335 citations · 8.1k across the 221 of their papers we have counts for
223 papers
Multiple H I 21-cm absorbers towards blazar PKS 1158+007
Abhisek Mohapatra, R. Srianand, R. Dutta
We report an interesting line of sight towards the blazar PKS 1158+007 (J1201+0028) ( = 1.369), revealing the rare detection of two intervening HI 21-cm absorption syst…
High-S/N Quasar Observations with HST/COS: Deep Fields for Spectroscopy
Andrew J. Fox, Jerry Kriss, Philipp Richter +49
Hubble is still in prime observing condition for making transformative discoveries in UV astronomy. In this white paper we describe the science case for a deep (S/N>30) UV spectros…
Investigating the Circumgalactic Medium through Mg II absorption coincidence
Paryag Sharma, Raghunathan Srianand, Hum Chand +1
We present a statistical measurement of the transverse coherence of Mg II absorption using a large sample of 9204 absorber-centric quasar sightline pairs from t…
Cosmic Chance Superpositions: Largest Catalog of Quasar-Galaxy Pairs at a Projected Separation of kpc
Labanya Kumar Guha, Raghunathan Srianand, Rajeshwari Dutta
We present the largest catalogue to date of Galaxies On Top Of Quasars (GOTOQs), systems where the sightline to a background quasar passes directly through or very close to a foreg…
Quasar radiation transforms the gas in a merging companion galaxy
Sergei Balashev, Pasquier Noterdaeme, Neeraj Gupta +7
Quasars, powered by gas accretion onto supermassive black holes, rank among the most energetic objects of the Universe. While they are thought to be ignited by galaxy mergers and a…
HI 21-cm Absorption Associated with Foreground Galaxies on Top of Quasars
Labanya Kumar Guha, Raghunathan Srianand, Rajeshwari Dutta
A systematic search for HI 21-cm absorption in Quasar-Galaxy Pairs (QGPs) provides a powerful means to map the distribution of cold gas around high-redshift star-forming galaxies.…