SHOCKS AND BUBBLES IN A DEEP CHANDRA OBSERVATION OF THE COOLING FLOW CLUSTER ABELL 2052

被引：51

作者：

Blanton, E. L. ^{[1
]}

Randall, S. W. ^{[2
]}

Douglass, E. M. ^{[1
]}

Sarazin, C. L. ^{[3
]}

Clarke, T. E. ^{[4
,5
]}

McNamara, B. R. ^{[2
,6
,7
]}

机构：

[1] Boston Univ, Inst Astrophys Res, Boston, MA 02215 USA

[2] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA

[3] Univ Virginia, Dept Astron, Charlottesville, VA 22904 USA

[4] USN, Res Lab, Washington, DC 20375 USA

[5] Interferometrics Inc, Herndon, VA 20171 USA

[6] Univ Waterloo, Dept Phys & Astron, Waterloo, ON N2L 2G1, Canada

[7] Perimeter Inst Theoret Phys, Waterloo, ON N2L 2Y5, Canada

来源：

ASTROPHYSICAL JOURNAL LETTERS | 2009年 / 697卷 / 02期

基金：

美国国家航空航天局;

关键词：

cooling flows; galaxies: clusters: general; galaxies: clusters: individual (A2052); intergalactic medium; radio continuum: galaxies; X-rays: galaxies: clusters; RAY-EMITTING GAS; X-RAY; PERSEUS CLUSTER; VORONOI TESSELLATIONS; INTRACLUSTER MEDIUM; GALAXY CLUSTERS; RADIO LOBES; HYDRA-A; ROSAT; TEMPERATURE;

D O I：

10.1088/0004-637X/697/2/L95

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present results from a deep Chandra observation of Abell 2052. A2052 is a bright, nearby, cooling flow cluster, at a redshift of z = 0.035. Concentric surface brightness discontinuities are revealed in the cluster center, and these features are consistent with shocks driven by the active galactic nucleus (AGN), both with Mach numbers of approximately 1.2. The southern cavity in A2052 now appears to be split into two cavities with the southernmost cavity likely representing a ghost bubble from earlier radio activity. There also appears to be a ghost bubble present to the NW of the cluster center. The cycle time measured for the radio source is t approximate to 2 x 10(7) yr using either the shock separation or the rise time of the bubbles. The energy deposited by the radio source, including a combination of direct shock heating and heating by buoyantly rising bubbles inflated by the AGN, can offset the cooling in the core of the cluster.

引用

页码：L95 / L98

页数：4

共 29 条

[21] CHANDRA'S VIEW OF THE RAM PRESSURE STRIPPED GALAXY M86 [J].

Randall, S. ;

Nulsen, P. ;

Forman, W. R. ;

Jones, C. ;

Machacek, M. ;

Murray, S. S. ;

Maughan, B. .

ASTROPHYSICAL JOURNAL, 2008, 688 (01) :208-223

[22] Shocks and sonic booms in the intracluster medium: X-ray shells and radio galaxy activity [J].

Reynolds, CS ;

Heinz, S ;

Begelman, MC .

ASTROPHYSICAL JOURNAL, 2001, 549 (02) :L179-L182

[23] X-ray and radio interactions in the cores of cooling flow clusters [J].

Rizza, E ;

Loken, C ;

Bliton, M ;

Roettiger, K ;

Burns, JO ;

Owen, FN .

ASTRONOMICAL JOURNAL, 2000, 119 (01) :21-31

[24] Isothermal shocks in Abell 2199 and 2A 0335+096? [J].

Sanders, J. S. ;

Fabian, A. C. .

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2006, 371 (01) :L65-L69

[25] Chandra temperature and metallicity maps of the Perseus cluster core [J].

Schmidt, RW ;

Fabian, AC ;

Sanders, JS .

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2002, 337 (01) :71-78

[26] An investigation of cooling flows and general cluster properties from an X-ray image deprojection analysis of 207 clusters of galaxies [J].

White, DA ;

Jones, C ;

Forman, W .

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 1997, 292 (02) :419-467

[27] Deconvolution of ASCA X-ray data -: II.: Radial temperature and metallicity profiles for 106 galaxy clusters [J].

White, DA .

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2000, 312 (03) :663-688

[28] XMM-Newton and Chandra observations of Abell 2626:: Interacting radio jets and cooling core with jet precession? [J].

Wong, Ka-Wah ;

Sarazin, Craig L. ;

Blanton, Elizabeth L. ;

Reiprich, Thomas H. .

ASTROPHYSICAL JOURNAL, 2008, 682 (01) :155-174

[29] 3C 317 - AN AMORPHOUS RADIO-SOURCE IN THE COOLING FLOW CLUSTER ABELL-2052 [J].

ZHAO, JH ;

SUMI, DM ;

BURNS, JO ;

DURIC, N .

ASTROPHYSICAL JOURNAL, 1993, 416 (01) :51-&

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