A Measurement of the Density Parameter Derived from the Evolution of Cluster X-Ray Temperatures

Henry, J. P.

doi:10.1086/310949

Cited by 172 publications

(192 citation statements)

References 46 publications

(47 reference statements)

Supporting

Mentioning

175

Contrasting

Order By: Relevance

“…They provided the first line of evidence for the existence of dark matter (Zwicky, 1933;Smith, 1936), and cluster mass-to-light ratio measurements suggested that the matter density in the universe was sub-critical (Ω m < 1) as far back as the early 1970's (see Gott et al, 1974, and references therein). The evidence for low Ω m was substantially strengthened by baryon fraction measurements Evrard, 1997), and by the discovery of massive clusters at high (z ≈ 0.8) redshift (e.g., Henry, 1997;Eke et al, 1998;Donahue et al, 1998). Today, clusters remain an important cosmological tool, capable of testing cosmology in a variety of ways.…”

Section: General Principlesmentioning

confidence: 99%

Observational probes of cosmic acceleration

et al. 2013

View full text Add to dashboard Cite

The accelerating expansion of the universe is the most surprising cosmological discovery in many decades, implying that the universe is dominated by some form of "dark energy" with exotic physical properties, or that Einstein's theory of gravity breaks down on cosmological scales. The profound implications of cosmic acceleration have inspired ambitious efforts to understand its origin, with experiments that aim to measure the history of expansion and growth of structure with percent-level precision or higher. We review in detail the four most well established methods for making such measurements: Type Ia supernovae, baryon acoustic oscillations (BAO), weak gravitational lensing, and the abundance of galaxy clusters. We pay particular attention to the systematic uncertainties in these techniques and to strategies for controlling them at the level needed to exploit "Stage IV" dark energy facilities such as BigBOSS, LSST, Euclid, and WFIRST. We briefly review a number of other approaches including redshift-space distortions, the Alcock-Paczynski effect, and direct measurements of the Hubble constant H 0 . We present extensive forecasts for constraints on the dark energy equation of state and parameterized deviations from General Relativity, achievable with Stage III and Stage IV experimental programs that incorporate supernovae, BAO, weak lensing, and cosmic microwave background data. We also show the level of precision required for clusters or other methods to provide constraints competitive with those of these fiducial programs. We emphasize the value of a balanced program that employs several of the most powerful methods in combination, both to cross-check systematic uncertainties and to take advantage of complementary information. Surveys to probe cosmic acceleration produce data sets that support a wide range of scientific investigations, and they continue the longstanding astronomical tradition of mapping the universe in ever greater detail over ever larger scales.

show abstract

Section: General Principlesmentioning

confidence: 99%

Observational probes of cosmic acceleration

et al. 2013

View full text Add to dashboard Cite

show abstract

“…The Einstein Medium-Sensitivity Survey (EMSS) has the largest areal coverage of any of these (734 deg2 above a 0.3È3.5 keV Ñux limit of 3.57 ] 10~12 ergs s~1 cm~2, falling to 40 deg2 above 1.33 ] 10~13 ergs s~1 cm~2) yielding a total of 104 clusters (Gioia et al 1990 ;Henry et al 1992). The measurement of temperatures for several of these clusters with redshifts above 0.3 (e.g., Henry 1997) Vol. 547…”

Section: Cluster Surveysmentioning

confidence: 99%

“…A great deal of attention (Henry 1997 ;Bahcall & Fan 1998 ;Eke et al 1998 ;Sadat, Blanchard, & Oukbir 1998 ;Borgani et al 1999 ;Reichart et al 1999b ;Viana & Liddle 1999 ;Blanchard et al 2000) has been paid to this issue in recent years. To date, no consensus as to the value of has ) 0 been reached, due, in large part, to the inadequacies of the cluster catalogs currently available.…”

Section: Introductionmentioning

confidence: 99%

A Serendipitous Galaxy Cluster Survey withXMM: Expected Catalog Properties and Scientific Applications

