A search for T Tauri stars in high-latitude molecular clouds. I. IRAS sources and CCD imaging

Journal Article · Sun Jul 01 04:00:00 EDT 1990 · Astrophysical Journal; (USA)

DOI:https://doi.org/10.1086/168948· OSTI ID:6863857

Magnani, L; Caillault, J; Armus, L ^[1]

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1. Arecibo Observatory (Puerto Rico) E. O. Hulburt Center for Space Research, Washington, DC (USA) Georgia Univ., Athens (USA) Maryland Univ., College Park (USA)

Results are reported from a search for excess H-alpha emission from point sources in 19 high-Galactic-latitude molecular clouds (two dark clouds and 17 translucent clouds). A total of 111 candidate sources from the IRAS Point Source Catalog were evaluated, but most of these (except for five T Tau stars in the dark clouds) were found to be 100-micron cirrus sources, galaxies, or field stars. CCD observations of 23 ambiguous sources were obtained in the red and H-alpha bands using a CCD detector on the 0.9-m telescope at KPNO during September 1987 and February 1988: no H-alpha/R ratios more than 5 sigma above the respective field averages were found. It is concluded that significant low-mass star formation in translucent high-latitude molecular clouds is unlikely. 30 refs.

• OSTI ID: 6863857
• Journal Information: Astrophysical Journal; (USA), Journal Name: Astrophysical Journal; (USA) Vol. 357; ISSN ASJOA; ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

640102* -- Astrophysics & Cosmology-- Stars & Quasi-Stellar
Radio & X-Ray Sources
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
BALMER LINES
CHARGE-COUPLED DEVICES
COSMIC GASES
ELECTROMAGNETIC RADIATION
ERUPTIVE VARIABLE STARS
FLUIDS
GALAXIES
GASES
IDENTIFICATION SYSTEMS
INFRARED RADIATION
INTERSTELLAR SPACE
MILKY WAY
PHOTOGRAPHY
RADIATIONS
SEMICONDUCTOR DEVICES
SPACE
STAR EVOLUTION
STARS
T TAURI STARS
VARIABLE STARS