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THE NARROW X-RAY TAIL AND DOUBLE H alpha TAILS OF ESO 137-002 IN A3627
Zhang, B.1,2; Sun, M.3; Ji, L.4; Sarazin, C.5; Lin, X. B.1,2; Nulsen, P. E. J.6; Roediger, E.7; Donahue, M.8; Forman, W.6; Jones, C.6; Voit, G. M.8; Kong, X.1,2
2013-11-10
Source PublicationASTROPHYSICAL JOURNAL
ISSN0004-637X
Volume777Issue:2Pages:122(13P)
Corresponding AuthorZhang, B (通讯作者) Univ Sci & Technol China, Ctr Astrophys, Hefei 230026, Anhui, Peoples R China.
AbstractWe present the analysis of a deep Chandra observation of a similar to 2L(*) late-type galaxy, ESO 137-002, in the closest rich cluster A3627. The Chandra data reveal a long (greater than or similar to 40 kpc) and narrow tail with a nearly constant width (similar to 3 kpc) to the southeast of the galaxy, and a leading edge similar to 1.5 kpc from the galaxy center on the upstream side of the tail. The tail is most likely caused by the nearly edge-on stripping of ESO 137-002's interstellar medium (ISM) by ram pressure, compared to the nearly face-on stripping of ESO 137-001 discussed in our previous work. Spectral analysis of individual regions along the tail shows that the gas throughout it has a rather constant temperature, similar to 1 keV, very close to the temperature of the tails of ESO 137-001, if the same atomic database is used. The derived gas abundance is low (similar to 0.2 solar with the single-kT model), an indication of the multiphase nature of the gas in the tail. The mass of the X-ray tail is only a small fraction (<5%) of the initial ISM mass of the galaxy, suggesting that the stripping is most likely at an early stage. However, with any of the single-kT, double-kT, and multi-kT models we tried, the tail is always "over-pressured" relative to the surrounding intracluster medium (ICM), which could be due to the uncertainties in the abundance, thermal versus non-thermal X-ray emission, or magnetic support in the ICM. The H alpha data from the Southern Observatory for Astrophysical Research show a similar to 21 kpc tail spatially coincident with the X-ray tail, as well as a secondary tail (similar to 12 kpc long) to the east of the main tail diverging at an angle of similar to 23 degrees and starting at a distance of similar to 7.5 kpc from the nucleus. At the position of the secondary H alpha tail, the X-ray emission is also enhanced at the similar to 2 sigma level. We compare the tails of ESO 137-001 and ESO 137-002, and also compare the tails to simulations. Both the similarities and differences of the tails pose challenges to the simulations. Several implications are briefly discussed.
KeywordGalaxies: Clusters: General Galaxies: Clusters: Individual (A3627) Galaxies: Individual (Eso 137-002, Eso 137-001) X-rays: Galaxies: Clusters
Subject AreaAstronomy & Astrophysics
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1088/0004-637X/777/2/122
WOS KeywordCLUSTER MAGNETIC-FIELDS ; MASSIVE GALAXY CLUSTER ; STAR-FORMATION ; VIRGO CLUSTER ; INTRACLUSTER MEDIUM ; SPIRAL GALAXIES ; COMA CLUSTER ; HOT GAS ; DISC GALAXIES ; XMM-NEWTON
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000326218800041
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Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/9785
Collection暗物质和空间天文实验室
Affiliation1.Univ Sci & Technol China, Ctr Astrophys, Hefei 230026, Anhui, Peoples R China
2.Chinese Acad Sci, USTC, Key Lab Res Galaxies & Cosmol, Beijing 100864, Peoples R China
3.Univ Alabama, Dept Phys, Huntsville, AL 35899 USA
4.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Jiangsu, Peoples R China
5.Univ Virginia, Dept Astron, Charlottesville, VA 22904 USA
6.Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA
7.Univ Hamburg, Germany Hamburger Sternwarte, D-21029 Hamburg, Germany
8.Michigan State Univ, Dept Phys & Astron, E Lansing, MI 48824 USA
Recommended Citation
GB/T 7714
Zhang, B.,Sun, M.,Ji, L.,et al. THE NARROW X-RAY TAIL AND DOUBLE H alpha TAILS OF ESO 137-002 IN A3627[J]. ASTROPHYSICAL JOURNAL,2013,777(2):122(13P).
APA Zhang, B..,Sun, M..,Ji, L..,Sarazin, C..,Lin, X. B..,...&Kong, X..(2013).THE NARROW X-RAY TAIL AND DOUBLE H alpha TAILS OF ESO 137-002 IN A3627.ASTROPHYSICAL JOURNAL,777(2),122(13P).
MLA Zhang, B.,et al."THE NARROW X-RAY TAIL AND DOUBLE H alpha TAILS OF ESO 137-002 IN A3627".ASTROPHYSICAL JOURNAL 777.2(2013):122(13P).
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