Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21535803b&link_type=abstract
American Astronomical Society, AAS Meeting #215, #358.03; Bulletin of the American Astronomical Society, Vol. 42, p.542
Astronomy and Astrophysics
Astronomy
Scientific paper
We present 21cm HI radio observations of foreground galaxy and background radio bright QSO pairs with extremely small projected distances. In particular I'll discuss our pilot project where we studied such a pair with projected distance of 2.5" (=1.7 kpc in galaxy rest frame) in detail using three NRAO facilities - the GBT, the VLA, and the VLBA. We detected a 21 cm HI absorber of column density ≥ 3.39 (± 0.11) × 1019 cm-2 at the redshift of the foreground galaxy. The HI absorber was found to be dynamically similar to a single quiescent cloud and was consistent with the cold neutral medium (CNM) found in the ISM of galaxies. The foreground galaxy is a low luminosity spiral with a low star-formation surface density of 0.001 Mo yr-1 kpc-2 . This galaxy remains undetected in HI emission, thus suggesting that while there are pockets of high column density gas, the total HI associated with the system is quite low.
Borthakur Sanchayeeta
Tripp Todd
Yun Min. S.
No associations
LandOfFree
21 cm HI Absorber in the Outer Disk & Halos of Galaxies does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with 21 cm HI Absorber in the Outer Disk & Halos of Galaxies, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and 21 cm HI Absorber in the Outer Disk & Halos of Galaxies will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-963231