Wide-Field, R and H Band Imaging of Quasar Environments

Details Wide-Field, R and H Band Imaging of Quasar Environments Wide-Field, R and H Band Imaging of Quasar Environments

Dec 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998aas...19310707f&link_type=abstract

American Astronomical Society, 193rd AAS Meeting, #107.07; Bulletin of the American Astronomical Society, Vol. 30, p.1411

Astronomy and Astrophysics

Astronomy

Scientific paper

This study examines the large-scale environments of radio-loud and radio-quiet quasars. The large-scale environments of quasars are interesting because quasars are thought to be triggered by interactions with neighboring galaxies and/or intercluster gas. Studies show that quasars reside in overdense regions, and radio-quiet quasars, while more likely to have close companions than field galaxies, tend to reside in poorer clusters than radio-loud quasars. To improve our understanding of the correlation between radio properties and environment, we imaged a carefully selected sample from the Large Bright Quasar Survey (LBQS). The sample consists of sixteen quasars in the redshift range 0.4 < z < 0.5 with absolute blue magnitudes between -23.0 and -26.5. Six of the quasars are radio-loud, and the ten remaining quasars have 8.4 GHz luminosities <= 10(23.5) W * Hz(-1) . R-band images of the quasars and control fields were taken at the Steward 90 inch. The same fields were then imaged in the H-band using a new wide-field infrared camera, PISCES. PISCES is an ideal instrument for this study because its 8.5' field corresponds to a projected distance of 2.4 Mpc at z ~ 0.4. This allows simultaneous sampling of the quasar environment and a control field. The H and R-band photometry allows identification of companion galaxies, and the color information helps to discriminate between foreground and cluster galaxies. Preliminary results are presented comparing galaxy counts within 1 Mpc of the quasars to field galaxy counts.

Affiliated with

Also associated with

No associations

Rating

Wide-Field, R and H Band Imaging of Quasar Environments 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 Wide-Field, R and H Band Imaging of Quasar Environments, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Wide-Field, R and H Band Imaging of Quasar Environments will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-997765