Romer

Viana

Liddle

et al. 2001

ApJ

166

199

View full text Add to dashboard Cite

This paper describes a serendipitous galaxy cluster survey that we plan to conduct with the XMM X-ray satellite. We have modeled the expected properties of such a survey for three di †erent cosmological models, using an extended Press-Schechter formalism combined with a detailed characterization of the expected capabilities of the European Photon Imaging Camera (EPIC) camera on board XMM. We estimate that, over the 10 yr design lifetime of XMM, the EPIC camera will image a total of^800 deg2 in Ðelds suitable for the serendipitous detection of clusters of galaxies. For the presently favored low-density model with a cosmological constant, our simulations predict that this survey area would yield a catalog of more than 8000 clusters, ranging from poor to very rich systems, with around 750 detections above z \ 1. A low-density open universe yields similar numbers, though with a di †erent redshift distribution, while a critical-density universe gives considerably fewer clusters. This dependence of catalog properties on cosmology means that the proposed survey will place strong constraints on the values of and The survey would also facilitate a variety of follow-up projects, including the quan-) 0 ) " . tiÐcation of evolution in the cluster X-ray luminosity-temperature relation, the study of high-redshift galaxies via gravitational lensing, follow-up observations of the Sunyaev-Zeldovich e †ect, and foreground analyses of cosmic microwave background maps.

show abstract

“…Indeed, a number of recent studies have shown that clusters of galaxies suffer from little evolution, and their dynamical properties have remained almost unchanged since z ∼ 0.8 (Mushotzky, & Scharf 1977;Bahcall, Fan, & Cen 1997;Henry 1997;Rosati et al 1998;Vikhlinin et al 1988;etc.). This essentially justifies the employment of the Jeans equation for X-ray emitting gas in the lensing clusters at intermediate redshifts.…”

Section: Strong Lensing: Overestimates Cluster Mass ?mentioning

confidence: 99%

A comparison of different cluster mass estimates: consistency or discrepancy?

Chiueh

Fang

et al. 1998

Monthly Notices of the Royal Astronomical Society

View full text Add to dashboard Cite

Rich and massive clusters of galaxies at intermediate redshift are capable of magnifying and distorting the images of background galaxies. A comparison of different mass estimators among these clusters can provide useful information about the distribution and composition of cluster matter and their dynamical evolution. Using a hitherto largest sample of lensing clusters drawn from literature, we compare the gravitating masses of clusters derived from the strong/weak gravitational lensing phenomena, from the X-ray measurements based on the assumption of hydrostatic equilibrium, and from the conventional isothermal sphere model for the dark matter profile characterized by the velocity dispersion and core radius of galaxy distributions in clusters. While there is an excellent agreement between the weak lensing, X-ray and isothermal sphere model determined cluster masses, these methods are likely to underestimate the gravitating masses enclosed within the central cores of clusters by a factor of 2-4 as compared with the strong lensing results. Such a mass discrepancy has probably arisen from the inappropriate applications of the weak lensing technique and the hydrostatic equilibrium hypothesis to the central regions of clusters as well as an unreasonably large core radius for both luminous and dark matter profiles. Nevertheless, it is pointed out that these cluster mass estimators may be safely applied on scales greater than the core sizes. Namely, the overall clusters of galaxies at intermediate redshift can still be regarded as the dynamically relaxed systems, in which the velocity dispersion of galaxies and the temperature of X-ray emitting gas are good indicators of the underlying gravitational potentials of clusters.

show abstract

A Measurement of the Density Parameter Derived from the Evolution of Cluster X-Ray Temperatures

Cited by 172 publications

References 46 publications

Observational probes of cosmic acceleration

Observational probes of cosmic acceleration

A Serendipitous Galaxy Cluster Survey withXMM: Expected Catalog Properties and Scientific Applications

A comparison of different cluster mass estimates: consistency or discrepancy?

Contact Info

Product

Resources

About