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A New Sample of Gamma-Ray Emitting Jetted Active Galactic Nuclei—Preliminary Results

Journal Article · · Universe
 [1];  [2];  [3];  [4];  [5];  [6];  [7];  [8];  [1];  [1];  [5]
  1. Istituto Nazionale di Astrofisica (INAF) (Italy)
  2. Purdue Univ., West Lafayette, IN (United States)
  3. Univ. of Coimbra (Portugal)
  4. European Southern Observatory (ESO) (Chile); Univ. of Turku (Finland); Aalto Univ. (Finland)
  5. University of Padova (Italy)
  6. Univ. College London (United Kingdom)
  7. Aalto Univ. (Finland)
  8. European Space Astronomy Centre (ESAC) (Spain)
+ Show Author Affiliations
We are compiling a new list of gamma-ray jetted active galactic nuclei (AGN), starting from the fourth catalog of point sources of the Fermi Large Area Telescope (LAT). Our aim is to prepare a list of jetted AGN with known redshifts and classifications to be used to calibrate jet power. We searched in the available literature for all the published optical spectra and multiwavelength studies useful to characterize the sources. We found new, missed, or even forgotten information leading to a substantial change in the redshift values and classification of many sources. We present here the preliminary results of this analysis and some statistics based on the gamma-ray sources with right ascension within the interval 0h--12h (J2000). Although flat-spectrum radio quasars and BL Lac objects are still the dominant populations, there is a significant increase in the number of other objects, such as misaligned AGN, narrow-line Seyfert 1 galaxies, and Seyfert galaxies. We also introduced two new classes of objects: changing-look AGN and ambiguous sources. About one third of the sources remain unclassified.
Research Organization:
US Department of Energy (USDOE), Washington, DC (United States). Office of Science, Sloan Digital Sky Survey (SDSS)
Sponsoring Organization:
National Aeronautics and Space Administration (NASA); National Science Foundation (NSF); USDOE
OSTI ID:
1983140
Journal Information:
Universe, Journal Name: Universe Journal Issue: 10 Vol. 7; ISSN 2218-1997
Publisher:
MDPICopyright Statement
Country of Publication:
United States
Language:
English

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Related Subjects

79 ASTRONOMY AND ASTROPHYSICS
BL Lac objects
Seyfert galaxies
quasars
relativistic jets