English
 
Help Privacy Policy Disclaimer
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT

Released

Journal Article

Estimation of the mass of the very massive galaxy cluster SRGe CL2305.2-2248 from strong lensing

MPS-Authors
/persons/resource/persons4726

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

/persons/resource/persons4829

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

/persons/resource/persons128884

Khabibullin,  I. I.
High Energy Astrophysics, MPI for Astrophysics, Max Planck Society;

/persons/resource/persons4827

Churazov,  E. M.
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

Khamitov, I. M., Bikmaev, I. F., Lyskova, N. S., Kruglov, A. A., Burenin, R. A., Gilfanov, M. R., et al. (2022). Estimation of the mass of the very massive galaxy cluster SRGe CL2305.2-2248 from strong lensing. Astronomy Letters-a Journal of Astronomy and Space Astrophysics, 48(1), 1-8. doi:10.1134/S1063773722010042.


Cite as: https://hdl.handle.net/21.11116/0000-000B-5F7F-E
Abstract
SRGe CL2305.2–2248 (SPT-CL J2305–2248, ACT-CL J2305.1–2248) is one of the most massive galaxy clusters at high redshifts (z≃0.76) and is of great interest for cosmology. Deep images have been obtained at the Russian–Turkish 1.5-m telescope (RTT-150) for an optical identification of this cluster. In combination with the open Hubble Space Telescope archival data, they have made it possible to select candidates for gravitationally lensed images of distant blue galaxies in the form of arcs and arclets. The observed giant arc near the brightest cluster galaxies allows the Einstein radius to be estimated, 9.8±1.3 arcsec. The photometric redshift of the lensed source has been found (zs=2.44±0.07). Its use in combination with the Einstein radius estimate has made it possible to independently estimate the mass of SRGe CL2305.2–2248 by extrapolating the strong-lensing results to large radii and using model density profiles in relaxed clusters. This extrapolation leads to mass estimates smaller than those obtained from X-ray and microwave observations by a factor of ∼1.5−3. A probable cause of this discrepancy may be the galaxy merger process, which is also confirmed by the morphology of SRGe CL2305.2–2248 in the optical range.