THE KINEMATICS OF HH 34 FROM HST IMAGES WITH A NINE-YEAR TIME BASELINE
We study archival HST [SII] 6716+30 and H alpha 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...
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| Veröffentlicht in: | The Astrophysical journal 2012-04, Vol.748 (2), p.1-10 |
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| container_title | The Astrophysical journal |
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| creator | RAGA, A. C NORIEGA-CRESPO, A RODRIGUEZ-GONZALEZ, A LORA, V STAPELFELDT, K. R CAREY, S. J |
| description | We study archival HST [SII] 6716+30 and H alpha 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 [SII] and H alpha frames) and of the aligned knots within ~30" from the outflow source (only from the [SII] 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. |
| doi_str_mv | 10.1088/0004-637X/748/2/103 |
| format | Article |
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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.</description><subject>Alignment</subject><subject>Angular resolution</subject><subject>Astronomy</subject><subject>ASTROPHYSICS, COSMOLOGY AND ASTRONOMY</subject><subject>Earth, ocean, space</subject><subject>Exact sciences and technology</subject><subject>Formations</subject><subject>Frames</subject><subject>HERBIG-HARO OBJECTS</subject><subject>INTERSTELLAR GRAINS</subject><subject>Kinematics</subject><subject>Knots</subject><subject>MASS</subject><subject>Outflow</subject><subject>PROPER MOTION</subject><subject>SHOCK WAVES</subject><subject>STARS</subject><subject>Substructures</subject><issn>0004-637X</issn><issn>1538-4357</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2012</creationdate><recordtype>article</recordtype><recordid>eNqNkV1LwzAUhoMoOKe_wJuACN7UJTlp0l7W0a3FfcBWUa9ClqZY2dbZdBf-ezM2du3V4bw857znA6F7Sp4piaIBIYQHAuTHQPJowAaUwAXq0RCigEMoL1HvTFyjG-e-DymL4x4aFVmKX_NZOk2KfLjE8xHOMgwcjxbzKc6WBc6nyThd4ve8yHCCZx4NPtNkgYt8muKXZJlOvHSLriq9dvbuFPvobZQWwyyYzMf5MJkEBgh0gY69rRHRqqpYaSXIlRalYDYstYDYT2oYxLoMGY9LbgEkJbQkgmq2WsXCRNBHD8e-jetq5UzdWfNlmu3Wmk4xRqighHvq6Ujt2uZnb12nNrUzdr3WW9vsnaIiCiMAzuh_UMK5FJJ5FI6oaRvnWlupXVtvdPurKFGHN6jDVdXhyMq_QTEvgq96PBloZ_S6avXW1O5cygTzy1IJf02zfdY</recordid><startdate>20120401</startdate><enddate>20120401</enddate><creator>RAGA, A. 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C</creatorcontrib><creatorcontrib>NORIEGA-CRESPO, A</creatorcontrib><creatorcontrib>RODRIGUEZ-GONZALEZ, A</creatorcontrib><creatorcontrib>LORA, V</creatorcontrib><creatorcontrib>STAPELFELDT, K. R</creatorcontrib><creatorcontrib>CAREY, S. J</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Meteorological & Geoastrophysical Abstracts</collection><collection>Meteorological & Geoastrophysical Abstracts - Academic</collection><collection>Technology Research Database</collection><collection>Aerospace Database</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>OSTI.GOV</collection><jtitle>The Astrophysical journal</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>RAGA, A. C</au><au>NORIEGA-CRESPO, A</au><au>RODRIGUEZ-GONZALEZ, A</au><au>LORA, V</au><au>STAPELFELDT, K. R</au><au>CAREY, S. 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| subjects | Alignment Angular resolution Astronomy ASTROPHYSICS, COSMOLOGY AND ASTRONOMY Earth, ocean, space Exact sciences and technology Formations Frames HERBIG-HARO OBJECTS INTERSTELLAR GRAINS Kinematics Knots MASS Outflow PROPER MOTION SHOCK WAVES STARS Substructures |
| title | THE KINEMATICS OF HH 34 FROM HST IMAGES WITH A NINE-YEAR TIME BASELINE |
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