An X-ray survey for pre-main-sequence stars in the Taurus-Auriga and Perseus molecular cloud complexes

Abstract

Seventy-five fields from the Einstein X-Ray Observatory IPC detector between 3<SUP>h</SUP> and 5<SUP>h</SUP> right ascension and 15° and 35° declination are examined to search for X-ray-emitting low-mass pre-main-sequence (PMS) stars. Six such stars were previously found; they appear to be similar to T Tauri stars but without dense circumstellar envelopes or winds. The authors present here finding charts for 59 X-ray sources that may be PMS stars. While some are likely to be spurious X-ray sources, chance coincidences with unrelated stars, or non-PMS stellar sources such as RS CVn type binaries, approximately half are probably X-ray-selected PMS stars. Detailed study of the candidates will be reported elsewhere.