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SUMMARY:The GMRT CATz Surveys: The HI properties of galaxies at cosmic noo
 n [Foundation Day Lecture]
DTSTART:20260406T100000Z
DTEND:20260406T120000Z
DTSTAMP:20260415T091400Z
UID:indico-event-429@events.iiap.res.in
CONTACT:colloqm@iiap.res.in
DESCRIPTION:Speakers: Nissim Kanekar (NCRA-TIFR\, Pune)\n\nThe Indian Inst
 itute of Astrophysics traces its origins to an observatory established in 
 1786 at Madras\, which\, from 1792\, began to operate formally at its Nung
 ambakkam premises as the Madras Observatory. In 1899\, the observatory mov
 ed to Kodaikanal. On 1 April 1971\, the Kodaikanal Observatory became an a
 utonomous society under the name Indian Institute of Astrophysics. To comm
 emorate this occasion\, the institute organises the annual Foundation Day 
 Lecture delivered by distinguished speakers.AbstractThe weakness of the hy
 perfine HI 21cm line\, the main tracer of the HI content of galaxies\, has
  meant that we know little about the atomic gas mass of high-redshift gala
 xies and its evolution. Indeed\, the evolution of the HI content of galaxi
 es is one of the main open questions in galaxy evolution today.  Stacking
  of the HI 21cm emission signals from a large sample of galaxies\, observe
 d simultaneously with a radio interferometer\, can allow one to determine 
 the HI properties of the galaxy population. In this talk\, I will describe
  results from the Cold-HI AT z>~1 (CATz) HI 21cm surveys that we have been
  carrying out with the Giant Metrewave Radio Telescope\, aiming to detect 
 HI 21cm emission from star-forming galaxies in the redshift range z~1-3.0\
 , i.e. the period of cosmic noon and beyond\, to characterize the HI prope
 rties\, and measure the gas accretion rate\, the HI mass function\, and th
 e cosmological gas mass density\, of star-forming galaxies over the last 1
 1 billion years. \n\nhttps://events.iiap.res.in/event/429/
LOCATION:Auditorium
URL:https://events.iiap.res.in/event/429/
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