay
    ,Chandrachud Bijay Vaswar Dash,"Birla Institute Of Technology and Science,Pilani"
    ,Aman Chokshi,University of Melbourne
    ,Ajith S,Indian Institute of Astrophysics
    ,Chandra Shekhar Murmu,IIT Indore
    ,Dara Storer,University of Washington
    ,Anchal Saxena,Indian Institute of Technology Indore
    ,Himanshu Tiwari,Indian Institute of Technology Indore
    ,Samanvith S.,Indian Institute of Technology Indore
    ,Dhaneshwar Dalian,University of KwaZulu-Natal
    ,Warren Naidoo,University of KwaZulu-Natal
    ,Arnab Chakraborty,"Indian Institute of Technology, Indore (IIT Indore)"
    ,Abinash Kumar Shaw,Indian Institute of Technology Kharagpur
    ,Aishrila Mazumder,Indian Institute of Technology Indore
    ,Mohd Kamran,IIT INDORE
    ,Madhurima Choudhury,IIT Indore
    ,Majidul Rahman,IIT INDORE
    ,Ramij Raja ,IIT INDORE
    ,Sumanjit Chakraborty,IIT INDORE
    ,Akriti Sinha ,IIT INDORE
    ,Parul Janagal ,IIT INDORE
    ,Unnati Kashyap,IIT INDORE
    ,Sarvesh Mangla,IIT INDORE
    ,Anshuman Tiwari,IIT INDORE

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  • International Conference on Observing The First Billion Years of the Universe Using Next Generation Telescopes
    From Date : 20-01-2020 | To Date : 24-01-2020
    No of Participants : 81
    View more
    Workshop Overview

    During the first billion years of its life, the Universe has gone through one of its most remarkable phase changes, known as the Cosmic Dawn and the Epoch of Reionization (CD-EoR). This era constitutes a crucial missing chapter in the history of our Universe. This is the period when the very first sources of light were formed and where these sources heated and “re”-ionized the cold inter-galactic medium (IGM), consisting of mostly neutral hydrogen (HI) and helium (HeI). There are many fundamental questions related to this era that are still unresolved, including its exact timing and duration, the properties of these first light sources, etc. Answers to these questions will also enable us to understand how the present day cosmic structures have come into place from the tiny fluctuations in the matter and radiation of the early universe. This is why this era is also considered as one of the last frontiers of observational cosmology.

    Radio interferometric observations of the redshifted 21-cm signal, coming from the HI of this era, promise to resolve many of these puzzles. The present time is particularly exciting for this rapidly growing field, as several radio telescopes, such as the GMRT, LOFAR, MWA, PAPER, HERA, HIRAX, Tianlai, CHIME, OWFA etc., are competing to detect this signal from the CD-EoR as well as from the post-EoR phase of the Universe. The upcoming SKA, owing to its superior sensitivity, is expected to provide, for the first time, tomographic images of the HI distribution at different cosmic times. These images will enable a giant leap in our understanding of these mysterious chapters in cosmic history. Additionally, experiments such as EDGES, LEDA, SARAS etc. are trying to measure the variation of the mean 21-cm signal with cosmic time. Further, an upcoming set of telescopes in other wavelengths (e.g. Euclid, Athena, WFIRST, JWST, ELT, TMT, SPHEREx, TIME, CONCERTO etc.) will have the capability to map and characterize the sources that might have reionized the Universe. These multi-wavelength future experiments promise to provide us a comprehensive picture of the CD-EoR through direct observations of the luminous sources as well as of their impact on the IGM at this period.

    To find innovative solutions to the various observational and technical obstacles faced by these new generation experiments and to analyze and interpret the unprecedented amount of observational data generated by them, we gathering experts in this field from around the globe at IIT Indore during this international conference (20-24 January 2020) that will focus on the progress and present status of observations, modelling, and statistical inference tools of the CD-EoR and post-EoR epoch.

