Large Proper Motions in the Young Low-Mass Protostellar System IRAS 16293-2422
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| Natura: | Artículo científico |
| Lingua: | en |
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Universidad Nacional Autónoma de México
2002
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| _version_ | 1876463922695897088 |
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| author | L. Loinard |
| author_facet | L. Loinard |
| contents | Large Proper Motions in the Young Low-Mass Protostellar System IRAS 16293-2422 L. Loinard Física, Astronomía y Matemáticas ASTROMETRY STARS: FORMATION BINARIES: GENERAL ISM: JETS AND OUTFLOWS We compare high angular resolution VLA 3.6-cm continuum observations ofthe protostellar system IRAS 16293-2422 obtained in 1989 and 1994, and showthat the positions of the three VLA sources in IRAS 16293-2422 have changedsignificantly between the two epochs. The corresponding angular displacements aremuch larger than the parallax of those sources, and imply transverse velocities (10-30 km s_1) well above the Keplerian rotation speeds expected for those low{masssources. The proper motions of two of the components appear to be very similarto one another, and to the proper motions of pre{main sequence stars in the samedirection. We argue that they correspond to the overall proper motion of the smallcloud (L1689N) harboring IRAS 16293-2422. The displacement of the third source,however, is larger and in a different direction. That component has previously beenargued to be a shock between a partially ionized wind and the ambient medium, sosome fast motions are not unexpected. It is somewhat puzzling, however, that thedirection of the motion does not coincide with the direction of any of the known outflows powered by IRAS 16293-2422. 2002 artículo científico 0185-1101 https://www.redalyc.org/articulo.oa?id=57138107 en http://www.redalyc.org/revista.oa?id=571 Revista Mexicana de Astronomía y Astrofísica application/pdf Universidad Nacional Autónoma de México Revista Mexicana de Astronomía y Astrofísica (México) Num.1 Vol.38 |
| format | Artículo científico |
| id | redalyc_57138107 |
| institution | Redalyc |
| language | en |
| publishDate | 2002 |
| publisher | Universidad Nacional Autónoma de México |
| spellingShingle | Large Proper Motions in the Young Low-Mass Protostellar System IRAS 16293-2422 L. Loinard Física, Astronomía y Matemáticas ASTROMETRY STARS: FORMATION BINARIES: GENERAL ISM: JETS AND OUTFLOWS Large Proper Motions in the Young Low-Mass Protostellar System IRAS 16293-2422 L. Loinard Física, Astronomía y Matemáticas ASTROMETRY STARS: FORMATION BINARIES: GENERAL ISM: JETS AND OUTFLOWS We compare high angular resolution VLA 3.6-cm continuum observations ofthe protostellar system IRAS 16293-2422 obtained in 1989 and 1994, and showthat the positions of the three VLA sources in IRAS 16293-2422 have changedsignificantly between the two epochs. The corresponding angular displacements aremuch larger than the parallax of those sources, and imply transverse velocities (10-30 km s_1) well above the Keplerian rotation speeds expected for those low{masssources. The proper motions of two of the components appear to be very similarto one another, and to the proper motions of pre{main sequence stars in the samedirection. We argue that they correspond to the overall proper motion of the smallcloud (L1689N) harboring IRAS 16293-2422. The displacement of the third source,however, is larger and in a different direction. That component has previously beenargued to be a shock between a partially ionized wind and the ambient medium, sosome fast motions are not unexpected. It is somewhat puzzling, however, that thedirection of the motion does not coincide with the direction of any of the known outflows powered by IRAS 16293-2422. 2002 artículo científico 0185-1101 https://www.redalyc.org/articulo.oa?id=57138107 en http://www.redalyc.org/revista.oa?id=571 Revista Mexicana de Astronomía y Astrofísica application/pdf Universidad Nacional Autónoma de México Revista Mexicana de Astronomía y Astrofísica (México) Num.1 Vol.38 |
| title | Large Proper Motions in the Young Low-Mass Protostellar System IRAS 16293-2422 |
| topic | Física, Astronomía y Matemáticas ASTROMETRY STARS: FORMATION BINARIES: GENERAL ISM: JETS AND OUTFLOWS |
| url | https://www.redalyc.org/articulo.oa?id=57138107 |