Infrared Spectral Observation of Eight BL Lac Objects from the Spitzer Infrared Spectrograph

Details Infrared Spectral Observation of Eight BL Lac Objects from the Spitzer Infrared Spectrograph Infrared Spectral Observation of Eight BL Lac Objects from the Spitzer Infrared Spectrograph

May 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011apj...732...22c&link_type=abstract

The Astrophysical Journal, Volume 732, Issue 1, article id. 22 (2011).

Astronomy and Astrophysics

Astronomy

3

Bl Lacertae Objects: General, Infrared: Galaxies

Scientific paper

The Spitzer Infrared Spectrograph (IRS) low-resolution spectra for eight BL Lac objects are presented in this paper. It can be seen that the infrared spectrum of S5 0716+714 shows in the IRS region many emission features that would be from a nearby galaxy. It is also shown that, except for the silicate absorptions around 10 μm for some sources, emission lines in the infrared spectra for the other seven BL Lac objects are indeed very weak or absent. In addition, ignoring the silicate feature, all spectra can be well fitted by a power-law distribution indicative of the emission mechanism of the synchrotron radiation for these BL Lac objects in the IRS region.

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