Astronomy and Astrophysics – Astrophysics
Scientific paper
Oct 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991apj...380l..67f&link_type=abstract
Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 380, Oct. 20, 1991, p. L67-L69.
Astronomy and Astrophysics
Astrophysics
28
Astronomical Spectroscopy, Bl Lacertae Objects, Elliptical Galaxies, Nebulae, Astronomical Observatories, Brightness Distribution, Charge Coupled Devices
Scientific paper
High-resolution imaging of the bright BL Lacertae object PKS 2155 - 304 reveals a symmetric nebulosity extending up to 15 arcsec from the nucleus and confirms the presence of a faint galaxy located about 4 arcsec away from the nucleus. It is shown that the redshift of 0.117, previously attributed to the BL Lac object, pertains in fact to the companion galaxy. The radial brightness profile of the surrounding nebulosity is consistent with that of an elliptical galaxy of effective radius of 4.5 arcsec which, assuming an absolute magnitude typical of luminous ellipticals, puts the object at a redshift of about 0.1. The field of PKS 2155 - 304 appears to be rich in galaxies, one of which is at a redshift of 0.116. A scenario in which the BL Lac object is hosted by a giant elliptical, which is the brightest member of a group of galaxies, is suggested by the observations.
Falomo Renato
Giraud Edmond
Maraschi Laura
Melnick Jorge
Tanzi Enrico G.
No associations
LandOfFree
On the nebulosity surrounding the BL Lacertae object PKS 2155 - 304 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 On the nebulosity surrounding the BL Lacertae object PKS 2155 - 304, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and On the nebulosity surrounding the BL Lacertae object PKS 2155 - 304 will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1875453