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      Permanent link:
      https://www.ias.ac.in/article/fulltext/joaa/032/04/0613-0614

    • Keywords

       

      Radio source; high red-shift; galaxies.

    • Abstract

       

      High red-shift radio galaxies are best searched at low radio frequencies, due to its steep radio spectra. Here we present preliminary results from our programme to search for high red-shift radio galaxies to ∼ 10 to 100 times fainter than the known population till date. We have extracted ultra-steep spectrum (USS) samples from deep 150 MHz Giant Meter-wave Radio Telescope (GMRT) observations from one of the three well-studied DEEP2 fields to this effect. From correlating these radio sources with respect to the high-frequency catalogues such as VLA, FIRST and NVSS at 1.4 GHz, we find ∼ 100 steep spectrum (spectral index, 𝛼 > 1) radio sources, which are good candidates for high red-shift radio galaxies.

    • Author Affiliations

       

      Susanta K. Bisoi1 C. H. Ishwara-Chandra2 S. K. Sirothia2 P. Janardhan1

      1. Astronomy & Astrophysics Division, Physical Research Laboratory, Ahmedabad 380 009, India.
      2. National Centre for Radio Astrophysics, Post Bag No. 3, Ganeshkind, Pune 411 007, India.

    • Dates

       
      Published
      December 2011

  • Journal of Astrophysics and Astronomy | News

    • Continuous Article Publication

      Posted on January 27, 2016

      Since January 2016, the Journal of Astrophysics and Astronomy has moved to Continuous Article Publishing (CAP) mode. This means that each accepted article is being published immediately online with DOI and article citation ID with starting page number 1. Articles are also visible in Web of Science immediately. All these have helped shorten the publication time and have improved the visibility of the articles.

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      Posted on July 25, 2019

      Click here for Editorial Note on CAP Mode

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