IRAS point sources in the Ophiuchus molecular cloud complex - optical identification

Journal Article · Sat Apr 01 04:00:00 EST 1989 · Astron. J.; (United States)

DOI:https://doi.org/10.1086/115050· OSTI ID:5841749

Ichikawa, Takashi; Nishida, Minoru

An attempt was made to optically identify 1433 IRAS point sources in a 170 sq deg area of the Ophiuchus molecular cloud complex extending about 45 pc from rho Oph to the north. Among 652 sources having fluxes of high or middle quality at 12 or 25-micron wavelengths, 577 are identified with stars, four with galaxies, while 71 have no optical candidates to 17 or 20 mag at I or R bands. With respect to the sources only detected at 60 and/or 100 microns, 33 are associated with galaxies and the remainder may be infrared cirrus. On the basis of the detailed study on the near-infrared Schmidt plates to 17 mag in a 5 x 5 deg area centered on rho Oph, statistical properties of IRAS point sources are discussed with emphasis on the correlation with the molecular clouds, making this study useful for future studies of the global star formation in the cloud complex at near infrared or other wavelengths. 41 refs.

• Research Organization: Kyoto Univ. (Japan)
• OSTI ID: 5841749
• Journal Information: Astron. J.; (United States), Journal Name: Astron. J.; (United States) Vol. 97; ISSN ANJOA
• Country of Publication: United States
• Language: English

Related Subjects

640102 -- Astrophysics & Cosmology-- Stars & Quasi-Stellar
Radio & X-Ray Sources
640105* -- Astrophysics & Cosmology-- Galaxies
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
COSMIC GASES
DISTRIBUTION
ELECTROMAGNETIC RADIATION
ERUPTIVE VARIABLE STARS
FLUIDS
GALAXIES
GASES
INFRARED RADIATION
INTERSTELLAR SPACE
POINT SOURCES
PROTOSTARS
RADIATION SOURCES
RADIATIONS
SPACE
SPATIAL DISTRIBUTION
STAR CLUSTERS
STAR EVOLUTION
STARS
T TAURI STARS
VARIABLE STARS
VISIBLE RADIATION