Infrared spectroscopy of star formation in interacting galaxies

Journal Article · Wed Oct 01 04:00:00 EDT 1986 · Astrophys. J.; (United States)

DOI:https://doi.org/10.1086/164578· OSTI ID:6597874

Beck, S C; Turner, J L; Ho, P T.P.

Brackett-alpha and Brackett-gamma lines are used to study star formation in the external, interacting galaxies NGC 5195, IC 4553, and the NGC 3690 + IC 694 system. The 10 micron continuum flux in IC 694 appears to be higher than that expected from Galactic type H II regions. Upper limits to the Brackett line emission in NGC 5195 and IC 4553 indicate that in these sources, the infrared continua are poorly correlated with the amount of observed ionized gas. In NGC 5195, the 10 micron excess is probably due to abnormally hot dust. In IC 4553, the intense far-infrared continuum suggests that either there is unusually high obscuration of the star forming regions, or that the young OB stars may produce only a small portion of the infrared luminosity. 27 references.

• Research Organization: Northeastern Univ., Boston, MA; Harvard-Smithsonian Center for Astrophysics, Cambridge, MA
• OSTI ID: 6597874
• Journal Information: Astrophys. J.; (United States), Journal Name: Astrophys. J.; (United States) Vol. 309; ISSN ASJOA
• Country of Publication: United States
• Language: English

Related Subjects

640105* -- Astrophysics & Cosmology-- Galaxies
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
BASIC INTERACTIONS
COSMIC DUST
COSMIC RADIO SOURCES
DUSTS
ELECTROMAGNETIC RADIATION
GALACTIC EVOLUTION
GALAXIES
GRAVITATIONAL INTERACTIONS
H2 REGIONS
INFRARED RADIATION
INTERACTIONS
LUMINOSITY
OPTICAL PROPERTIES
PHYSICAL PROPERTIES
RADIATIONS
SPECTROSCOPY
STAR EVOLUTION