Five-band study of spiral galaxies - X-ray, optical, near- and far-infrared, and radio continuum correlations

Journal Article · Fri Jan 01 04:00:00 EST 1988 · Astrophys. J.; (United States)

DOI:https://doi.org/10.1086/165934· OSTI ID:5275448

Fabbiano, G; Gioia, I M; Trinchieri, G

A statistical analysis is given of the relationships between global emission properties of spiral galaxies, including the radio continuum, far-infared, near-infrared H-band, optical (B), and X-ray emission. Different properties are observed in early-type and in late-type spiral galaxies, which can be ascribed to the presence of prominent bulges in the former. In late-type spirals, the statistical properties of the emission at different wavelengths are consistent with a common disk/arm origin. The power-law exponents of the correlations are consistent with a steeper IMF in low-luminosity galaxies and with the presence of an obscured starburst component in high-luminosity galaxies. The strongest correlation of the radio continuum luminosity with any other variable is with the far-infrared, suggesting that the radio emission is disjoint from the older low-mass stellar component. 47 references.

• Research Organization: Harvard-Smithsonian Center for Astrophysics, Cambridge, MA (USA)
• OSTI ID: 5275448
• Journal Information: Astrophys. J.; (United States), Journal Name: Astrophys. J.; (United States) Vol. 324; ISSN ASJOA
• Country of Publication: United States
• Language: English

Related Subjects

640105* -- Astrophysics & Cosmology-- Galaxies
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
CONFIGURATION
ELECTROMAGNETIC RADIATION
GALACTIC EVOLUTION
GALAXIES
INFRARED SPECTRA
LUMINOSITY
MATHEMATICS
OPTICAL PROPERTIES
PHYSICAL PROPERTIES
RADIATIONS
RADIOWAVE RADIATION
SPECTRA
SPIRAL CONFIGURATION
STATISTICS
VISIBLE SPECTRA
X-RAY SPECTRA