2000ApJ...530..680T

Query : 2000ApJ...530..680T

2000ApJ...530..680T - Astrophys. J., 530, 680-687 (2000/February-3)

An X-ray and optical study of matter distribution in the galaxy cluster A2319.

TREVESE D., CIRIMELE G. and DE SIMONE M.

Abstract (from CDS):

A new analysis of velocity distribution, optical photometry, and X-ray surface brightness from ROSAT Position Sensitive Proportional Counter data of the galaxy cluster A2319 is presented. The temperature profile recently derived from ASCA data by Markevitch is taken into account. A method to check the hydrostatic model in the presence of a temperature gradient is proposed. Consistency of the hydrostatic isothermal model and the explanation of the ``β-discrepancy'' are discussed. Galaxy and gas density profiles of the main component A2319A are derived, allowing for the effect of the secondary component A2319B. The inadequacy of a polytropic model, which would produce a binding mass decrease with respect to the isothermal β-model, is discussed. A simple interpolation of the temperature profile provides instead an increase of the binding mass and a lower baryon fraction, thus mitigating the ``baryon catastrophe.'' Assuming as typical the value f_b~0.2, a comparison with the most recent estimate of Ω^nucl_b implies for the cosmological parameter Ω₀≲0.4.

Abstract Copyright: ∼

Journal keyword(s): Cosmology: Dark Matter - galaxies: clusters: individual (A2319) - Galaxies: Photometry - Galaxies: Intergalactic Medium - X-Rays: Galaxies

Simbad objects: 1

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Number of rows : 1

N	Identifier	Otype	ICRS (J2000) RA	ICRS (J2000) DEC	Mag U	Mag B	Mag V	Mag R	Mag I	Sp type	#ref 1850 - 2026	#notes
1	ACO 2319	ClG	19 21 14.0	+43 56 57						~	495	1

Query : 2000ApJ...530..680T

Basic data :

ACO 2319 -- Cluster of Galaxies
Other object types:	`X (2012ApJS,2A,...)`, `ClG (2014MNRAS,ACO,...)`, `C?G (2014A&A)`, `gam (INTREF)`
ICRS coord. (ep=J2000) :	`19 21 14.0 +43 56 57 (X-ray) [ 5000 5000 90 ] E 2022A&A...661A..38P`
FK4 coord. (ep=B1950 eq=1950) :	`19 19 40.6 +43 51 13 [ 5000 5000 90 ]`
Gal coord. (ep=J2000) :	`075.6961 +13.4970 [ 5000 5000 90 ]`
Radial velocity / Redshift / cz :	`V(km/s) 16291 [~] / z(~) 0.0559 [~] / cz 16758 [~] D 1998A&A...338..813W`
Angular size (arcmin):	`16.0 16.0 ~ (Rad) D` `2015ApJ...813...77Y`

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Hierarchy : number of linked objects
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`ACO 2319`	`FR 109`	`PBC J1920.9+4358`	`2U 1926+43`
`2A 1919+438`	`1H 1919+438`	`PSZ1 G075.71+13.51`	`3U 1921+43`
`3A 1919+438`	`H 1918+43`	`PSZ2 G075.71+13.51`	`4U 1919+44`
`BAX 290.1889+43.9619`	`HMS 1919+4351`	`PSZRX G075.70+13.51`	`WBL 661`
`CIZA J1921.1+4357`	`INTREF 973`	`RXC J1921.1+4357`	`XSS J19210+4359`
`ClG 1919.2+4353`	`1M 1921+434`	`SRGA J192114.0+435657`	`[BAG2012] 290.2788+43.9628`
`2E 4234`	`2MAXI J1921+440`	`SWIFT J1921.1+4356`
`2E 1919.6+4351`	`MCXC J1921.1+4357`	`SWIFT J1920.9+4357`

References (495 between 1850 and 2026) (Total 495)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).

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External archives :

Archive data at HEASARC - High-Energy Astrophysics Science Archive Research Center

Data at NED - NASA/IPAC Extragalactic Database : ACO 2319

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ACO 2319 2E 4234 RXC J1921.1+4357

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