other query modes : |
Identifier query |
Coordinate query |
Criteria query |
Reference query |
Basic query |
Script submission |
TAP |
Output options |
Object types |
Help |
2006MNRAS.371...93W - Mon. Not. R. Astron. Soc., 371, 93-107 (2006/September-1)
Integral field spectroscopy of Hα emission in cooling flow cluster cores: disturbing the molecular gas reservoir.
WILMAN R.J., EDGE A.C. and SWINBANK A.M.
Abstract (from CDS):
The Hα emission shows a variety of disturbed morphologies, ranging from smooth but distorted to clumpy and filamentary, with velocity gradients and splittings of several hundred km/s on spatial scales of 20kpc or more. Despite the small sample size, there are some generic features. The most disturbed Hα emission appears to be associated with secondary galaxies within 10-20kpc (projected) of the central galaxy and close in velocity to the Hα. The global Hα kinematics match those of the CO(1-0) emission in single-dish data. The [Nii]/Hα, [Sii]/Hα and [Oi]/Hα ratios vary little with position, local Hα surface brightness or between clusters.
We propose that the Hα and CO emission arise in molecular clouds heated by a starburst, and that the latter has been triggered by interaction with a secondary galaxy. Such CO emission is known to trace massive (>1010M☉) compact (<20kpc) reservoirs of cool molecular gas, and it is plausible that an infalling galaxy would disturb this gas, distorting the Hα morphology and initiating widespread star formation. We also examine the role of cloud-cloud collisions in the undisturbed molecular gas reservoir, and suggest that they might be an important source of excitation for the emission-line gas in the cores of lower Hα luminosity clusters with less intense star formation.
Abstract Copyright: 2006 The Authors. Journal compilation © 2006 RAS
Journal keyword(s): galaxies: clusters: individual: A1664 - galaxies: clusters: individual: A1835 - galaxies: clusters: individual: A2204 - galaxies: clusters: individual: ZW8193 - cooling flows - intergalactic medium
CDS comments: Fig. 2 and 13 : Regions B1-4 and P1-4 not in simbad. Fig. 2 : Galaxy #1 not identified. Fig. 12 Objects #1 to 4 not identified exept #3 = [ZEH2003] RX J1632.7+0534 10.
Simbad objects: 11
To bookmark this query, right click on this link: simbad:2006MNRAS.371...93W and select 'bookmark this link' or equivalent in the popup menu