Zobrazeno 1 - 10
of 329
pro vyhledávání: '"Khosroshahi H"'
[Abridged] To understand the role of the galaxy group environment on galaxy evolution, we present a study of radio luminosity functions (RLFs) of group galaxies based on the VLA-COSMOS 3 GHz Large Project. The radio-selected sample of 7826 COSMOS gal
Externí odkaz:
http://arxiv.org/abs/2204.02082
Autor:
Gozaliasl, G., Finoguenov, A., Khosroshahi, H. G., Laigle, C., Kirkpatrick, C. C., Kiiveri, K., Devriendt, J., Dubois, Y., Ahoranta, J.
Publikováno v:
A&A 635, A36 (2020)
In an effort to better understand the formation of galaxy groups, we examine the kinematics of a large sample of spectroscopically confirmed X-ray galaxy groups in the Cosmic Evolution Survey (COSMOS) with a high sampling of galaxy group members up t
Externí odkaz:
http://arxiv.org/abs/2001.07367
Stellar mass -- halo mass relation for the brightest central galaxies of X-ray clusters since z~0.65
Autor:
Erfanianfar, G., Finoguenov, A., Furnell, K., Popesso, P., Biviano, A., Wuyts, S., Collins, C. A., Mirkazemi, M., Comparat, J., Khosroshahi, H., Nandra, K., Capasso, R., Rykoff, E., Wilman, D., Merloni, A., Clerc, N., Salvato, M., Chitham, J. I., Kelvin, L. S., Gozaliasl, G., Weijmans, A., Brownstein, J., Egami, E., Pereira, M. J., Schneider, D. P., Kirkpatrick, C., Damsted, S., Kukkola, A.
We present the brightest cluster galaxies (BCGs) catalog for SPectroscoic IDentification of eROSITA Sources (SPIDERS) DR14 cluster program value-added catalog. We list the 416 BCGs identified as part of this process, along with their stellar mass, st
Externí odkaz:
http://arxiv.org/abs/1908.01559
There is a correlation between bulge mass of the three main galaxies of the Local Group (LG), i.e. M31, Milky Way (MW), and M33, and the number of their dwarf spheroidal galaxies. A similar correlation has also been reported for spiral galaxies with
Externí odkaz:
http://arxiv.org/abs/1811.08898
The variation of a stellar light curve owing to the rotational modulation by the magnetic features (starspots and faculae) on the star's surface can be used to investigate the magnetic properties of the host star. In this paper, we use the periodicit
Externí odkaz:
http://arxiv.org/abs/1611.07262
Publikováno v:
MNRAS, 464, 4593 (2017); Erratum: MNRAS, 503, 2881 (2021)
We investigate how the stellar populations of the inner regions of the first and the second brightest group galaxies (respectively BGGs and SBGGs) vary as a function of magnitude gap, using an SDSS-based sample of 550 groups with elliptical BGGs. The
Externí odkaz:
http://arxiv.org/abs/1604.07726
We study Active Galactic Nucleus (AGN) activity in the fossil galaxy cluster, RX J1416.4+2315. Radio observations were carried out using Giant Metrewave Radio Telescope (GMRT) at two frequencies, 1420 MHz and 610 MHz. A weak radio lobe that extends f
Externí odkaz:
http://arxiv.org/abs/1509.08726
Autor:
Gozaliasl, G., Khosroshahi, H. G., Dariush, A. A., Finoguenov, A., Jassur, D. M. Z., Molaeinajad, A.
Publikováno v:
A&A 571, A49 (2014)
Using the semi-analytic models based on the Millennium simulation, we trace back the evolution of the luminosity function of galaxies residing in progenitors of groups classified by the magnitude gap at redshift zero. We determine the luminosity func
Externí odkaz:
http://arxiv.org/abs/1409.1215
Autor:
Miraghaei, H., Khosroshahi, H. G., Klöckner, H. -R., Ponman, T. J., Jetha, N. N., Raychaudhury, S.
We study intergalactic medium (IGM) heating in a sample of five fossil galaxy groups by using their radio properties at 610 MHz and 1.4 GHz. The power by radio jets introducing mechanical heating for the sampled objects is not sufficient enough to su
Externí odkaz:
http://arxiv.org/abs/1407.0759
Autor:
Gozaliasl, G., Finoguenov, A., Khosroshahi, H. G., Mirkazemi, M., Salvato, M., Jassur, D. M. Z., Erfanianfar, G., Popesso, P., Tanaka, M., Lerchster, M., Kneib, J. P., McCracken, H. J., Mellier, Y., Egami, E., Pereira, M. J., Brimioulle, F., Erben, T., Seitz, S.
Publikováno v:
A&A 566, A140 (2014)
We present a catalog of 129 X-ray galaxy groups, covering a redshift range 0.04
Externí odkaz:
http://arxiv.org/abs/1405.3412