dc.contributor.author | Koekemoer, Anton | en_US |
dc.contributor.author | O'Dea, Christopher | en_US |
dc.contributor.author | Sarazin, Craig | en_US |
dc.contributor.author | McNamara, Brian | en_US |
dc.contributor.author | Donahue, Megan | en_US |
dc.contributor.author | Voit, G. Mark | en_US |
dc.contributor.author | Baum, Stefi | en_US |
dc.contributor.author | Gallimore, Jack | en_US |
dc.date.accessioned | 2006-05-17T16:30:04Z | en_US |
dc.date.available | 2006-05-17T16:30:04Z | en_US |
dc.date.issued | 1999-11-10 | en_US |
dc.identifier.citation | Astrophy.J. 525 (1999) 621-637 | en_US |
dc.identifier.issn | 1538-4365 | en_US |
dc.identifier.uri | http://hdl.handle.net/1850/1806 | en_US |
dc.description | RIT community members may access full-text via RIT Libraries licensed databases: http://library.rit.edu/databases/ | |
dc.description.abstract | We present results from detailed imaging of the centrally dominant radio elliptical
galaxy in the cooling flow cluster Abell 2597, using data obtained with the Wide Field and Planetary Camera 2 (WFPC2) on the Hubble Space Telescope (HST). This object is one of the archetypal “blue-lobed” cooling flow radio elliptical galaxies, also displaying a luminous emission-line nebula, a compact radio source, and a significant dust lane and evidence of molecular gas in its center. We show that the radio source is surrounded by a complex network of emission-line filaments, some of which display a close spatial association with the outer boundary of the radio lobes. We present a detailed analysis of the physical properties of ionized and neutral gas associated with the radio lobes, and show that their properties are strongly suggestive of direct interactions between the radio plasma and ambient gas. We resolve the blue continuum emission into a series of knots and clumps, and present evidence that these are most likely due to regions of recent star formation. We investigate several possible triggering mechanisms for the star formation, including direct interactions with the radio source, filaments condensing from the cooling flow, or the result of an interaction with a
gas-rich galaxy, which may also have been responsible for fueling the active nucleus. We
propose that the properties of the source are plausibly explained in terms of accretion of gas by the cD during an interaction with a gas-rich galaxy, which combined with the fact that this object is located at the center of a dense, high-pressure ICM can account for the high rates of star formation and the strong confinement of the radio source. | en_US |
dc.description.sponsorship | We are grateful to Stephane Charlot and Gustavo Bruzual for kindly making available their latest stellar synthesis libraries with appropriate K-corrections and magnitudes calculated in the HST filters that were used to observe this object. A. M. K. would like to thank Stefano Casertano, Brad Whitmore, and Paul Goudfrooij for a number of valuable discussions, and Andy Fruchter for helpful explanations concerning use of the DITHER package. We thank Michael Wise for his
involvement in the initial phase of the project. We also thank the anonymous referee for useful comments which helped to improve the paper. Partial support for this work was provided by NASA through grant number GO-06717.01-95A from the Space Telescope Science Institute, which is operated by AURA, Inc., under NASA contract NAS 5-26555. C. L. S. was supported in part by NASA ASCA grant NAG 5-4516 and NASA Astrophysical Theory Program grant 5-3057. | en_US |
dc.format.extent | 1463910 bytes | en_US |
dc.format.mimetype | application/pdf | en_US |
dc.language.iso | en_US | en_US |
dc.publisher | American Astronomical Society | en_US |
dc.relation.ispartofseries | vol. 525 | en_US |
dc.relation.ispartofseries | no. 2 | en_US |
dc.subject | Galaxies - clusters - individual - A2597 and PKS 2322−123 | en_US |
dc.subject | Galaxies - elliptical and lenticular | en_US |
dc.subject | Galaxies - jets | en_US |
dc.subject | Galaxies - stellar content | en_US |
dc.subject | Galaxies - structure | en_US |
dc.subject | Radio continuum - galaxies | en_US |
dc.subject | Stars - formation | en_US |
dc.title | The extended blue continuum and line emission around the Central Radio Galaxy in Abell 2597 | en_US |
dc.type | Article | en_US |
dc.identifier.url | http://dx.doi.org/10.1086/307911 | |