    Participants

    ,Kavilan Moodley,"University of KwaZulu-Natal, South Africa"
    ,Raul Alberto Monsalve Jara,"McGill University, Canada"
    ,Nicholas Steven Kern (remote),"University of California, Berkeley, USA"
    ,Girish Kulkarni,"TIFR, India"
    ,Jeffrey Franklin Wagg,"Square Kilometre Array Organization, UK"
    ,Samir Choudhuri,"Queen Mary University of London, UK"
    ,Raghunath Ghara,"Technion, Israel"
    ,TAKUYA HASHIMOTO,"Waseda University, Japan"
    ,Sambit Kumar Giri,"University of Zurich, Switzerland"
    ,Nithyanandan Thyagarajan,"NRAO, USA"
    ,Benjamin McKinley,"Curtin University, Australia"
    ,Vibor Jelic,"Ruder Boskovic Institute, Croatia"
    ,Anastasia Fialkov,"Cambridge University, UK"
    ,Suman Chatterjee,"IIT Kharagpur, India"
    ,Léon Koopmans,"Kapteyn Astronomical Institute, University of Groningen, Netherlands"
    ,Anne Hutter,"Kapteyn Astronomical Institute, University of Groningen, Netherlands"
    ,Yidong Xu,"National Astronomical Observatories, CAS, China"
    ,David Rapetti (remote),"NASA Ames-USRA/University of Colorado Boulder, USA"
    ,Sangeeta Malhotra,"NASA Goddard Space Flight Center, USA"
    ,Oleg Smirnov,"Rhodes University, South Africa"
    ,Jishnu Nambissan T (remote),"Raman Research Institute, India"
    ,Swara Ravindranath,"Space Telescope Science Institute, USA"
    ,Suvodip Mukherjee (remote),"Institut Lagrange de Paris, France"
    ,Yashwant Gupta,"NCRA-TIFR, India"
    ,Yin-Zhe Ma,"University of KwaZulu-Natal, South Africa"
    ,Abinash Kumar Shaw,"Indian Institute of Technology Kharagpur, India"
    ,Yuxiang Qin,"Scuola Normale Superiore, Italy"
    ,Atrideb Chatterjee,"National Centre for Radio Astrophysics, India"
    ,Arnab Chakraborty,"Indian Institute of Technology, Indore, India"
    ,Adélie Gorce,"Imperial College London, UK / IAS Orsay, France"
    ,Jonathan Chardin,"Observatoire Astronomique de Strasbourg, France"
    ,Rajesh Mondal,"University of Sussex, UK"
    ,Michele Bianco,"University of Sussex, UK"
    ,Prasanta Kumar Das,"BITS Pilani K K Birla Goa Campus, India"
    ,Akanksha Kapahtia,"Indian Institute of Astrophysics, India"
    ,Sandeep Rana,"NISER, Bhubaneswar, India"
    ,Bharat Kumar Gehlot,"Arizona State University, USA"
    ,Ilian T Iliev (remote),"University of Sussex, UK"
    ,Kirill Makan,"University of Potsdam, Germany"
    ,Subinoy das,"IIA, India"
    ,Jais Kumar,"IIT (BHU) Varanasi, India"
    ,Ankita Bera,"Presidency University, India"
    ,Akash Kumar Patwa,"Raman Research Institute, Bengaluru, India"
    ,Moupiya Maji,"University of Geneva, Switzerland"
    ,Srijita Pal,"IIT, Kharagpur, India"
    ,Keri Dixon,"New York University Abu Dhabi, UAE"
    ,Madhurima Choudhury,"IIT Indore, India"
    ,PRASUN DUTTA,"IIT (BHU), Varanasi, India"
    ,T R Seshadri,"Delhi University, India"
    ,Aman Chokshi,"University of Melbourne, Australia"
    ,Ian Hothi,"Imperial College London, UK"
    ,ARITRA KUNDU,"PRESIDENCY UNIVERSITY, KOLKATA, India"
    ,Janakee Raste,"Tata Institute of Fundamental Research, Mumbai, India"
    ,Aishrila Mazumder,"Indian Institute of Technology Indore, India"
    ,Aswin P Vijayan,"University of Sussex, UK"
    ,Urvashi,"IIT(BHU), India"
    ,Harman Deep Kaur,"Scuola Normale Superiore di Pisa, Italy"
    ,Mohd Kamran,"IIT INDORE, India"
    ,Arvind Kumar Mishra,"Physical Research Laboratory, Ahmedabad, India"
    ,Anchal Saxena,"Indian Institute of Technology Indore, India"
    ,Dara Storer,"University of Washington, USA"
    ,Dhaneshwar Dalian,"University of KwaZulu-Natal, South Africa"
    ,Zahra Kader,"University of KwaZulu-Natal, South Africa"
    ,Warren Naidoo,"University of KwaZulu-Natal, South Africa"
    ,Viraj Nistane,"University of Geneva, Switzerland"
    ,Erik Zackrisson,"Uppsala University, Sweden"
    ,Tirthankar Roy Choudhury,"NCRA-TIFR, India"
    ,Kanan K. Datta,"Presidency University, India"
    ,Suman Majumdar,"IIT INDORE, India"
    ,Abhirup Datta,"IIT INDORE, India"
    ,Himanshu Tiwari,"IIT INDORE, India"
    ,Samanvith A,"IIT INDORE, India"
    ,Parul Janagal,"IIT INDORE, India"
    ,Sarvesh mangla,"IIT INDORE, India"
    ,Ramij Raja,"IIT INDORE, India"
    ,Majidul Rahman,"IIT INDORE, India"
    ,Unnati Kashyap,"IIT INDORE, India"
    ,Sanmoy Bandyopadhyay,"IIT INDORE, India"
    ,Chandra Shekhar Murmu,"IIT INDORE, India"
    ,Sumanjit Chakraborty,"IIT INDORE, India"
    ,Akriti Sinha,"IIT INDORE, India"

