A Hard X-Ray Source in the Nearest Molecular Cloud
Abstract
The previous unidentified hard X-ray source H 0253 + 193 is coincident with Lynds 1457, a dark nebula at high galactic latitude (l = 159 deg, b = -34 deg). The Einstein IPC position coincides with the peak in the CO map obtained by Hobbs, Blitz, and Magnani (1986). Using interstellar Na I absorption, these authors determined a distance to the cloud of 65 pc, making this the nearest known molecular cloud. The X-ray source can be explained as an embedded T Tauri star with a 2-10 keV luminosity of 1 x 10 to the 31st erg/s.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- January 1987
- DOI:
- Bibcode:
- 1987ApJ...312L..31H
- Keywords:
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- Molecular Clouds;
- Nebulae;
- X Ray Sources;
- Carbon Monoxide;
- Heao 1;
- Pre-Main Sequence Stars;
- Sodium;
- T Tauri Stars;
- Astrophysics;
- NEBULAE: INDIVIDUAL ALPHANUMERIC: L1457 (LYNDS 1457);
- STARS: PRE--MAIN-SEQUENCE;
- X-RAYS: SOURCES