Near-Infrared Observations of the Z approximately 2.3 IRAS Source FSC 10214+4724

November 1991 • 1991ApJ...381L..55S

Authors • Soifer, B. T. • Neugebauer, G. • Graham, J. R. • Matthews, K. • Mazzarella, J. M. • Lonsdale, C. J. • Rowan-Robinson, M. • Broadhurst, T. • Lawrence, A. • McMahon, R.

Abstract • Near-infrared imaging and spectroscopy of the extremely luminous IRAS source FSC 10214+4724 have been obtained using the Cassegrain infrared camera on the 200 inch (5.08 m) Hale Telescope. A low-resolution spectrum (λ/dλ~100) in the 2.0-2.4 micron atmospheric window shows a very strong Hα line at the optically determined redshift z = 2.286. The observed rest-frame equivalent width of Hα is 0.07 + 0.02 micron, consistent with the largest values found in quasars. The images show an unresolved source, while the near-infrared colors are somewhat redder than the mean colors of quasars observed at the same redshift. The reddening inferred is A_v_~1.5 mag, with an upper limit of ~3.0 mag. The observations presented here cannot distinguish between starburst and quasar models for this source. Starburst models require ~10^12^ M_sun_ of stars to have been formed over 10^7^-10^8^ yr. If FSC 10214+4724 is a quasar, the reddening-corrected bolometric luminosity is approximately equal to the observed infrared luminosity.

Links

• SIMBAD http://simbad.u-strasbg.fr/simbo.pl?bibcode=1991ApJ...381L..55S
• NED https://ned.ipac.caltech.edu/uri/NED::InRefcode/1991ApJ...381L..55S
• GIF http://articles.adsabs.harvard.edu/full/1991ApJ...381L..55S
• ARTICLE http://articles.adsabs.harvard.edu/full/1991ApJ...381L..55S?defaultprint=YES