  • International School on Observing The First Billion Years of the Universe Using Next Generation Telescopes
    From Date : 27-01-2020 | To Date : 31-01-2020
    No of Participants : 40
    View more
    Workshop Overview

    During the first billion years of its life, the Universe has gone through one of its most remarkable phase changes, known as the Cosmic Dawn and the Epoch of Reionization (CD-EoR). This era constitutes a crucial missing chapter in the history of our Universe. This is the period when the very first sources of light were formed and where these sources heated and “re”-ionized the cold inter-galactic medium (IGM), consisting of mostly neutral hydrogen (HI) and helium (HeI). There are many fundamental questions related to this era that are still unresolved, including its exact timing and duration, the properties of these first light sources, etc. Answers to these questions will also enable us to understand how the present day cosmic structures have come into place from the tiny fluctuations in the matter and radiation of the early universe. This is why this era is also considered as one of the last frontiers of observational cosmology.

    Radio interferometric observations of the redshifted 21-cm signal, coming from the HI of this era, promise to resolve many of these puzzles. The present time is particularly exciting for this rapidly growing field, as several radio telescopes, such as the GMRT, LOFAR, MWA, PAPER, HERA, HIRAX, Tianlai, CHIME, OWFA etc., are competing to detect this signal from the CD-EoR as well as from the post-EoR phase of the Universe. The upcoming SKA, owing to its superior sensitivity, is expected to provide, for the first time, tomographic images of the HI distribution at different cosmic times. These images will enable a giant leap in our understanding of these mysterious chapters in the cosmic history. Additionally, experiments such as EDGES, LEDA, SARAS etc. are trying to measure the variation of the mean 21-cm signal with cosmic time. Further, an upcoming set of telescopes in other wavelengths (e.g. Euclid, Athena, WFIRST, JWST, ELT, TMT, SPHEREx, TIME, CONCERTO etc.) will have the capability to map and characterize the sources that might have reionized the Universe. These multi-wavelength future experiments promise to provide us a comprehensive picture of the CD-EoR through direct observations of the luminous sources as well as of their impact on the IGM at this period.

    To find innovative solutions to the various observational and technical obstacles faced by these new generation experiments and to analyze and interpret the unprecedented amount of observational data generated by them, we will need a large pool of highly skilled and motivated researchers. With this goal in mind, we are conducting a five-days-long school (27-31 January 2020) for Masters and PhD students, Postdocs, and Early Career Researchers who wish to conduct active research in this vibrant field. This school will consist of a series of lectures, hands-on demonstrations, and discussions by leading scientists on different methods of analytical modelling, simulations, observations, data reduction, and statistical inference for multi-wavelength observations of this early phase of our Universe. This will be part of the ongoing effort of the SKA-India consortium, which has been conducting such schools annually since 2016.

    Participants

    Nabanita Das,"Presidency University, Kolkata, India"
    Ivelin Georgiev,"Stockholm University, Astronomy Department, Sweden"
    Arvind Kumar Mishra,"Physical Research Laboratory, Ahmedabad, India"
    Harman Deep Kaur,"Scuola Normale Superiore di Pisa, Italy"
    Ankita Bera,"Presidency University, India"
    Swati Satyawan Gavas,"IISER Mohali, India"
    Kirill Makan,"University of Potsdam, Germany"
    Archita Bhattacharyya,"Indian Statistical Institute, Kolkata, India"
    ARITRA KUNDU,"PRESIDENCY UNIVERSITY, KOLKATA, India"
    Antara Dey,"Indian Statistical Institute, Kolkata, India"
    KM NITU RAI,"IISER TVM, India"
    Zahra Kader,"University of KwaZulu-Natal, South Africa"
    Viraj Nistane,"University of Geneva, Switzerland"
    Ian Hothi,"Imperial College London, UK"
    Adélie Gorce,"Imperial College London, UK / IAS Orsay, France"
    Chandrachud Bijay Vaswar Dash,"Birla Institute Of Technology and Science,Pilani, India"
    Aman Chokshi,"University of Melbourne, Australia"
    Ajith S,"Indian Institute of Astrophysics, India"
    Chandra Shekhar Murmu,"IIT Indore, India"
    Dara Storer,"University of Washington, USA"
    Anchal Saxena,"Indian Institute of Technology Indore, India"
    Himanshu Tiwari,"Indian Institute of Technology Indore, India"
    Samanvith S.,"Indian Institute of Technology Indore, India"
    Warren Naidoo,"University of KwaZulu-Natal, South Africa"
    Dhaneshwar Dalian,"University of KwaZulu-Natal, South Africa"
    Nirupam Roy,"Indian Institute of Science, India"
    Garrelt Mellema,"Stockholm University, Sweden"
    Erik Zackrisson,"Uppsala University, Sweden"
    Kanan K. Datta,"Presidency University, India"
    PRASUN DUTTA,"IIT (BHU), Varanasi, India"
    Samir Choudhuri,"Queen Mary University of London, UK"
    Tirthankar Roy Choudhury,"NCRA-TIFR, India"
    Rajesh Mondal,"University of Sussex, UK"
    Arnab Chakraborty,"Indian Institute of Technology, Indore, India"
    Abinash Kumar Shaw,"Indian Institute of Technology Kharagpur, India"
    Aishrila Mazumder,"Indian Institute of Technology Indore, India"
    Mohd Kamran,"IIT INDORE, India"
    Madhurima Choudhury,"IIT Indore, India"
    Suman Majumdar,"IIT Indore, India"
    Abhirup Datta,"IIT Indore, India"

