A single rotating disk of H I in Arp 299 (NGC 3690/IC 694)

Journal Article · Wed Nov 01 04:00:00 EST 1989 · Astrophysical Journal; (USA)

DOI:https://doi.org/10.1086/168052· OSTI ID:7253560

Stanford, S A; Wood, D O.S. ^[1]

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1. Wisconsin Univ., Madison (USA) Harvard-Smithsonian Center for Astrophysics, Cambridge, MA (USA)

Ten-arcsec resolution 21-cm spectral line observations of the merging galaxies NGC 3690/IC 694 are presented. Strong H I absorption was seen at three sites of activity identified previously by Gehrz, Sramek, and Weedman (1983), and regions of weak emission were found extending from the optical edges of the system. The absorption data set lower limits on the neutral hydrogen mass contained in the nuclei and in the overlap region. The emission shows evidence of a single rotating disk of H I surrounding the system out to a radius twice that of the optical radius. This single H I disk morphology indicates that IC 694 and NGC 3690 are coverage of Arp 299 which now spans from the UV to radio regimes, thus making it possible to compare the distribution and kinematics of atomic hydrogen with previous observations, and offering new insight into the effect of a collision on a progenitor's interstellar medium. 12 refs.

• OSTI ID: 7253560
• Journal Information: Astrophysical Journal; (USA), Journal Name: Astrophysical Journal; (USA) Vol. 346; 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
ABSORPTION SPECTRA
BASIC INTERACTIONS
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CHALCOGENIDES
COLLISIONS
COSMIC RADIO SOURCES
GALAXIES
GALAXY NUCLEI
GRAVITATIONAL INTERACTIONS
H1 REGIONS
INTERACTIONS
INTERSTELLAR SPACE
MASS
MORPHOLOGY
MOTION
OXIDES
OXYGEN COMPOUNDS
PARTICLE KINEMATICS
ROTATION
SPACE
SPECTRA
SPECTROSCOPY
STARS