Astronomy and Astrophysics – Astronomy
Scientific paper
Jul 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aipc.1248..391p&link_type=abstract
X-RAY ASTRONOMY 2009; PRESENT STATUS, MULTI-WAVELENGTH APPROACH AND FUTURE PERSPECTIVES: Proceedings of the International Confer
Astronomy and Astrophysics
Astronomy
1
X-Ray Spectroscopy, Redshift, Brightness, Star Formation, X-Ray, Distances, Redshifts, Radial Velocities, Spatial Distribution Of Galaxies, Magnitudes And Colors, Luminosities, Star Formation
Scientific paper
There exists a population of broad-line z~2 QSOs which have heavily absorbed X-ray spectra. These objects constitute ~10% of the population at luminosities and redshifts characteristic of the main producers of QSO luminosity in the Universe. Our follow up observations in the submm show that these QSOs are often embedded in ultraluminous starburst galaxies, unlike most unabsorbed QSOs at the same redshifts and luminosities. The radically different star formation properties between the absorbed and unabsorbed QSOs implies that the X-ray absorption is unrelated to the torus invoked in AGN unification schemes. Instead, these results suggest that the objects represent a transitional phase in an evolutionary sequence relating massive black holes and the formation of galaxies. The most puzzling question about these objects has always been the nature of the X-ray absorber. We present our study of the X-ray absorbers based on deep (50-100 ks) XMM-Newton spectroscopy. We show that the absorption is most likely due to a dense ionised wind driven by the QSO. This wind could be the mechanism by which the QSO terminates the star formation in the host galaxy, and ends the supply of accretion material, to produce the present day black hole/spheroid mass ratio.
Carrera Francicso J.
Page Mat J.
Stevens Jason A.
No associations
LandOfFree
QSO winds and galaxy evolution 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 QSO winds and galaxy evolution, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and QSO winds and galaxy evolution will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1644943