Observations of H. cap alpha. -emission stars in the young cluster NGC 2264

Journal Article · Mon Jan 01 04:00:00 EST 1979 · Astron. J.; (United States)

OSTI ID:6536310

Rydgren, A E

UBVRI photometry is given for a sample of 25 late-type H..cap alpha..-emission stars in the young cluster NGC 2264. The stars are in the magnitude range 12< or =V<16. Some but not all appear to be T Tauri stars. The color--color diagrams support the view that the deviations from normal photospheric colors (due to ''spectral veiling'' and line emission) decrease with increasing wavelength between the U and I filters. In the (V, V-R) diagram, the H..cap alpha..-emission stars lie in a well-defined pre-main-sequence band. Within this sample, there is a trend toward stronger line emission and spectral veiling with later spectral type. All of the likely legitimate T Tauri stars have inferred spectral types later than about K3. The question of cluster membership for stars in the cluster field with very small proper motions is considered.

• Research Organization: Department of Physics, Rensselaer Polytechnic Institute, Troy, New York 12181
• OSTI ID: 6536310
• Journal Information: Astron. J.; (United States), Journal Name: Astron. J.; (United States) Vol. 84:1; ISSN ANJOA
• Country of Publication: United States
• Language: English

Related Subjects

640102* -- Astrophysics &amp; Cosmology-- Stars &amp; Quasi-Stellar
Radio &amp; X-Ray Sources
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
BALMER LINES
COSMIC DUST
DUSTS
ELECTROMAGNETIC RADIATION
ERUPTIVE VARIABLE STARS
INTERSTELLAR SPACE
MOTION
PHOTOMETRY
PROPER MOTION
RADIATIONS
SPACE
STAR CLUSTERS
STAR EVOLUTION
STARS
T TAURI STARS
ULTRAVIOLET RADIATION
VARIABLE STARS