The contribution of disks and envelopes to the millimeter continuum emission from very young low-mass stars
We investigate the question of disk formation during the protostar phase. We model the dust continuum emission from the dense cloud core using the cloud-collapse models of Terebey et al. (1984) and show that dust emission from the dense core is important when measured with large single-dish telescop...
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Veröffentlicht in: | The Astrophysical journal 1993-09, Vol.414 (2), p.759-772 |
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description | We investigate the question of disk formation during the protostar phase. We model the dust continuum emission from the dense cloud core using the cloud-collapse models of Terebey et al. (1984) and show that dust emission from the dense core is important when measured with large single-dish telescopes at 1.3 mm, but nearly negligible with interferometers at 2.7 mm. From published and new data, we conclude that massive disks are also seen toward a number of other sources including L1448 IRS 3, whose disk mass is estimated to be 0.5 solar mass. However, 1.3 mm data show that massive disks are relatively rare, occurring around perhaps 5 percent of young embedded stars. This implies that either massive disks occur briefly during the embedded phase or that relatively few young stars form massive disks. The median 1.3 mm flux density of IRAS-Dense cores in our sample is nearly the same as T Tauri stars in the sample of Beckwith et al. (1990). We conclude that the typical disk mass is not significantly higher during the embedded phase than during the later T Tauri phase. |
doi_str_mv | 10.1086/173121 |
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J. ; Andre, P.</creator><creatorcontrib>Terebey, S. ; Chandler, C. J. ; Andre, P.</creatorcontrib><description>We investigate the question of disk formation during the protostar phase. We model the dust continuum emission from the dense cloud core using the cloud-collapse models of Terebey et al. (1984) and show that dust emission from the dense core is important when measured with large single-dish telescopes at 1.3 mm, but nearly negligible with interferometers at 2.7 mm. From published and new data, we conclude that massive disks are also seen toward a number of other sources including L1448 IRS 3, whose disk mass is estimated to be 0.5 solar mass. However, 1.3 mm data show that massive disks are relatively rare, occurring around perhaps 5 percent of young embedded stars. This implies that either massive disks occur briefly during the embedded phase or that relatively few young stars form massive disks. The median 1.3 mm flux density of IRAS-Dense cores in our sample is nearly the same as T Tauri stars in the sample of Beckwith et al. (1990). We conclude that the typical disk mass is not significantly higher during the embedded phase than during the later T Tauri phase.</description><identifier>ISSN: 0004-637X</identifier><identifier>EISSN: 1538-4357</identifier><identifier>DOI: 10.1086/173121</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 implies that either massive disks occur briefly during the embedded phase or that relatively few young stars form massive disks. The median 1.3 mm flux density of IRAS-Dense cores in our sample is nearly the same as T Tauri stars in the sample of Beckwith et al. (1990). We conclude that the typical disk mass is not significantly higher during the embedded phase than during the later T Tauri phase.</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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The universe</topic><topic>Unidentified sources and radiation outside the solar system</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Terebey, S.</creatorcontrib><creatorcontrib>Chandler, C. J.</creatorcontrib><creatorcontrib>Andre, P.</creatorcontrib><collection>NASA Scientific and Technical Information</collection><collection>NASA Technical Reports Server</collection><collection>Pascal-Francis</collection><collection>CrossRef</collection><jtitle>The Astrophysical journal</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Terebey, S.</au><au>Chandler, C. J.</au><au>Andre, P.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>The contribution of disks and envelopes to the millimeter continuum emission from very young low-mass stars</atitle><jtitle>The Astrophysical journal</jtitle><date>1993-09-10</date><risdate>1993</risdate><volume>414</volume><issue>2</issue><spage>759</spage><epage>772</epage><pages>759-772</pages><issn>0004-637X</issn><eissn>1538-4357</eissn><coden>ASJOAB</coden><abstract>We investigate the question of disk formation during the protostar phase. We model the dust continuum emission from the dense cloud core using the cloud-collapse models of Terebey et al. (1984) and show that dust emission from the dense core is important when measured with large single-dish telescopes at 1.3 mm, but nearly negligible with interferometers at 2.7 mm. From published and new data, we conclude that massive disks are also seen toward a number of other sources including L1448 IRS 3, whose disk mass is estimated to be 0.5 solar mass. However, 1.3 mm data show that massive disks are relatively rare, occurring around perhaps 5 percent of young embedded stars. This implies that either massive disks occur briefly during the embedded phase or that relatively few young stars form massive disks. The median 1.3 mm flux density of IRAS-Dense cores in our sample is nearly the same as T Tauri stars in the sample of Beckwith et al. (1990). We conclude that the typical disk mass is not significantly higher during the embedded phase than during the later T Tauri phase.</abstract><cop>Legacy CDMS</cop><pub>University of Chicago Press</pub><doi>10.1086/173121</doi><tpages>14</tpages></addata></record> |
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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 contribution of disks and envelopes to the millimeter continuum emission from very young low-mass stars |
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