355 citations · 2.6k across the 82 of their papers we have counts for
28 papers · 1 filter
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 emission in IllustrisTNG circum-cluster environments. II -- Possible origins of the soft X-ray excess emission
Celine Gouin, Daniela Galárraga-Espinosa, Massimiliano Bonamente +9
An excess of soft X-ray emission (0.2-1 keV) above the contribution from the hot intra-cluster medium (ICM) has been detected in a number of galaxy clusters, including the Coma clu…
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…
Soft X-ray emission from warm gas in IllustrisTNG circum-cluster environments
Celine Gouin, Massimiliano Bonamente, Daniela Galarraga-Espinosa +2
Context. Whereas X-ray clusters are extensively used for cosmology, their idealistic modelling, through the hypotheses of spherical symmetry and hydrostatic equilibrium, are more a…
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…
The Scaling Relation between Galaxy Luminosity and WHIM Density from EAGLE Simulations with application to SDSS data
Patrick Holt, Toni Tuominen, Jukka Nevalainen +4
This paper presents an updated scaling relation between the optical luminosity density (LD) of galaxies in the band and the density of the warm-hot intergalactic medium (WHIM)…
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…
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…
The galaxy group NGC2563
Andrea Morandi, Ming Sun, John Mulchaey +2
We present a study of the hot intragroup medium (hIGM) of the galaxy group NCG2563. The mosaic observations, with a total exposure time of ~430 ks, allow the ga…
A possible Chandra and Hubble Space Telescope detection of extragalactic WHIM towards PG 1116+215
M. Bonamente, J. Nevalainen, E. Tilton +4
(Abridged) We have analyzed Chandra LETG and XMM-Newton RGS spectra towards the z=0.177 quasar PG 1116+215, a sightline that is rendered particularly interesting by the HST detecti…
Hydrostatic and Caustic Mass Profiles of Galaxy Clusters
Ben J. Maughan, Paul A. Giles, Kenneth J. Rines +4
We compare X-ray and caustic mass profiles for a sample of 16 massive galaxy clusters. We assume hydrostatic equilibrium in interpreting the X-ray data, and use large samples of cl…
Missing baryons traced by the galaxy luminosity density in the large-scale WHIM filaments
J. Nevalainen, E. Tempel, L. J. Liivamägi +9
We propose a new approach to the missing baryons problem. Building on the common assumption that the missing baryons are in the form of the Warm Hot Intergalactic Medium (WHIM), we…
Finding and characterising WHIM structures using the luminosity density method
J. Nevalainen, L. J. Liivamagi, E. Tempel +12
We have developed a new method to approach the missing baryons problem. We assume that the missing baryons reside in a form of Warm Hot Intergalactic Medium, i.e. the WHIM. Our met…
Chandra Measurements of a Complete Sample of X-ray Luminous Galaxy Clusters: the Gas Mass Fraction
David Landry, Massimiliano Bonamente, Paul Giles +2
We present Chandra X-ray measurements of the gas mass fraction out to r500 for a complete sample of the 35 most luminous clusters from the Brightest Cluster Sample and the Extended…
Chandra X-ray observations of Abell 1835 to the virial radius
M. Bonamente, D. Landry, B. Maughan +3
We report the first Chandra detection of emission out to the virial radius in the cluster Abell 1835 at z=0.253. Our analysis of the soft X-ray surface brightness shows that emissi…
CARMA Measurements of the Sunyaev-Zel'dovich Effect in RXJ1347.5-1145
Thomas J. Plagge, Daniel P. Marrone, Zubair Abdulla +10
We demonstrate the Sunyaev-Zel'dovich (SZ) effect imaging capabilities of the Combined Array for Research in Millimeter-wave Astronomy (CARMA) by presenting an SZ map of the galaxy…
Joint analysis of X-ray and Sunyaev Zel'dovich observations of galaxy clusters using an analytic model of the intra-cluster medium
Nicole Hasler, Esra Bulbul, Massimiliano Bonamente +19
We perform a joint analysis of X-ray and Sunyaev Zel'dovich (SZ) effect data using an analytic model that describes the gas properties of galaxy clusters. The joint analysis allows…
Comparison of Pressure Profiles of Massive Relaxed Galaxy Clusters using Sunyaev-Zel'dovich and X-ray Data
Massimiliano Bonamente, Nicole Hasler, Esra Bulbul +19
We present Sunyaev-Zel'dovich (SZ) effect observations of a sample of 25 massive relaxed galaxy clusters observed with the Sunyaev-Zel'dovich Array (SZA), an 8-element interferomet…
LoCuSS: The Sunyaev-Zel'dovich Effect and Weak Lensing Mass Scaling Relation
Daniel P. Marrone, Graham P. Smith, Nobuhiro Okabe +22
We present the first weak-lensing-based scaling relation between galaxy cluster mass, M_wl, and integrated Compton parameter Y_sph. Observations of 18 galaxy clusters at z~0.2 were…
Supermodel Analysis of the Hard X-Ray Excess in the Coma Cluster
Roberto Fusco-Femiano, Mauro Orlandini, Massimiliano Bonamente +1
The Supermodel provides an accurate description of the thermal contribution by the hot intracluster plasma which is crucial for the analysis of the hard excess. In this paper the t…
South Pole Telescope Detections of the Previously Unconfirmed Planck Early SZ Clusters in the Southern Hemisphere
K. Story, K. A. Aird, K. Andersson +60
We present South Pole Telescope (SPT) observations of the five galaxy cluster candidates in the southern hemisphere which were reported as unconfirmed in the Planck Early Sunyaev-Z…
Sunyaev Zel'dovich Effect Observations of Strong Lensing Galaxy Clusters: Probing the Over-Concentration Problem
Megan B. Gralla, Keren Sharon, Michael D. Gladders +23
We have measured the Sunyaev Zel'dovich (SZ) effect for a sample of ten strong lensing selected galaxy clusters using the Sunyaev Zel'dovich Array (SZA). The SZA is sensitive to st…
Galaxy Clusters at z>=1: Gas Constraints from the Sunyaev-Zel'dovich Array
T. L. Culverhouse, M. Bonamente, E. Bulbul +20
We present gas constraints from Sunyaev-Zel'dovich (SZ) effect measurements in a sample of eleven X-ray and infrared (IR) selected galaxy clusters at z >=1, using data from the Sun…
An Analytic Model of the Physical Properties of Galaxy Clusters
G. Esra Bulbul, Nicole Hasler, Massimiliano Bonamente +1
We introduce an analytic model of the diffuse intergalactic medium in galaxy clusters based on a polytropic equation of state for the gas in hydrostatic equilibrium with the cluste…