The Canis Major dwarf galaxy as the progenitor of the Monoceros tidal stream
| Autor: | Dana I. Dinescu, Jorge Peñarrubia, H.-W. Rix, David Martínez-Delgado, D. J. Butler |
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| Rok vydání: | 2005 |
| Předmět: |
Physics
media_common.quotation_subject Astrophysics (astro-ph) FOS: Physical sciences Astronomy Astronomy and Astrophysics Astrophysics::Cosmology and Extragalactic Astrophysics Galactic plane Astrophysics Galaxy Orbit Stars Space and Planetary Science Sky Galaxy formation and evolution Astrophysics::Solar and Stellar Astrophysics Satellite Astrophysics::Earth and Planetary Astrophysics Astrophysics::Galaxy Astrophysics Dwarf galaxy media_common |
| Zdroj: | Proceedings of the International Astronomical Union. 1:97-100 |
| ISSN: | 1743-9221 1743-9213 |
| Popis: | The Sloan Digital Sky Survey has recently discovered a coherent ring of stars at low galactic latitude that is believed to be the tidal stream of a merging dwarf galaxy in the Galactic plane (named the Monoceros tidal stream). The existence and location of the core of its progenitor galaxy is still controversial. The best candidate is the Canis Major dwarf galaxy, a distinct overdensity of red stars discovered in the 2MASS survey, but also interpreted as the signature of the Galactic warp viewed in projection. In this paper, we report a variety of new observational evidence that supports the notion that CMa is the remnant of a partially disrupted core of a dwarf satellite. The comparison of the orbit derived from our theoretical model for the parent galaxy of this ring-like structure with an accurate determination of CMa orbit leads to the conclusion that this satellite is the best candidate for the progenitor of the Monoceros tidal stream. 4 pages,2 figures, Proceeding of the IAU Colloquium No. 198, 2005, "Near Field Cosmology with Dwarf Elliptical Galaxies",Jerjen & Binggeli eds. Paper with high-quality figures can be downloaded from: ftp://ftp.iaa.csic.es/pub/ddelgado/martinez-delgado.ps.gz |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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