Zobrazeno 41 - 50
of 237
pro vyhledávání: '"O'Sullivan, Ewan"'
Autor:
Paggi, Alessandro, Kim, Dong-Woo, Anderson, Craig, Burke, Doug, D'Abrusco, Raffaele, Fabbiano, Giuseppina, Fruscione, Antonella, Gokas, Tara, Lauer, Jen, McCollough, Michael, Morgan, Doug, Mossman, Amy, O'Sullivan, Ewan, Trinchieri, Ginevra, Vrtilek, Saeqa, Pellegrini, Silvia, Romanowsky, Aaron J., Brodie, Jean
We present results of a joint \textit{Chandra}/\textit{XMM-Newton} analysis of the early-type galaxies NGC 4649 and NGC 5846 aimed at investigating differences between mass profiles derived from X-ray data and those from optical data, to probe the st
Externí odkaz:
http://arxiv.org/abs/1706.02303
Akademický článek
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Autor:
Kolokythas, Konstantinos, O'Sullivan, Ewan, Giacintucci, Simona, Raychaudhury, Somak, Ishwara-Chandra, C. H., Worrall, Diana M., Birkinshaw, Mark
Publikováno v:
MNRAS 450 (2015), 1732-1744
We present Giant Metrewave Radio Telescope (GMRT) 240 MHz observations of the nearby luminous FR I radio source 3C 270, in the group-central elliptical NGC 4261. Combining these data with reprocessed Very Large Array (VLA) 1.55 and 4.8 GHz observatio
Externí odkaz:
http://arxiv.org/abs/1503.07549
Autor:
David, Laurence P., Lim, Jeremy, Forman, William, Vrtilek, Jan, Combes, Francoise, Salome, Philippe, Edge, Alastair, Jones, Christine, Sun, Ming, O'Sullivan, Ewan, Gastaldello, Fabio, Temi, Pasquale, Schmitt, Henrique, Ohyama, Youichi, Hamer, Stephen, Mathews, William, Brighenti, Fabrizio, Giacintucci, Simona, Bardelli, Sandro, Trung, Dinh-V
A short 30 minute ALMA observation of the early-type galaxy NGC 5044, which resides at the center of an X-ray bright group with a moderate cooling flow, has detected 24 molecular structures within the central 2.5 kpc. The masses of the molecular stru
Externí odkaz:
http://arxiv.org/abs/1407.3235
Autor:
Kolokythas, Konstantinos, O'Sullivan, Ewan, Raychaudhury, Somak, Ishwara-Chandra, C. H., Kantharia, Nimisha
Much of the evolution of galaxies takes place in groups where feedback has the greatest impact on galaxy formation. By using an optically selected, statistically complete sample of 53 nearby groups (CLoGS), observed in Radio (GMRT) and in X-rays (Cha
Externí odkaz:
http://arxiv.org/abs/1402.5109
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:
O'Sullivan, Ewan
It has been known for some time that many early–type galaxies possess halos of X–ray emitting gas. However, the properties of these halos and the processes by which they form are as yet not well understood. We have compiled the largest catalogue
Externí odkaz:
https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.489606
Autor:
Sanderson, Alastair J. R., O'Sullivan, Ewan, Ponman, Trevor J., Gonzalez, Anthony H., Sivanandam, Suresh, Zabludoff, Ann I., Zaritsky, Dennis
We present a study of the hot gas and stellar content of 5 optically-selected poor galaxy clusters, including a full accounting of the contribution from intracluster light (ICL) and a combined hot gas and hydrostatic X-ray mass analysis with XMM obse
Externí odkaz:
http://arxiv.org/abs/1212.1613
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