2012/07/20 by Kyle D. Hiner, Gabriela Canalizo, Margrethe Wold +5
Physics and Astronomy · #Astronomy #Astronomy and Astrophysical Research #Astrophysical Phenomena and Observations #Astrophysics #Balmer series #Black hole (networking) #Bulge #Emission spectrum #Galaxies: Formation, Evolution, Phenomena #Galaxy #Physics #Quasar #Spectral line #Star formation #Stellar population #Universe #astro-ph.CO
paper · pdf · doi:10.1088/0004-637x/756/2/162
15 pages, 9 figures, accepted for publication in ApJ
arxiv created 2012/07/20 · openalex publication_date 2012/08/24 · arxiv updated 2015/06/05 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
The M BH –σ * relation has been studied extensively for local galaxies, but to date there have been scarce few direct measurements of stellar velocity dispersions for systems beyond the local universe. We investigate black hole and host galaxy properties of six "post-starburst quasars" (PSQs) at z ∼ 0.3. Spectra of these objects simultaneously display features from the active nucleus including broad emission lines and a host galaxy Balmer absorption series indicative of the post-starburst stellar population. These are the first measurements of σ * in such objects, and we significantly increase the number of directly measured non-local objects on the M BH –σ * diagram. The "PSQs" of our sample fall on or above the locally defined M BH –σ * relation, a result that is consistent with previous M BH –σ * studies of samples at z > 0.1. However, they are generally consistent with the M BH – L bulge relation. Furthermore, their location on the Faber–Jackson relation suggests that some of the bulges may be dynamically peculiar.