Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994apjs...92..369m&link_type=abstract
The Astrophysical Journal Supplement Series, vol. 92, no. 2, p. 369-373
Astronomy and Astrophysics
Astronomy
23
Galactic Nuclei, Gamma Ray Astronomy, Interstellar Matter, Molecular Clouds, Radio Jets (Astronomy), X Ray Sources, Electromagnetic Absorption, Milky Way Galaxy, Positron Annihilation, Stellar Mass Accretion
Scientific paper
The two strongest persistent soft gamma-ray sources in the Galactic center region 1E 1740.7-2942 and GRS 1758-258 appear at centimeter wavelengths as microquasar stellar remnants from which emanate double-sided radio jets that extend over a few parsecs. Millimeter observations of the dust emission and molecular transitions that trace high-density gas show that in the direction of the compact annihilation source 1E 1740.07-2942 there is a dense molecular cloud with a column density greater than or equal to 8 x 1022 cm-2 that may produce greater than or equal to 50 mg of optical absorption. On the contrary, along the direction to GRS 1758-258 there are only approximately 12 mag of optical absorption. Since at the position of the compact radio counterparts no optical or infrared sources have been found, the nature of these sources remains an open question. However, the limiting magnitudes imply that GRS 1758-258 cannot be a binary system with a companion star of spectral type earlier than A5 V. We review the known radio jets associated to other X-ray source which are located in other regions of the Galaxy and conclude that collimated jets of relativistic particules are frequently associated to accretion into collapsed objects of stellar mass.
No associations
LandOfFree
Multiwavelength approach to gamma-ray sources in the Galactic center region does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Multiwavelength approach to gamma-ray sources in the Galactic center region, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Multiwavelength approach to gamma-ray sources in the Galactic center region will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1863049