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SUMMARY:SMA observations of the archetypal CSS radio source 3C 303.1
DTSTART;VALUE=DATE-TIME:20261028T181900Z
DTEND;VALUE=DATE-TIME:20261028T182000Z
DTSTAMP;VALUE=DATE-TIME:20261025T223044Z
UID:indico-contribution-3670@nyx.physics.mcgill.ca
DESCRIPTION:Speakers: Rushikesh Bhutkar (University of Manitoba)\nAGN (act
 ive galactic nuclei) feedback plays a crucial role in shaping galaxy evolu
 tion. Numerical simulations show that the kinetic energy transfer efficien
 cy from radio jets to interstellar medium (ISM) is relatively high\, sugge
 sting a significant role of radio jets in the feedback. We investigate AGN
  feedback on cold gas in the compact steep-spectrum (CSS) radio source 3C 
 303.1. CSS sources are largely young radio galaxies evolving through dense
  environments of their host galaxies. This early evolutionary phase likely
  represents a critical stage in which the radio source has maximum impact 
 on host galaxy evolution. 3C 303.1 is the only CSS source so far showing a
 lignment in optical\, X-ray and UV with the radio structure\, making it an
  interesting source to investigate jet-feedback. We present continuum and 
 spectral line observations of the J=3-2 transition of carbon monoxide ($^{
 12}$CO) of 3C 303.1\, obtained with the Submillimeter Array. We detect con
 tinuum emission at 221.1 and 271.2~GHz. We do not detect the $^{12}$CO(J=3
 -2) line and derive an upper limit on the molecular gas mass of $\\sim 2.3
  \\times 10^{9}\\ \\mathrm{M_\\odot}$. The gas-to-dust mass (G/D) ratio is
  found to be at the lower end of typical Galactic values\, and the star-fo
 rmation rate (SFR) derived is moderate but declining likely due to a recen
 t  quenching event. Therefore\, $^{12}$CO(J=3-2) non-detection\, relativel
 y low G/D ratio\, and the moderate but declining SFR point to the shock-he
 ating and/or removal of CO gas by AGN\, consistent with the AGN feedback s
 ignatures observed in 3C 303.1.\n\nhttps://nyx.physics.mcgill.ca/event/587
 /contributions/3670/
LOCATION:Online 
URL:https://nyx.physics.mcgill.ca/event/587/contributions/3670/
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