Survey observations of emission-line stars in the Orion region. III - The KISO areas A-0975 and A-0976

Details Survey observations of emission-line stars in the Orion region. III - The KISO areas A-0975 and A-0976 Survey observations of emission-line stars in the Orion region. III - The KISO areas A-0975 and A-0976

Feb 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991pasj...43...27w&link_type=abstract

Astronomical Society of Japan, Publications (ISSN 0004-6264), vol. 43, no. 1, 1991, p. 27-73.

Astronomy and Astrophysics

Astronomy

48

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.

Scientific paper

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° × 5°, centered at = 5h20m, δ = -5°) and A-0976 (5° × 5°, centered at α = 5h40m, δ = -5°) Observations have been conducted using the Kiso Schmidt telescope and partly the CTIO Curtis Schmidt telescope. The numbers of detected H 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.

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