ROSAT observations of the X ray binary HD 154791

Details ROSAT observations of the X ray binary HD 154791 ROSAT observations of the X ray binary HD 154791

Jan 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994sao..reptq....k&link_type=abstract

Final Report, 15 May 1992 - 14 Nov. 1993 Smithsonian Astrophysical Observatory, Cambridge, MA.

Astronomy and Astrophysics

Astronomy

G Stars, Main Sequence Stars, Rosat Mission, Star Formation, T Tauri Stars, Taurus Constellation, X Ray Binaries, Infrared Photometry, Near Infrared Radiation, Prisms, Sky Surveys (Astronomy), X Ray Imagery

Scientific paper

We have been surveying the Taurus dark cloud for young stars using a variety of techniques. Two optical proper motion surveys identified 8 new pre-main sequence stars; an IRAS-based program discovered 6 new embedded sources and 4-6 new T Tauri stars. Finally, an optical objective prism survey found 12 new T Tauri stars. Our goal in this project is to examine and compare star formation in the dark clouds: Heiles cloud 2 (HCL2), L1537, L1538, and L1544. HCL2 is a very dense region actively forming young stars and contains 5-6 very young, deeply embedded sources; L1537 and L1538 have no known pre-main sequence stars; L1544 contains 7 optically visible T Tauri stars. These clouds appear roughly similar on optical sky survey plates. We would like to know why some of the clouds are active and why some are not. The first goal of the project is to survey the regions using IR photometry to identify very red pre-main sequence stars and X-ray imaging to identify solar-type young stars missed in the near-IR survey. We will follow up these observations with molecular line surveys to compare the conditions in various clouds with their star formation efficiencies.

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