The nature of AFGL 2591 and its associated molecular outflow Infrared and millimeter-wave observations
The results of infrared photometry from 2 to 160 microns of AFGL and CO(12) observations of its associated molecular cloud and high velocity molecular outflow are presented and discussed. The observed solar luminosity is 6.7 x 10(4) at a distance of 2 kpc. The spectrum of AFGL 2591 is interpreted in...
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| Veröffentlicht in: | The Astrophysical journal 1984-11, Vol.286 (1), p.302-309 |
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| container_title | The Astrophysical journal |
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| creator | Lada, C. J. Thronson, H. A., Jr Smith, H. A. Schwartz, P. R. Glaccum, W. |
| description | The results of infrared photometry from 2 to 160 microns of AFGL and CO(12) observations of its associated molecular cloud and high velocity molecular outflow are presented and discussed. The observed solar luminosity is 6.7 x 10(4) at a distance of 2 kpc. The spectrum of AFGL 2591 is interpreted in the context of a model in which a single embedded object is the dominant source of the infrared luminosity. This object is determined to be surrounded by a compact, optically thick dust shell with a temperature in excess of several hundred degrees kelvin. The extinction to this source is estimated to be between 26 and 50 visual magnitudes. The absolute position of the infrared sources at 10 microns was determined to an accuracy of + or - 1 in. This indicates for the first time that the IR source and H2O source are not coincident. The CO(12) observations show the high-velocity molecular flow near AFGL 2591 to be extended, bipolar and roughly centered on the infrared emission. The observations suggest that the red-shifted flow component extends beyond the boundary of the ambient cloud within which AFGL 2591 is embedded. The CO(12) observations also show that AFGL 2591 is embedded in a molecular cloud with an LSR velocity of -5 km/s. |
| doi_str_mv | 10.1086/162599 |
| format | Article |
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J. ; Thronson, H. A., Jr ; Smith, H. A. ; Schwartz, P. R. ; Glaccum, W.</creator><creatorcontrib>Lada, C. J. ; Thronson, H. A., Jr ; Smith, H. A. ; Schwartz, P. R. ; Glaccum, W.</creatorcontrib><description>The results of infrared photometry from 2 to 160 microns of AFGL and CO(12) observations of its associated molecular cloud and high velocity molecular outflow are presented and discussed. The observed solar luminosity is 6.7 x 10(4) at a distance of 2 kpc. The spectrum of AFGL 2591 is interpreted in the context of a model in which a single embedded object is the dominant source of the infrared luminosity. This object is determined to be surrounded by a compact, optically thick dust shell with a temperature in excess of several hundred degrees kelvin. The extinction to this source is estimated to be between 26 and 50 visual magnitudes. The absolute position of the infrared sources at 10 microns was determined to an accuracy of + or - 1 in. This indicates for the first time that the IR source and H2O source are not coincident. The CO(12) observations show the high-velocity molecular flow near AFGL 2591 to be extended, bipolar and roughly centered on the infrared emission. The observations suggest that the red-shifted flow component extends beyond the boundary of the ambient cloud within which AFGL 2591 is embedded. The CO(12) observations also show that AFGL 2591 is embedded in a molecular cloud with an LSR velocity of -5 km/s.</description><identifier>ISSN: 0004-637X</identifier><identifier>EISSN: 1538-4357</identifier><identifier>DOI: 10.1086/162599</identifier><identifier>CODEN: ASJOAB</identifier><language>eng</language><publisher>Legacy CDMS: University of Chicago Press</publisher><subject>Astronomy ; Astrophysics ; Earth, ocean, space ; Exact sciences and technology ; Ir sources ; Stellar systems. Galactic and extragalactic objects and systems. 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This indicates for the first time that the IR source and H2O source are not coincident. The CO(12) observations show the high-velocity molecular flow near AFGL 2591 to be extended, bipolar and roughly centered on the infrared emission. The observations suggest that the red-shifted flow component extends beyond the boundary of the ambient cloud within which AFGL 2591 is embedded. The CO(12) observations also show that AFGL 2591 is embedded in a molecular cloud with an LSR velocity of -5 km/s.</description><subject>Astronomy</subject><subject>Astrophysics</subject><subject>Earth, ocean, space</subject><subject>Exact sciences and technology</subject><subject>Ir sources</subject><subject>Stellar systems. Galactic and extragalactic objects and systems. 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Galactic and extragalactic objects and systems. The universe</topic><topic>Unidentified sources and radiation outside the solar system</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Lada, C. J.</creatorcontrib><creatorcontrib>Thronson, H. A., Jr</creatorcontrib><creatorcontrib>Smith, H. A.</creatorcontrib><creatorcontrib>Schwartz, P. R.</creatorcontrib><creatorcontrib>Glaccum, W.</creatorcontrib><collection>NASA Scientific and Technical Information</collection><collection>NASA Technical Reports Server</collection><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Technology Research Database</collection><collection>Aerospace Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>The Astrophysical journal</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Lada, C. J.</au><au>Thronson, H. A., Jr</au><au>Smith, H. A.</au><au>Schwartz, P. R.</au><au>Glaccum, W.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>The nature of AFGL 2591 and its associated molecular outflow Infrared and millimeter-wave observations</atitle><jtitle>The Astrophysical journal</jtitle><date>1984-11-01</date><risdate>1984</risdate><volume>286</volume><issue>1</issue><spage>302</spage><epage>309</epage><pages>302-309</pages><issn>0004-637X</issn><eissn>1538-4357</eissn><coden>ASJOAB</coden><abstract>The results of infrared photometry from 2 to 160 microns of AFGL and CO(12) observations of its associated molecular cloud and high velocity molecular outflow are presented and discussed. The observed solar luminosity is 6.7 x 10(4) at a distance of 2 kpc. The spectrum of AFGL 2591 is interpreted in the context of a model in which a single embedded object is the dominant source of the infrared luminosity. This object is determined to be surrounded by a compact, optically thick dust shell with a temperature in excess of several hundred degrees kelvin. The extinction to this source is estimated to be between 26 and 50 visual magnitudes. The absolute position of the infrared sources at 10 microns was determined to an accuracy of + or - 1 in. This indicates for the first time that the IR source and H2O source are not coincident. The CO(12) observations show the high-velocity molecular flow near AFGL 2591 to be extended, bipolar and roughly centered on the infrared emission. The observations suggest that the red-shifted flow component extends beyond the boundary of the ambient cloud within which AFGL 2591 is embedded. The CO(12) observations also show that AFGL 2591 is embedded in a molecular cloud with an LSR velocity of -5 km/s.</abstract><cop>Legacy CDMS</cop><pub>University of Chicago Press</pub><doi>10.1086/162599</doi><tpages>8</tpages><oa>free_for_read</oa></addata></record> |
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| ispartof | The Astrophysical journal, 1984-11, Vol.286 (1), p.302-309 |
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| language | eng |
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| source | NASA Technical Reports Server; Alma/SFX Local Collection |
| subjects | Astronomy Astrophysics Earth, ocean, space Exact sciences and technology Ir sources Stellar systems. Galactic and extragalactic objects and systems. The universe Unidentified sources and radiation outside the solar system |
| title | The nature of AFGL 2591 and its associated molecular outflow Infrared and millimeter-wave observations |
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