Survey Observations of Emission-Line Stars in the Orion Region V. The Outer Regions

Details Survey Observations of Emission-Line Stars in the Orion Region V. The Outer Regions Survey Observations of Emission-Line Stars in the Orion Region V. The Outer Regions

Dec 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995pasj...47..889n&link_type=abstract

Publications of the Astronomical Society of Japan, v.47, p.889-896.

Astronomy and Astrophysics

Astronomy

29

Clusters: Associations, Orion Complex, Stars: Emission-Line, Survey Observations, Stars: Pre-Main-Sequence

Scientific paper

We carried out survey observations for Hα emission stars in six Kiso areas A-0831 (5(deg}×5({deg)) , centered at alpha = 5() h 20() m , delta = +5(deg) ), A-0832 (alpha = 5() h 40() m, delta = +5(deg) ), A-0833 (alpha = 6() h 00() m, delta = +5(deg) ), A-0902 (alpha = 5() h 00() m, delta = +0(deg) ), A-0905 (alpha = 6() h 40() m, delta = +0(deg) ), and A-0974 (alpha = 5() h 00() m, delta = -5(deg) ) in a series of extensive surveys in the Orion region. The observations were made using the Kiso Schmidt telescope. The numbers of detected Hα emission stars were 4, 3, 6, 3, 12, and 20 for areas A-0831, A-0832, A-0833, A-0902, A-0905, and A-0974, respectively. Since four of the stars overlapped each other, the total number is 44. Out of them, 31 are new findings. Five new nonstellar objects with Hα emission were also detected. The celestial coordinates and V magnitudes of the detected stars were measured, along with an eye estimation of the Hα emission strengths. The brightness distribution, which peaks at V = 15 suggests that the detected Hα -emission stars are probable candidates of T Tauri-type stars.

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