Zobrazeno 1 - 10
of 38
pro vyhledávání: '"Vrtilek, Jan M."'
Autor:
Schellenberger, Gerrit, David, Laurence P., O'Sullivan, Ewan, Vrtilek, Jan M., Haines, Chris P.
Abell1758 is a system of two galaxy clusters, a more massive, northern cluster and a southern cluster. Both parts are undergoing major merger events at different stages. Although the mass of the merger constituents provides enough energy to produce v
Externí odkaz:
http://arxiv.org/abs/1907.10581
Autor:
O'Sullivan, Ewan, Schellenberger, Gerrit, Burke, D. J., Sun, Ming, Vrtilek, Jan M., David, Laurence P., Sarazin, Craig
We present deep Chandra, XMM-Newton, Giant Metrewave Radio Telescope and Halpha observations of the group-group merger NGC 6338. X-ray imaging and spectral mapping show that as well as trailing tails of cool, enriched gas, the two cool cores are embe
Externí odkaz:
http://arxiv.org/abs/1906.07710
Autor:
O'Sullivan, Ewan, Kolokythas, Konstantinos, Kantharia, Nimisha G., Raychaudhury, Somak, David, Laurence P., Vrtilek, Jan M.
The NGC 5903 galaxy group is a nearby (~30 Mpc) system of ~30 members, dominated by the giant ellipticals NGC 5903 and NGC 5898. The group contains two unusual structures, a ~110 kpc long HI filament crossing NGC 5903, and a ~75 kpc wide diffuse, ste
Externí odkaz:
http://arxiv.org/abs/1710.01650
Autor:
O'Sullivan, Ewan, Ponman, Trevor J., Kolokythas, Konstantinos, Raychaudhury, Somak, Babul, Arif, Vrtilek, Jan M., David, Laurence P., Giacintucci, Simona, Gitti, Myriam, Haines, Christopher P.
Publikováno v:
MNRAS 472 (2017) 1482-1505
We present the Complete Local-Volume Groups Sample (CLoGS), a statistically complete optically-selected sample of 53 groups within 80 Mpc. Our goal is to combine X-ray, radio and optical data to investigate the relationship between member galaxies, t
Externí odkaz:
http://arxiv.org/abs/1708.03555
Autor:
Peris, Charith S., Vrtilek, Saeqa D., Steiner, James F., Vrtilek, Jan M., Wu, Jianfeng, McClintock, Jeffrey E., Longa-Peña, Penelope, Steeghs, Danny, Callanan, Paul, Ho, Luis C., Orosz, Jerome A., Reynolds, Mark T.
We present a spectroscopic analysis of the black hole binary Nova Muscae 1991 in quiescence using data obtained in 2009 with MagE on the Magellan Clay telescope and in 2010 with IMACS on the Magellan Baade telescope at the Las Campanas Observatory. E
Externí odkaz:
http://arxiv.org/abs/1502.06650
Autor:
O'Sullivan, Ewan, Kolokythas, Konstantinos, Raychaudhury, Somak, Vrtilek, Jan M., Kantharia, Nimisha
Galaxy groups form the environment of the majority of galaxies in the local Universe, and many host an extended hot intra-group medium whose radiative cooling appears to fuel, and be stabilised by, feedback from AGN in group-central galaxies. Unfortu
Externí odkaz:
http://arxiv.org/abs/1402.4676
We present temperature and abundance maps of the central 125 kpc of the NGC 5044 galaxy group, based an a deep XMM-Newton observation. The abundance map reveals an asymmetrical abundance structure, with the centroid of the highest abundance gas offse
Externí odkaz:
http://arxiv.org/abs/1310.2163
Autor:
Giacintucci, Simona, O'Sullivan, Ewan, Clarke, Tracy E., Murgia, Matteo, Vrtilek, Jan M., Venturi, Tiziana, David, Laurence P., Raychaudhury, Somak, Athreya, Ramana M.
We present deep Giant Metrewave Radio Telescope (GMRT) radio observations at 240, 330 and 610 MHz of the complex radio source at the center of the NGC1407 galaxy group. Previous GMRT observations at 240 MHz revealed faint, diffuse emission enclosing
Externí odkaz:
http://arxiv.org/abs/1206.5751
Autor:
O'Sullivan, Ewan, Giacintucci, Simona, David, Laurence P., Gitti, Myriam, Vrtilek, Jan M., Raychaudhury, Somak, Ponman, Trevor J.
We present scaling relations between jet power and radio power measured using the Giant Metrewave Radio Telescope (GMRT), Chandra and XMM-Newton, for a sample of 9 galaxy groups combined with the Birzan et al. sample of clusters. Cavity power is used
Externí odkaz:
http://arxiv.org/abs/1104.2411
Autor:
O'Sullivan, Ewan, Giacintucci, Simona, David, Laurence P., Vrtilek, Jan M., Raychaudhury, Somak
We use a Chandra observation of the poor cluster AWM4 to map the temperature and abundance of the intra-cluster medium, so as to examine the influence of the central radio galaxy on its environment. While the cluster core is generally enriched to nea
Externí odkaz:
http://arxiv.org/abs/1010.0610