The kinematics of HH 34 from HST images with a nine-year time baseline
We study archival HST [S II ] 6716+30 and Hα images of the HH 34 outflow, taken in 1998.71 and in 2007.83. The 9 yr time baseline and the high angular resolution of these observations allow us to carry out a detailed proper-motion study. We determine the proper motions of the substructure of the HH...
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| Main Authors: | , |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
2012 April 1
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| In: |
The astrophysical journal
Year: 2012, Volume: 748, Issue: 2 |
| ISSN: | 1538-4357 |
| DOI: | 10.1088/0004-637X/748/2/103 |
| Online Access: | Verlag, Volltext: http://dx.doi.org/10.1088/0004-637X/748/2/103 Verlag, Volltext: http://stacks.iop.org/0004-637X/748/i=2/a=103 
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| Author Notes: | A.C. Raga, A. Noriega-Crespo, A. Rodríguez-González, V. Lora, K.R. Stapelfeldt, and S.J. Carey |
| Summary: | We study archival HST [S II ] 6716+30 and Hα images of the HH 34 outflow, taken in 1998.71 and in 2007.83. The 9 yr time baseline and the high angular resolution of these observations allow us to carry out a detailed proper-motion study. We determine the proper motions of the substructure of the HH 34S bow shock (from the [S II ] and Hα frames) and of the aligned knots within 30” from the outflow source (only from the [S II ] frames). We find that the present-day motions of the knots along the HH 34 jet are approximately ballistic, and that these motions directly imply the formation of a major mass concentration in 900 yr, at a position similar to the one of the present-day HH 34S bow shock. In other words, we find that the knots along the HH 34 jet will merge to form a more massive structure, possibly resembling HH 34S. |
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| Item Description: | Gesehen am 22.11.2018 |
| Physical Description: | Online Resource |
| ISSN: | 1538-4357 |
| DOI: | 10.1088/0004-637X/748/2/103 |