Multiepoch Radio Observations of the Exciting Sources of HH 212 and HH 119
We present high angular resolution (- 0.``3) Very Large Array observationsat 3.5 cm toward the regions of the exciting sources of two Herbig-Haro systems,namely, HH 212 in Orion and HH 119 in B335. The observations were made at threedifferent epochs to search for possible fast time variations in the...
| Authors: | , , |
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| Format: | article |
| Status: | Published version |
| Publication Date: | 2004 |
| Country: | México |
| Institution: | Universidad Nacional Autónoma de México |
| Repository: | Redalyc-UNAM |
| OAI Identifier: | oai:redalyc.org:57140104 |
| Online Access: | https://www.redalyc.org/articulo.oa?id=57140104 |
| Access Level: | Open access |
| Keyword: | Física, Astronomía y Matemáticas HH 212 HH 119) STARS: FORMATION STARS: MASS LOSS ISM: INDIVIDUAL (B335 |
| Summary: | We present high angular resolution (- 0.``3) Very Large Array observationsat 3.5 cm toward the regions of the exciting sources of two Herbig-Haro systems,namely, HH 212 in Orion and HH 119 in B335. The observations were made at threedifferent epochs to search for possible fast time variations in the sources (on a scaleof one week to one month). In HH 212 we detected, averaging the observations ofthe three epochs, a faint object, at the expected position for the exciting source ofthe HH system. Comparison with other radio observations indicates that this sourceexhibits considerable time variation on a scale of years. In B335 we detected at eachepoch the source previously reported by other authors and our results suggest thatthis object, a thermal radio jet, is variable on timescales of a month. We discusspossible explanations for this fast variability. |
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