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Prospects of detection of the first sources with SKA using matched filters

Published online by Cambridge University Press:  08 May 2018

Raghunath Ghara Open the ORCID record for Raghunath Ghara [Opens in a new window] ,
T. Roy Choudhury ,
Kanan K. Datta ,
Garrelt Mellema ,
Samir Choudhuri ,
Suman Majumdar  and
Sambit K. Giri
Raghunath Ghara*
Affiliation:
Department of Astronomy & Oskar Klein Centre, AlbaNova, Stockholm University, SE-106 91 Stockholm, Sweden
T. Roy Choudhury
Affiliation:
National Centre for Radio Astrophysics, TIFR, Post Bag 3, Ganeshkhind, Pune 411007, India
Kanan K. Datta
Affiliation:
Department of Physics, Presidency University, 86/1 College Street, Kolkata - 700073, India
Garrelt Mellema
Affiliation:
Department of Astronomy & Oskar Klein Centre, AlbaNova, Stockholm University, SE-106 91 Stockholm, Sweden
Samir Choudhuri
Affiliation:
National Centre for Radio Astrophysics, TIFR, Post Bag 3, Ganeshkhind, Pune 411007, India
Suman Majumdar
Affiliation:
Department of Physics, Blackett Laboratory, Imperial College, London SW7 2AZ, UK
Sambit K. Giri
Affiliation:
Department of Astronomy & Oskar Klein Centre, AlbaNova, Stockholm University, SE-106 91 Stockholm, Sweden
*
*email: ghara.raghunath@gmail.com
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Abstract

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The matched filtering technique is an efficient method to detect H ii bubbles and absorption regions in radio interferometric observations of the redshifted 21-cm signal from the epoch of reionization and the Cosmic Dawn. Here, we present an implementation of this technique to the upcoming observations such as the SKA1-low for a blind search of absorption regions at the Cosmic Dawn. The pipeline explores four dimensional parameter space on the simulated mock visibilities using a MCMC algorithm. The framework is able to efficiently determine the positions and sizes of the absorption/H ii regions in the field of view.

Keywords

radiative transfermethods: numericalgalaxies: high-redshift, formation, evolution, intergalactic medium
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 12 , Symposium S333: Peering towards Cosmic Dawn , October 2017 , pp. 122 - 125
Copyright
Copyright © International Astronomical Union 2018 

References

Datta, K. K., Bharadwaj, S., & Choudhury, T. R.. MNRAS, 382: 809–818, December 2007.Google Scholar
Datta, K. K., Friedrich, M. M., Mellema, G., Iliev, I. T., & Shapiro, P. R.. MNRAS, 424: 762–778, July 2012.Google Scholar
Ghara, R., Choudhury, T. R., & Datta, K. K.. MNRAS, 447: 1806–1825, February 2015.Google Scholar
Ghara, R., Choudhury, T. R., & Datta, K. K.. MNRAS, 460: 827–843, July 2016.Google Scholar
Ghara, R., Choudhury, T. R., Datta, K. K., & Choudhuri, S.. MNRAS, 464: 2234–2248, January 2017a.CrossRefGoogle Scholar
Ghara, R., Mellema, G., Giri, S. K., Choudhury, T. R., Datta, K. K., & Majumdar, S.. arXiv:1710.09397, October 2017b.Google Scholar
Giri, S. K., Mellema, G., & Ghara, R.. arXiv:1801.06550, January 2018.Google Scholar
Greig, B. & Mesinger, A.. MNRAS, 449: 4246–4263, June 2015.CrossRefGoogle Scholar
Majumdar, S., Bharadwaj, S., & Choudhury, T. R.. MNRAS, 426: 3178–3194, November 2012.CrossRefGoogle Scholar
Mellema, G., Koopmans, L., Shukla, H., Datta, K. K., Mesinger, A., & Majumdar, S.. Advancing Astrophysics with the Square Kilometre Array (AASKA14), art. 10, 2015.Google Scholar
Shimabukuro, H. & Semelin, B.. MNRAS, 468: 3869–3877, July 2017.Google Scholar