A New Look at the Holes of IC 2574
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| Formato: | Artículo científico |
| Lenguaje: | en |
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Universidad Nacional Autónoma de México
2002
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| _version_ | 1876491108143333376 |
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| author | F. J. Sánchez Salcedo |
| author_facet | F. J. Sánchez Salcedo |
| contents | A New Look at the Holes of IC 2574 F. J. Sánchez Salcedo Física, Astronomía y Matemáticas GALAXIES: ISM ISM: STRUCTURE ISM: KINEMATICS AND DYNAMICS GALAXIES: INDIVIDUAL (IC 2574) Several scenarios have been proposed to explain the existence of H I holes ingalaxies. In this work, the properties of the holes and shells in the nearby dwarfgalaxy IC 2574 are used to test the different models. We report that the distribution of the kinematic ages of the holes located at the receding side of the galaxy isremarkably different from the distribution for the holes situated at the approachingside. The mean values of the kinematic ages are 16:45 5:0 Myr and 30:0 13:0/10:5 Myr,respectively. We estimate a probability of less than 4 x10_3 that the age distributions were drawn at random. An asymmetry between both sides is also foundin the photometric properties and in the H I mass. These results are interpretedas evidence in favor of a connection between the star formation activity and theformation of holes in the interstellar medium, in accordance with the predictions ofthe classical hypothesis that shells are created by multiple supernova explosions. Inaddition, we find that the alternative scenarios face substantial difficulties and, sofar, none of them can convincingly explain the observed abundance of sphericallyexpanding shells. After an examination of the different alternative models, we conclude that most of the holes in IC 2574 are likely the result of multiple supernovaexplosions. 2002 artículo científico 0185-1101 https://www.redalyc.org/articulo.oa?id=57138105 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_57138105 |
| institution | Redalyc |
| language | en |
| publishDate | 2002 |
| publisher | Universidad Nacional Autónoma de México |
| spellingShingle | A New Look at the Holes of IC 2574 F. J. Sánchez Salcedo Física, Astronomía y Matemáticas GALAXIES: ISM ISM: STRUCTURE ISM: KINEMATICS AND DYNAMICS GALAXIES: INDIVIDUAL (IC 2574) A New Look at the Holes of IC 2574 F. J. Sánchez Salcedo Física, Astronomía y Matemáticas GALAXIES: ISM ISM: STRUCTURE ISM: KINEMATICS AND DYNAMICS GALAXIES: INDIVIDUAL (IC 2574) Several scenarios have been proposed to explain the existence of H I holes ingalaxies. In this work, the properties of the holes and shells in the nearby dwarfgalaxy IC 2574 are used to test the different models. We report that the distribution of the kinematic ages of the holes located at the receding side of the galaxy isremarkably different from the distribution for the holes situated at the approachingside. The mean values of the kinematic ages are 16:45 5:0 Myr and 30:0 13:0/10:5 Myr,respectively. We estimate a probability of less than 4 x10_3 that the age distributions were drawn at random. An asymmetry between both sides is also foundin the photometric properties and in the H I mass. These results are interpretedas evidence in favor of a connection between the star formation activity and theformation of holes in the interstellar medium, in accordance with the predictions ofthe classical hypothesis that shells are created by multiple supernova explosions. Inaddition, we find that the alternative scenarios face substantial difficulties and, sofar, none of them can convincingly explain the observed abundance of sphericallyexpanding shells. After an examination of the different alternative models, we conclude that most of the holes in IC 2574 are likely the result of multiple supernovaexplosions. 2002 artículo científico 0185-1101 https://www.redalyc.org/articulo.oa?id=57138105 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 | A New Look at the Holes of IC 2574 |
| topic | Física, Astronomía y Matemáticas GALAXIES: ISM ISM: STRUCTURE ISM: KINEMATICS AND DYNAMICS GALAXIES: INDIVIDUAL (IC 2574) |
| url | https://www.redalyc.org/articulo.oa?id=57138105 |