Vacuum ultraviolet imagery of the Virgo Cluster region. II. Total far-ultraviolet flux of galaxies

Journal Article · Thu Nov 01 04:00:00 EST 1990 · Astrophysical Journal; (USA)

DOI:https://doi.org/10.1086/169355· OSTI ID:6163609

Kodaira, K; Watanabe, T; Onaka, T; Tanaka, W ^[1]

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1. National Astronomical Observatory, Mitaka (Japan) Tokyo Univ. (Japan)

The total flux in the far-ultraviolet region around 150 nm was measured for more than 40 galaxies in the central region of the Virgo Cluster, using two imaging telescopes on board a sounding rocket. The observed far-ultraviolet flux shows positive correlations with the H I 21 cm flux and the far-infrared flux for spiral galaxies, and with the X-ray flux and the radio continuum flux for elliptical galaxies. The former correlations of spiral galaxies are interpreted in terms of star formation activity, which indicates substantial depletion in the Virgo galaxies in accordance with the H I stripping. The latter correlations of elliptical galaxies indicate possible far-ultraviolet sources of young population, in addition to evolved hot stars. Far-ultraviolet fluxes from two dwarf elliptical galaxies were obtained tentatively, indicating star formation activity in elliptical galaxies. A high-resolution UV imagery by HST would be effective to distinguish the young population and the old population in elliptical galaxies. 81 refs.

• OSTI ID: 6163609
• Journal Information: Astrophysical Journal; (USA), Journal Name: Astrophysical Journal; (USA) Vol. 363; ISSN ASJOA; ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

640105* -- Astrophysics & Cosmology-- Galaxies
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
CONFIGURATION
CORRELATIONS
COSMIC RADIO SOURCES
ELECTROMAGNETIC RADIATION
ELLIPTICAL CONFIGURATION
FAR INFRARED RADIATION
FAR ULTRAVIOLET RADIATION
GALAXIES
GALAXY CLUSTERS
H1 REGIONS
INFRARED RADIATION
IONIZING RADIATIONS
PHOTOMETRY
RADIATION FLUX
RADIATIONS
RADIOWAVE RADIATION
SPIRAL CONFIGURATION
STAR EVOLUTION
ULTRAVIOLET RADIATION
X RADIATION