  • Bubble mapping with the Square Kilometre Array - I. Detecting galaxies with Euclid, JWST, WFIRST, and ELT within ionized bubbles in the intergalactic medium at z > 6
    ISBN No : Monthly Notices of the Royal Astronomical Society, Volume 493, Issue 1, March 2020, Pages 855€870, https://doi.org/10.1093/mnras/staa098, Oxford University Press on behalf of the Royal Astronomical Society (United Kingdom) View more
    Author
    Erik Zackrisson, Suman Majumdar, Rajesh Mondal, Christian Binggeli, Martin Sahlen, Tirthankar Roy Choudhury, Benedetta Ciardi, Abhirup Datta, Kanan K Datta, Pratika Dayal, Andrea Ferrara, Sambit K Giri, Umberto Maio, Sangeeta Malhotra, Garrelt Mellema, Andrei Mesinger, James Rhoads, Claes-Erik Rydberg, Ikkoh Shimizu
    Publisher :
    Monthly Notices of the Royal Astronomical Society, Volume 493, Issue 1, March 2020, Pages 855€870, https://doi.org/10.1093/mnras/staa098, Oxford University Press on behalf of the Royal Astronomical Society (United Kingdom)
    Monograph Overview

    The Square Kilometre Array (SKA) is expected to provide the first tomographic observations of the neutral intergalactic medium at redshifts z > 6 and pinpoint the locations of individual ionized bubbles during early stages of cosmic reionization. In scenarios where star-forming galaxies provide most of the ionizing photons required for cosmic reionization, one expects the first ionized bubbles to be centred on overdensities of such galaxies. Here, we model the properties of galaxy populations within isolated, ionized bubbles that SKA-1 should be able to resolve at z <=10, and explore the prospects for galaxy counts within such structures with various upcoming near-infrared telescopes. We find that, for the bubbles that are within reach of SKA-1 tomography, the bubble volume is closely tied to the number of ionizing photons that have escaped from the galaxies within. In the case of galaxy-dominated reionization, galaxies are expected to turn up above the spectroscopic detection threshold of JWST and ELT in even the smallest resolvable bubbles at z <=10. The prospects of detecting galaxies within these structures in purely photometric surveys with Euclid, WFIRST, JWST, or ELT are also discussed. While spectroscopy is preferable towards the end of reionization to provide a robust sample of bubble members, multiband imaging may be a competitive option for bubbles at z<= 10, due to the very small number of line-of-sight interlopers expected at these redshifts.

  • Type : JOINT_PUB

    Bubble mapping with the Square Kilometre Array - I. Detecting galaxies with Euclid, JWST, WFIRST, and ELT within ionized bubbles in the intergalactic medium at z > 6

    Author: Erik Zackrisson, Suman Majumdar, Rajesh Mondal, Christian Binggeli, Martin Sahlén, Tirthankar Roy Choudhury, Benedetta Ciardi, Abhirup Datta, Kanan K. Datta, Pratika Dayal, Andrea Ferrara, Sambit K. Giri, Umberto Maio, Sangeeta Malhotra, Garrelt Mellema, Andrei Mesinger, James Rhoads, Claes-Erik Rydberg, Ikkoh Shimizu

    Publication Year: 2020

    Volume: 493
    Pages: 855 - 870
    Publisher: Oxford University Press on behalf of the Monthly Notices of the Royal Astronomical Society
    Ref Doi: 10.1093/mnras/staa098

    View more