95 citations · 389 across the 15 of their papers we have counts for
15 papers
X-ray absorption lines in FUV-detected quasars: II. Cosmological density and properties of the missing baryons
Massimiliano Bonamente, David Spence, Jussi Ahoranta +3
This paper presents constraints on the cosmological density of baryons from a systematic search for O VII and O VIII absorption lines in the XMM-Newton and Chandra X-ray spectra of…
X-ray absorption lines in FUV-detected quasars: I. Sample and analysis of the XMM-Newton and Chandra data
David Spence, Massimiliano Bonamente, Jussi Ahoranta +3
This paper presents initial results of a systematic search for resonance X-ray absorption lines from H-like O VIII and He-like O VII caused by the intervening warm-hot intergalacti…
A search for the missing baryons with X--ray absorption lines towards the blazar 1ES 1553+113
D. Spence, M. Bonamente, J. Nevalainen +5
This paper presents an analysis of XMM X--ray spectra of the quasar 1ES 1553+113, in search for absorption lines from the intervening warm--hot intergalactic medium. A search for O…
Discovery of a multiphase OVI and OVII absorber in the circumgalactic/intergalactic transition region
J. Ahoranta, A. Finoguenov, M. Bonamente +4
The observational constraints on the baryon content of the WHIM rely almost entirely on FUV measurements. However, cosmological, hydrodynamical simulations predict strong correlati…
Kinematic unrest of low mass galaxy groups
G. Gozaliasl, A. Finoguenov, H. G. Khosroshahi +6
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 Evolu…
Hot WHIM counterparts of FUV OVI absorbers: Evidence in the line-of-sight towards quasar 3C 273
Jussi Ahoranta, Jukka Nevalainen, Nastasha Wijers +7
We explore the high spectral resolution X-ray data towards the quasar 3C273 to search for signals of hot ( K) X-ray-absorbing gas co-located with two established inte…
New Chandra observations of PG 1116+215 to investigate an extragalactic OVIII WHIM absorption line
Massimiliano Bonamente, Jussi Ahoranta, Jukka Nevalainen +1
This is a short AAS Research Note on the analysis of new Chandra observations of PG 1116+215, for which an extragalactic OVIII WHIM line was reported by Bonamente et al. (2016). Th…
Chandra centres for COSMOS X-ray galaxy groups: Differences in stellar properties between central dominant and offset brightest group galaxies
Ghassem Gozaliasl, Alexis Finoguenov, Masayuki Tanaka +24
We present the results of a search for galaxy clusters and groups in the square degree of the COSMOS field using all available X-ray observations from the XMM-Newton and Ch…
To be or not to be: hot WHIM absorption in the blazar PKS 2155-304 sight line?
J. Nevalainen, E. Tempel, J. Ahoranta +8
The cosmological missing baryons at z<1 most likely hide in the hot (T K) phase of the Warm Hot Intergalactic Medium (WHIM). While the hot WHIM is hard to detect d…
CHEERS: The chemical evolution RGS sample
J. de Plaa, J. S. Kaastra, N. Werner +17
The chemical yields of supernovae and the metal enrichment of the hot intra-cluster medium (ICM) are not well understood. This paper introduces the CHEmical Enrichment RGS Sample (…
Characterization of the warm--hot intergalactic medium near the Coma cluster through high--resolution spectroscopy of X Comae
M. Bonamente, J. Ahoranta, E. Tilton +2
We have analyzed all available archival XMM-Newton observations of X Comae, a bright X-ray quasar behind the Coma cluster, to study the properties of the warm-hot intergalactic med…
Observations of asymmetric velocity fields and gas cooling in the NGC 4636 galaxy group X-ray halo
Jussi Ahoranta, Alexis Finoguenov, Ciro Pinto +4
This study aims to probe the thermodynamic properties of the hot intragroup medium (IGM) plasma in the core regions of the NGC 4636 galaxy group by detailed measurements of several…
Insights into the location and dynamics of the coolest X-ray emitting gas in clusters of galaxies
Ciro Pinto, Andrew C. Fabian, Anna Ogorzalek +10
We extend our previous study of the cool gas responsible for the emission of OVII X-ray lines in the cores of clusters and groups of galaxies. This is the coolest X-ray emitting ph…
Chemical Enrichment RGS cluster sample (CHEERS): Constraints on turbulence
Ciro Pinto, Jeremy S. Sanders, Norbert Werner +6
Feedback from AGN, galactic mergers, and sloshing are thought to give rise to turbulence, which may prevent cooling in clusters. We aim to measure the turbulence in clusters of gal…
Discovery of O VII line emitting gas in elliptical galaxies
Ciro Pinto, Andrew C. Fabian, Norbert Werner +7
In the cores of ellipticals, clusters, and groups of galaxies, the gas has a cooling time shorter than 1 Gyr. It is possible to probe cooling flows through the detection of Fe XVII…