Zobrazeno 1 - 10
of 237
pro vyhledávání: '"O'Sullivan, Ewan"'
Autor:
O'Sullivan, Ewan, Rajpurohit, Kamlesh, Schellenberger, Gerrit, Vrtilek, Jan, David, Laurence P., Babul, Arif, Olivares, Valeria, Ubertosi, Francesco, Kolokythas, Konstantinos, Babyk, Iurii, Loubser, Ilani
NGC 777 provides an example of a phenomenon observed in some group-central ellipticals, in which the temperature profile shows a central peak, despite the short central cooling time of the intra-group medium. We use deep Chandra X-ray observations of
Externí odkaz:
http://arxiv.org/abs/2405.13667
Autor:
Eckert, Dominique, Gastaldello, Fabio, O'Sullivan, Ewan, Finoguenov, Alexis, Brienza, Marisa, collaboration, the X-GAP
The co-evolution between supermassive black holes and their environment is most directly traced by the hot atmospheres of dark matter halos. Cooling of the hot atmosphere supplies the central regions with fresh gas, igniting active galactic nuclei (A
Externí odkaz:
http://arxiv.org/abs/2403.17145
Autor:
Rose, Tom, McNamara, B. R., Combes, F., Edge, A. C., McDonald, M., O'Sullivan, Ewan, Russell, H., Fabian, A. C., Ferland, G., Salome, P., Tremblay, G.
We present new ALMA observations of CO, CN, CS, HCN and HCO$^{+}$ absorption seen against the bright and compact radio continuum sources of eight massive galaxies. Combined with archival observations, they reveal two distinct populations of molecular
Externí odkaz:
http://arxiv.org/abs/2403.03974
Autor:
Rosignoli, Luca, Ubertosi, Francesco, Gitti, Myriam, Brighenti, Fabrizio, Pasini, Thomas, O'Sullivan, Ewan, Gastaldello, Fabio, Gaspari, Massimo, Temi, Pasquale
We present the analysis of new, deep $Chandra$ observations (130~ks) of the galaxy cluster Abell~2495. This object is known for the presence of a triple offset between the peaks of the intracluster medium (ICM), the brightest cluster galaxy (BCG), an
Externí odkaz:
http://arxiv.org/abs/2312.12855
Autor:
Ubertosi, Francesco, Schellenberger, Gerrit, O'Sullivan, Ewan, Vrtilek, Jan, Giacintucci, Simona, David, Laurence P., Forman, William, Gitti, Myriam, Venturi, Tiziana, Jones, Christine, Brighenti, Fabrizio
Recent observations of galaxy clusters and groups with misalignments between their central AGN jets and X-ray cavities, or with multiple misaligned cavities, have raised concerns about the jet - bubble connection in cooling cores, and the processes r
Externí odkaz:
http://arxiv.org/abs/2312.02283
Autor:
HyeongHan, Kim, Cho, Hyejeon, Jee, M. James, Wittman, David, Cha, Sangjun, Lee, Wonki, Finner, Kyle, Rajpurohit, Kamlesh, Brüggen, Marcus, Forman, William, Jones, Christine, van Weeren, Reinout, Botteon, Andrea, Lovisari, Lorenzo, Stroe, Andra, Domínguez-Fernández, Paola, O'Sullivan, Ewan, Vrtilek, Jan
Publikováno v:
2024 ApJ 962 100
The galaxy cluster Abell 746 (A746; $z$=0.214), featuring a double radio relic system, two isolated radio relics, a possible radio halo, disturbed V-shaped X-ray emission, and intricate galaxy distributions, is a unique and complex merging system. We
Externí odkaz:
http://arxiv.org/abs/2311.00643
Autor:
Kim, Dong-Woo, Cassity, Alyssa, Bhatt, Binod, Fabbiano, Giuseppina, Galarza, Juan Rafael Martinez, O'Sullivan, Ewan, Rots, Arnold
Publikováno v:
2023 ApJS 268 17
We present an extensive and well-characterized Chandra X-ray Galaxy Catalog (CGC) of 8557 galaxy candidates in the redshift range z ~ 0.04 - 0.7, optical luminosity 1010 - 1011 Lro, and X-ray luminosity (0.5-7 keV) LX = 2x1040 - 2x1043 erg s-1. We es
Externí odkaz:
http://arxiv.org/abs/2304.13159
Autor:
Kim, Dong-Woo, Malnati, Amanda, Cassity, Alyssa, Fabbiano, Giuseppina, Galarza, Juan Rafael Martinez, O'Sullivan, Ewan
X-ray bright optically normal galaxies (XBONGs) are galaxies with X-ray luminosities consistent with those of active galactic nuclei (AGNs) but no evidence of AGN optical emission lines. Crossmatching the Chandra Source Catalog version 2 (CSC2) with
Externí odkaz:
http://arxiv.org/abs/2304.13160
Autor:
Schellenberger, Gerrit, O'Sullivan, Ewan, Giacintucci, Simona, Vrtilek, Jan, David, Laurence P., Combes, Francoise, Bîrzan, Laura, Pan, Hsi-An, Lin, Lihwai
The galaxy group NGC6338 is one of the most violent group-group mergers known to date. While the central dominant galaxies rush at each other at 1400km/s along the line of sight, with dramatic gas heating and shock fronts detected, the central gas in
Externí odkaz:
http://arxiv.org/abs/2303.08833
Autor:
Ubertosi, Francesco, Gitti, Myriam, Brighenti, Fabrizio, Olivares, Valeria, O'Sullivan, Ewan, Schellenberger, Gerrit
Publikováno v:
A&A 673, A52 (2023)
The investigation of the feedback cycle in galaxy clusters has historically been performed for systems where feedback is ongoing ("mature-feedback" clusters), that is where the central radio galaxy has inflated radio lobes, pushing aside the intraclu
Externí odkaz:
http://arxiv.org/abs/2303.04821