SEYFERT'S SEXTET: A SLOWLY DISSOLVING STEPHAN'S QUINTET?
| العنوان: | SEYFERT'S SEXTET: A SLOWLY DISSOLVING STEPHAN'S QUINTET? |
|---|---|
| المؤلفون: | J. W. Sulentic, A. Iovino, Lourdes Verdes-Montenegro, A. del Olmo, Margarita Rosado, Min Yun, A. Durbala, Henri Plana, I. Fuentes-Carrera, Jaime Perea |
| المصدر: | The Astronomical Journal. 135:130-155 |
| بيانات النشر: | American Astronomical Society, 2007. |
| سنة النشر: | 2007 |
| مصطلحات موضوعية: | Physics, Astrophysics (astro-ph), FOS: Physical sciences, Astronomy and Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics, Accretion (astrophysics), Galaxy, Normal field, Space and Planetary Science, Galaxy group, Stripping (linguistics), Emission spectrum, Halo, Dissolution, Astrophysics::Galaxy Astrophysics |
| الوصف: | We present a multiwavelength study of the highly evolved compact galaxy group known as Seyfert's Sextet (HCG79: SS). We interpret SS as a 2-3 Gyr more evolved analog of Stephan's Quintet (HCG92: SQ). We postulate that SS formed by sequential acquisition of 4-5 primarily late-type field galaxies. Four of the five galaxies show an early-type morphology which is likely the result of secular evolution driven by gas stripping. Stellar stripping has produced a massive/luminous halo and embedded galaxies that are overluminous for their size. These are interpreted as remnant bulges of the accreted spirals. H79d could be interpreted as the most recent intruder being the only galaxy with an intact ISM and uncertain evidence for tidal perturbation. In addition to stripping activity we find evidence for past accretion events. H79b (NGC6027) shows a strong counter-rotating emission line component interpreted as an accreted dwarf spiral. H79a shows evidence for an infalling component of gas representing feedback or possible cross fueling by H79d. The biggest challenge to this scenario involves the low gas fraction in the group. If SS formed from normal field spirals then much of the gas is missing. Finally, despite its advanced stage of evolution, we find no evidence for major mergers and infer that SS (and SQ) are telling us that such groups coalesce via slow dissolution. Comment: 70 pages, 19 figures, 15 tables - accepted for publication in the Astronomical Journal |
| تدمد: | 1538-3881 0004-6256 |
| DOI: | 10.1088/0004-6256/135/1/130 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e151759c859bcbc54570c4d9afeaaa34 https://doi.org/10.1088/0004-6256/135/1/130 |
| Rights: | OPEN |
| رقم الانضمام: | edsair.doi.dedup.....e151759c859bcbc54570c4d9afeaaa34 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 15383881 00046256 |
|---|---|
| DOI: | 10.1088/0004-6256/135/1/130 |