Spitzer Infrared Spectrograph (IRS) Observations of the Redshift 3.91 Quasar APM 08279+5255

Details Spitzer Infrared Spectrograph (IRS) Observations of the Redshift 3.91 Quasar APM 08279+5255 Spitzer Infrared Spectrograph (IRS) Observations of the Redshift 3.91 Quasar APM 08279+5255

Sep 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004apjs..154..151s&link_type=abstract

The Astrophysical Journal Supplement Series, Volume 154, Issue 1, pp. 151-154.

Astronomy and Astrophysics

Astronomy

18

Galaxies: High-Redshift, Galaxies: Quasars: Emission Lines, Galaxies: Quasars: Individual: Alphanumeric: Apm 08279+5255, Techniques: Spectroscopic

Scientific paper

The Infrared Spectrograph (IRS) on board the Spitzer Space Telescope has been used to obtain low- and moderate-resolution spectra of the dust- and gas-rich quasar APM 08279+5255 (z=3.91). Broad Paα and Paβ recombination lines of hydrogen were detected at wavelengths of 9.235 and 6.315 μm, respectively, as well as a strong, red continuum that is a smooth power law over the observed (rest-frame) wavelength range 5.3-35 μm (1.08-7.1 μm). The observed Paα/Paβ line flux ratio of 1.05+/-0.2 is far from the case B value of ~2 and simple models of high-density, high optical depth ionized-gas regions (~1.8). This deviation is opposite in sense to the expected effect of reddening. No evidence is found in the spectrum for either the 3.3 or the 6.2 μm emission features usually attributed to aromatic hydrocarbons in gas-rich galaxies in the local universe. This is consistent with the high-luminosity active galactic nucleus (AGN) nature of APM 08279+5255.
The IRS was a collaborative venture between Cornell University and Ball Aerospace Corporation, funded by NASA through JPL and the Ames Research Center.

Affiliated with

Also associated with

No associations

Rating

Spitzer Infrared Spectrograph (IRS) Observations of the Redshift 3.91 Quasar APM 08279+5255 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 Spitzer Infrared Spectrograph (IRS) Observations of the Redshift 3.91 Quasar APM 08279+5255, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Spitzer Infrared Spectrograph (IRS) Observations of the Redshift 3.91 Quasar APM 08279+5255 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1061722