The X-ray shadow of the high-latitude molecular cloud MBM 12

Autor:	Dan McCammon, F. Verter, Steven L. Snowden
Rok vydání:	1993
Předmět:	Physics X-ray astronomy Astrophysics::High Energy Astrophysical Phenomena Molecular cloud Interstellar cloud Astronomy Astronomy and Astrophysics Astrophysics Interstellar medium Space and Planetary Science ROSAT Shadow Optical depth Background radiation
Zdroj:	The Astrophysical Journal. 409:L21
ISSN:	1538-4357 0004-637X
DOI:	10.1086/186850
Popis:	ROSAT XRT/PSPC observations show a deep shadow cast by the high-latitude molecular cloud MBM 12 in the 3/4 keV diffuse background. Modeling of the shadow implies that less than 20 percent of the typical high-latitude 3/4 keV diffuse background intensity is emitted in front of the cloud (D = 60-70 pc). A weaker shadow consistent with the lower optical depth at higher energies was observed in the 1.5 keV band. Since little shadowing was seen in the 1/4 keV band, this observation places strong constraints on the amount of 0.5-2 keV emission that is intermixed with the source of the observed 1/4 keV flux.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::14e3688b994a444d4e56064e1db8fcb7 https://doi.org/10.1086/186850 Zobrazit plný text záznamu