2010ApJ...708..946S


Query : 2010ApJ...708..946S

2010ApJ...708..946S - Astrophys. J., 708, 946-964 (2010/January-2)

Spectacular X-ray tails, intracluster star formation, and ULXs in A3627.

SUN M., DONAHUE M., ROEDIGER E., NULSEN P.E.J., VOIT G.M., SARAZIN C., FORMAN W. and JONES C.

Abstract (from CDS):

We present the discovery of spectacular double X-ray tails associated with ESO 137-001 and a possibly heated X-ray tail associated with ESO 137-002, both late-type galaxies in the closest rich cluster Abell 3627. A deep Chandra observation of ESO 137-001 allows us for the first time to examine the spatial and spectral properties of such X-ray tails in detail. Besides the known bright tail that extends to ∼80 kpc from ESO 137-001, a fainter and narrower secondary tail with a similar length was surprisingly revealed, as well as some intriguing substructures in the main tail. There is little temperature variation along both tails. The widths of the secondary tail and the greater part of the main tail also remain nearly constant with the distance from the galaxy. All these results challenge the current simulations. The Chandra data also reveal 19 X-ray point sources around the X-ray tails. We identified six X-ray point sources as candidates of intracluster ultra-luminous X-ray sources with L_0.3-10 keV_ of up to 2.5x1040 erg/s. Gemini spectra of intracluster H II regions downstream of ESO 137-001 are also presented, as well as the velocity map of these H II regions that shows the imprint of ESO 137-001's disk rotation. For the first time, we unambiguously know that active star formation can happen in the cold interstellar medium (ISM) stripped by intracluster medium (ICM) ram pressure, and it may contribute a significant amount of the intracluster light. We also report the discovery of a 40 kpc X-ray tail of another late-type galaxy in A3627, ESO 137-002. Its X-ray tail seems hot, ∼2 keV (compared to ∼0.8 keV for ESO 137-001's tails). The Hα data for ESO 137-002 are also presented. We conclude that the high-pressure environment around these two galaxies is important for their bright X-ray tails and the intracluster star formation. The soft X-ray tails can reveal a great deal of the thermal history of the stripped cold ISM in mixing with the hot ICM, which is discussed along with intracluster star formation.

Abstract Copyright:

Journal keyword(s): galaxies: clusters: general - galaxies: clusters: individual: A3627 - galaxies: individual (ESO 137-001, ESO 137-002) - X-rays: galaxies

Nomenclature: Fig. 9, Table 3: [SDR2010] NN (Nos 1-19). Figs 9, 11: [SDV2007] ELONN (Nos 9-10) added.

CDS comments: Object C153 is [OKL2005] 47 in Simbad. - Galaxies G1 and G2 from 2007ApJ...671..190S are not in Simbad.

Simbad objects: 23

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Number of rows : 23
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
#notes
1 ACO 426 ClG 03 19 47.2 +41 30 47           ~ 2138 1
2 3C 84 Sy2 03 19 48.1599902040 +41 30 42.108850836   13.10 12.48 11.09   ~ 3837 3
3 UGC 6697 GiG 11 43 49.1088652488 +19 58 05.954438316 13.96 14.35 13.59 13.29   ~ 218 2
4 ACO 1367 ClG 11 44 44.6 +19 41 59           ~ 1048 1
5 LAWD 37 WD* 11 45 42.9169346379 -64 50 29.461957832 11.08 11.725 11.513 11.34 11.163 DQ 250 0
6 NGC 4388 Sy2 12 25 46.820 +12 39 43.45 11.91 11.76 11.02     ~ 1283 2
7 M 86 GiG 12 26 11.814 +12 56 45.49 10.32 9.83 8.90   7.50 ~ 1053 1
8 NAME Virgo Cluster ClG 12 26 32.1 +12 43 24           ~ 6348 0
9 NGC 4438 LIN 12 27 45.6705493536 +13 00 31.708096380 11.37 11.02 10.17     ~ 615 2
10 NGC 4848 AGN 12 58 05.5778304792 +28 14 33.253619100   14.2   13.53   ~ 188 0
11 LEDA 126817 GiC 12 58 42.589 +27 45 37.78           ~ 50 0
12 ACO 1656 ClG 12 59 48.7 +27 58 50           ~ 4577 2
13 ACO 1689 ClG 13 11 29.5 -01 20 28           ~ 1086 0
14 [RS2005] ACO 2125 481 GiC 15 41 09.74 +66 15 45.0           ~ 23 0
15 ACO 2125 ClG 15 41 14.1 +66 15 57           ~ 121 1
16 ESO 137-1 G 16 13 27.305 -60 45 50.59   14.84   13.87   ~ 107 0
17 ESO 137-2 GiG 16 13 35.651 -60 51 54.60   13.75   12.43   ~ 40 0
18 ACO 3627 ClG 16 14 22.5 -60 52 07           ~ 278 2
19 ESO 137-6 GiG 16 15 03.864 -60 54 26.14   13.08 12.83 11.33   ~ 101 0
20 CD-38 10980 WD* 16 23 33.8380498896 -39 13 46.161043572 9.916 10.885 11.029 10.936 10.841 DA2 467 0
21 NGC 6872 IG 20 16 56.4025198800 -70 46 05.070595584   11.97 11.59 10.71 11.9 ~ 85 0
22 NAME Pavo Cluster ClG 20 18 14.2 -70 50 41           ~ 48 0
23 ACO 2667 ClG 23 51 39.37 -26 05 02.7           ~ 166 0

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2022.12.09-13:03:24

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