Survey Observations of Emission-Line Stars in the Orion Region. III. The KISO Areas A-0975 and A-0976
Abstract
As a succession of our extensive survey for Hα emission stars in the Orion region, we present the results for the Kiso sky areas A-0975 (5(deg) times 5(deg) , centered at alpha = 5() h20() m, delta = -5(deg) ) and A-0976 (5(deg) times 5(deg) , centered at alpha = 5() h40() m, delta = -5(deg) ). Observations have been conducted using the Kiso Schmidt telescope and partly the CTIO Curtis Schmidt telescope. The numbers of detected Hα emission objects are 191 and 415 for areas A-0975 and A-0976, respectively, among which 154 in A-0975 and 122 (including 4 suspected) in A-0976 are new findings in the present survey. The celestial coordinates and the V magnitudes are measured for the detected objects, along with eye estimation of the Hα emission strength. Based on the magnitude distribution around V = 14--16, most of the detected emission-line stars are supposed to be T Tauri-type stars. It is found that the emission-line stars are distributed widely around the Orion A complex and its west side. A rather uniform distribution of emission-line stars in area A-0975 is notable, as seen in its north neighboring area A-0903.
- Publication:
-
Publications of the Astronomical Society of Japan
- Pub Date:
- February 1991
- Bibcode:
- 1991PASJ...43...27W
- Keywords:
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- Emission Spectra;
- Sky Surveys (Astronomy);
- Stellar Spectra;
- H Alpha Line;
- Orion Constellation;
- Schmidt Telescopes;
- T Tauri Stars;
- Emission-line stars; OB association; Survey observations; The Orion Complex; T Tauri stars.;
- Astronomy;
- EMISSION-LINE STARS;
- OB ASSOCIATION;
- SURVEY OBSERVATIONS;
- THE ORION COMPLEX;
- T TAURI STARS