English
 
Help Privacy Policy Disclaimer
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT

Released

Journal Article

Optical Spectroscopy of Quasars Discovered by SRG/eROSITA with a 2.5-m Telescope at the Caucasus Mountain Observatory of SAI MSU

MPS-Authors
/persons/resource/persons4726

Gilfanov,  M. R.
High Energy Astrophysics, MPI for Astrophysics, Max Planck Society;

/persons/resource/persons4829

Sunyaev,  R. A.
High Energy Astrophysics, MPI for Astrophysics, Max Planck Society;

External Resource
No external resources are shared
Fulltext (restricted access)
There are currently no full texts shared for your IP range.
Fulltext (public)
There are no public fulltexts stored in PuRe
Supplementary Material (public)
There is no public supplementary material available
Citation

Dodin, A. V., I.Shatsky, N., Belinski, A. A., Atapin, K. E., Burlak, M. A., Zheltoukhov, S. G., et al. (2022). Optical Spectroscopy of Quasars Discovered by SRG/eROSITA with a 2.5-m Telescope at the Caucasus Mountain Observatory of SAI MSU. Astronomy Letters - a Journal of Astronomy and Space Astrophysics, 47(10), 661-673. doi:10.1134/S1063773721100029.


Cite as: http://hdl.handle.net/21.11116/0000-000A-140D-2
Abstract
Based on observations with the transient double-beam spectrograph (TDS) at the 2.5-m telescope of the Caucasus Mountain Observatory of SAI MSU, we have determined the redshifts for 15 new quasars detected in X-rays by the eROSITA telescope of the SRG orbital observatory during the first three all-sky surveys. The redshifts of the sources lie in the range 0.5–4.156. We have estimated the masses of the central supermassive black holes and the bolometric luminosities for eight quasars from the width of the C IV 1549 Å emission line and the continuum flux at 1350 Å. For these objects we have also estimated the ratio of the X-ray luminosity to the Eddington limit to be a few percent. At the same time, the bolometric-to-Eddington luminosity ratio for them has turned out to be in a fairly narrow range, 30–40%. A large Lbol/LEdd ratio points to an active growth of the mass of the central black holes in these objects.