Astronomy and Astrophysics – Astronomy
Scientific paper
May 1998
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998aas...192.3601b&link_type=abstract
American Astronomical Society, 192nd AAS Meeting, #36.01; Bulletin of the American Astronomical Society, Vol. 30, p.862
Astronomy and Astrophysics
Astronomy
Scientific paper
We have analyzed the relationship between gamma-ray and optical emission during flaring and non-flaring states of blazars. During the flaring states, we note that there is a moderate correlation between gamma-ray and optical fluxes for some sources, with a possible redshift dependence of the correlation slope. Upon considering all of the EGRET/optical data from non-flaring states as well, we find a striking dependence of the gamma-ray to optical flux ratio on redshift. Though, its is unclear whether this is truely a redshift dependence or a correlation with luminosity. In general, for large samples of blazars, high z objects will tend to have higher Doppler factors, as inferred from VLBI. Thus, if the detected gamma-ray emission were to have a separate dependence on the Doppler beaming factor than the synchrotron emission, as is the case for external Compton scattering models, we would expect a redshift dependence of the gamma-ray/optical ratio. An alternative explanation is that certain processes are most efficient (and will dominate the SED) at higher luminosity. We discuss these findings in light of recent modeling of the SED's of blazars and consideration of possible selection effects.
Bloom Steven
Sreekumar Parameswaran
No associations
LandOfFree
Examining Correlations between the Gamma-Ray and Optical Emission of Blazars 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 Examining Correlations between the Gamma-Ray and Optical Emission of Blazars, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Examining Correlations between the Gamma-Ray and Optical Emission of Blazars will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1364570