H I, H II, and R-Band Observations of a Galactic Merger Sequence
J. E. Hibbard,J. H. van Gorkom +1 more
TLDR
In this paper, high-quality aperture synthesis observations of the neutral hydrogen distribution in a sample of five galactic systems believed to be involved in progressive stages of merging are presented, including Arp295, NGC4676, NCL4, NCC4, and NGC7252.Abstract:
We present high-quality aperture synthesis observations of the neutral hydrogen distribution in a sample of five galactic systems believed to be involved in progressive stages of merging: Arp295, NGC4676, NGC520, NGC3921, and NGC7252. These data are supplemented by wide-field images taken through a narrow band Halpha filter, and by deep R-band surface photometry. In the early stages, large amounts of HI exist within the galactic disks and star formation is widespread. The ionized gas emission often takes on the appearance of plumes and arcs emanating from the nuclear regions, which are presumably the sites of interaction induced starbursts. In the final stages there is little if any HI within the remnant bodies, and tidal material is seen moving inward. This suggests that these remnants will evolve into elliptical galaxies in their atomic gas contents as well as their photometric properties. However the observations of NGC520 reveal an extensive rotating gaseous disk, suggesting that perhaps some mergers will not destroy the atomic gas disks of the progenitors. Overall, large quantities of both gas and starlight are seen at large radii. Since this material evolves on very long time scales, it may leave observable signatures for many Gyr.read more
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Journal ArticleDOI
Luminous infrared galaxies
David B. Sanders,I. F. Mirabel +1 more
TL;DR: At the highest luminosities (Lir > 1012 ), nearly all objects appear to be advanced mergers powered by a mixture of circumnuclear starburst and active galactic nucleus energy sources, both of which are fueled by an enormous concentration of molecular gas that has been funneled into the merger nucleus as discussed by the authors.
Journal ArticleDOI
Structure and formation of elliptical and spheroidal galaxies
TL;DR: In this paper, surface photometry of all known elliptical galaxies in the Virgo cluster is combined with published data to derive composite profiles of brightness, ellipticity, position angle, isophote shape, and color over large radius ranges.
Journal ArticleDOI
OUTFLOWS IN INFRARED-LUMINOUS STARBURSTS AT z < 0.5. II. ANALYSIS AND DISCUSSION
TL;DR: In this paper, the authors performed an absorption line survey of outflowing gas in 78 starburst-dominated, infrared-luminous galaxies and found that superwinds are found in almost all of them.
Journal ArticleDOI
The 1000 Brightest HIPASS Galaxies: H I Properties
Baerbel Koribalski,Lister Staveley-Smith,Virginia A. Kilborn,Virginia A. Kilborn,Stuart D. Ryder,Renee C. Kraan-Korteweg,Emma V. Ryan-Weber,Emma V. Ryan-Weber,Ron Ekers,Helmut Jerjen,P. A. Henning,Mary E. Putman,Martin Zwaan,Martin Zwaan,W. J. G. de Blok,W. J. G. de Blok,Mark Calabretta,M. J. Disney,Robert F. Minchin,R. Bhathal,P. J. Boyce,Michael J. Drinkwater,Kenneth C. Freeman,Brad K. Gibson,A. J. Green,R. F. Haynes,S. Juraszek,Michael Kesteven,P. M. Knezek,Stacy Mader,M. Marquarding,Martin Meyer,J. R. Mould,Tom Oosterloo,J. O’Brien,J. O’Brien,R. M. Price,Elaine M. Sadler,A. C. Schröder,Ian M. Stewart,F. Stootman,M. Waugh,M. Waugh,B. E. Warren,B. E. Warren,Rachel L. Webster,Alan E. Wright +46 more
TL;DR: The HIPASS Bright Galaxy Catalog (BGC) as mentioned in this paper contains 1000 H I brightest galaxies in the southern sky as obtained from the H i Parkes All-Sky Survey ( HIPASS).
Journal ArticleDOI
The Recent and Continuing Assembly of Field Elliptical Galaxies by Red Mergers
TL;DR: In this article, the authors present a study of tidal debris associated with 126 nearby red galaxies, selected from the 1.2 deg2 Multiwavelength Survey by Yale-Chile and the 9.3 deg2 NOAO Deep Wide-Field Survey.
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The interstellar medium
S. A. Kaplan,S. B. Pikelner +1 more
TL;DR: De Gruyter as discussed by the authors uses the recommended retail price (RRP) as the retail price for books in the US and GBP for orders placed in Great Britain only, unless otherwise indicated.