PG 1700+518 Revisited: Adaptive Optics Imaging and a Revised Starburst Age for the Companion

Details PG 1700+518 Revisited: Adaptive Optics Imaging and a Revised Starburst Age for the Companion PG 1700+518 Revisited: Adaptive Optics Imaging and a Revised Starburst Age for the Companion

1998-03-30

arxiv.org/abs/astro-ph/9803333v1

Astronomy and Astrophysics

Astrophysics

11 pages; includes two eps figures. Latex (AASTEX). Two additional figures in gif format. Postscript version including all fig

Scientific paper

10.1086/311409

We present the results of adaptive-optics imaging of the z=0.2923 QSO PG 1700+518 in the J and H bands. The extension to the north of the QSO is clearly seen to be a discrete companion with a well-defined tidal tail, rather than a feature associated with the host galaxy of PG 1700+518 itself. On the other hand, an extension to the southwest of the QSO (seen best in deeper, but lower-resolution, optical images) does likely comprise tidal material from the host galaxy. The SED derived from images in J, H, and two non-standard optical bands indicates the presence of dust intermixed with the stellar component. We use our previously reported Keck spectrum of the companion, the SED found from the imaging data, and updated spectral-synthesis models to constrain the stellar populations in the companion and to redetermine the age of the starburst. While our best-fit age of 0.085 Gyr is nearly the same as our earlier determination, the fit of the new models is considerably better. This age is found to be remarkably robust with respect to different assumptions about the nature of the older stellar component and the effects of dust.

Affiliated with

Also associated with

No associations

Rating

PG 1700+518 Revisited: Adaptive Optics Imaging and a Revised Starburst Age for the Companion 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 PG 1700+518 Revisited: Adaptive Optics Imaging and a Revised Starburst Age for the Companion, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and PG 1700+518 Revisited: Adaptive Optics Imaging and a Revised Starburst Age for the Companion will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-309235