2009ApJ...693...43G

Query : 2009ApJ...693...43G

2009ApJ...693...43G - Astrophys. J., 693, 43-55 (2009/March-1)

X-ray cavities, filaments, and cold fronts in the core of the galaxy group NGC 5044.

GASTALDELLO F., BUOTE D.A., TEMI P., BRIGHENTI F., MATHEWS W.G. and ETTORI S.

Abstract (from CDS):

We present a two-dimensional analysis of the bright nearby galaxy group NGC 5044 using the currently available Chandra and XMM data. In the inner 10 kpc, a pair of cavities are evident together with a set of bright X-ray filaments. If the cavities are interpreted as gas displaced by relativistic plasma inflated by an active galactic nucleus, even in the absence of extended 1.4 GHz emission, this would be consistent with a recent outburst as also indicated by the extent of dust and Hα emission. The soft X-ray filaments coincident with Hα and dust emission are cooler than those which do not correlate with optical and infrared emission. We suggest that dust-aided cooling contributes to form warm (T ∼ 104 K) gas, emitting Hα radiation. At 31 kpc and 67 kpc, a pair of cold fronts are present, indicative of sloshing due to a dynamical perturbation caused by accretion of a less-massive group, also suggested by the peculiar velocity of the brightest galaxy NGC 5044 with respect to the mean group velocity.

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Journal keyword(s): cooling flows - galaxies: clusters: general - galaxies: clusters: individual: NGC 5044 - X-rays: galaxies: clusters

Simbad objects: 17

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Number of rows : 17
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 ZwCl 0120+3300 ClG 01 23 36.9 +33 15 03           ~ 80 0
2 NGC 507 rG 01 23 39.950 +33 15 22.22   13.0       ~ 459 1
3 NGC 741 rG 01 56 23.2 +05 37 35   13.2       ~ 309 2
4 IC 1860 Sy1 02 49 33.8577739752 -31 11 21.664508208   13.00   11.47   ~ 82 1
5 NGC 1275 Bla 03 19 48.1599902040 +41 30 42.108850836   13.10 12.48 11.09   ~ 4243 3
6 NAME Per Region reg 03 37 00.0 +31 15 00           ~ 296 0
7 NGC 1404 rG 03 38 51.917 -35 35 39.81 11.53 10.69 10.00 9.03   ~ 787 1
8 ACO 496 ClG 04 33 40.8 -13 14 34           ~ 728 2
9 NAME NGC 4073 Group GrG 12 04 44.08 +01 48 40.9     13.53     ~ 292 0
10 M 87 AGN 12 30 49.42338414 +12 23 28.0436859 10.16 9.59 8.63   7.49 ~ 7815 3
11 M 89 Sy2 12 35 39.80733343 +12 33 22.8308657 11.29 10.73 9.75     ~ 1037 2
12 NGC 4636 LIN 12 42 49.8333280080 +02 41 15.951929028   12.62 11.84     ~ 1156 1
13 HCG 62 CGG 12 53 05.6 -09 12 21           ~ 313 0
14 NAME NGC 5044 Group GrG 13 14 22.7 -16 32 04           ~ 186 0
15 NGC 5044 BiC 13 15 23.9607836592 -16 23 07.547751744   11.9   10.74   ~ 531 0
16 NGC 5846 rG 15 06 29.253 +01 36 20.29   11.9   9.74   ~ 891 2
17 ACO 2597 ClG 23 25 19.70 -12 07 27.7           ~ 572 0

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