Evidence for Time Evolution in the Exciting Source of the Expanding Water Maser Bubble in Cepheus A
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| Format: | Artículo científico |
| Sprache: | en |
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Universidad Nacional Autónoma de México
2002
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| _version_ | 1876466900435730432 |
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| author | Luis F. Rodríguez |
| author_facet | Luis F. Rodríguez |
| contents | Evidence for Time Evolution in the Exciting Source of the Expanding Water Maser Bubble in Cepheus A Luis F. Rodríguez J. M. Torrelles Salvador Curiel A. Porras J. Cantó Física, Astronomía y Matemáticas STARS: FORMATION STARS: MASS LOSS ISM: JETS AND OUTFLOWS RADIO CONTINUUM: STARS We analyze VLA-A observations made at 6 cm towards the Cepheus A star-forming region at three epochs: 1982.4, 1986.4, and 1990.2. We confirm that thethermal jet Cep A HW2 shows clear time variability in flux density and morphology.The radio-continuum source R5 is located about 0:006 south of Cep A HW2 and seemsto be the exciting source of the expanding bubble of H2O masers detected with theVLBA. Our maps of the region suggest that the source R5 was considerably weakerin 1982.4 than in the other two later epochs, showing for the first time evidence of itstime variability. This variability is consistent with that expected for an expandingH II region. We speculate that the turn on" of the source R5 between 1982.4 and1986.4 may be related with an enhancement in the mass loss of the nearby thermaljet Cep A HW2 during the same epoch. 2002 artículo científico 0185-1101 https://www.redalyc.org/articulo.oa?id=57138208 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.2 Vol.38 |
| format | Artículo científico |
| id | redalyc_57138208 |
| institution | Redalyc |
| language | en |
| publishDate | 2002 |
| publisher | Universidad Nacional Autónoma de México |
| spellingShingle | Evidence for Time Evolution in the Exciting Source of the Expanding Water Maser Bubble in Cepheus A Luis F. Rodríguez Física, Astronomía y Matemáticas STARS: FORMATION STARS: MASS LOSS ISM: JETS AND OUTFLOWS RADIO CONTINUUM: STARS Evidence for Time Evolution in the Exciting Source of the Expanding Water Maser Bubble in Cepheus A Luis F. Rodríguez J. M. Torrelles Salvador Curiel A. Porras J. Cantó Física, Astronomía y Matemáticas STARS: FORMATION STARS: MASS LOSS ISM: JETS AND OUTFLOWS RADIO CONTINUUM: STARS We analyze VLA-A observations made at 6 cm towards the Cepheus A star-forming region at three epochs: 1982.4, 1986.4, and 1990.2. We confirm that thethermal jet Cep A HW2 shows clear time variability in flux density and morphology.The radio-continuum source R5 is located about 0:006 south of Cep A HW2 and seemsto be the exciting source of the expanding bubble of H2O masers detected with theVLBA. Our maps of the region suggest that the source R5 was considerably weakerin 1982.4 than in the other two later epochs, showing for the first time evidence of itstime variability. This variability is consistent with that expected for an expandingH II region. We speculate that the turn on" of the source R5 between 1982.4 and1986.4 may be related with an enhancement in the mass loss of the nearby thermaljet Cep A HW2 during the same epoch. 2002 artículo científico 0185-1101 https://www.redalyc.org/articulo.oa?id=57138208 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.2 Vol.38 |
| title | Evidence for Time Evolution in the Exciting Source of the Expanding Water Maser Bubble in Cepheus A |
| topic | Física, Astronomía y Matemáticas STARS: FORMATION STARS: MASS LOSS ISM: JETS AND OUTFLOWS RADIO CONTINUUM: STARS |
| url | https://www.redalyc.org/articulo.oa?id=57138208 |