تقرير
Serendipitous Discovery of a Thin Stellar Stream near the Galactic Bulge in the Pan-STARRS1 3Pi Survey
| العنوان: | Serendipitous Discovery of a Thin Stellar Stream near the Galactic Bulge in the Pan-STARRS1 3Pi Survey |
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| المؤلفون: | Bernard, Edouard J., Ferguson, Annette M. N., Schlafly, Edward F., Abbas, Mohamad, Bell, Eric F., Deacon, Niall R., Martin, Nicolas F., Rix, Hans-Walter, Sesar, Branimir, Slater, Colin T., Peñarrubia, Jorge, Wyse, Rosemary F. G., Burgett, William S., Chambers, Kenneth C., Draper, Peter W., Hodapp, Klaus W., Kaiser, Nicholas, Kudritzki, Rolf-Peter, Magnier, Eugene A., Metcalfe, Nigel, Morgan, Jeffrey S., Price, Paul A., Tonry, John L., Wainscoat, Richard J., Waters, Christopher |
| سنة النشر: | 2014 |
| المجموعة: | Astrophysics |
| مصطلحات موضوعية: | Astrophysics - Astrophysics of Galaxies |
| الوصف: | We report the discovery of a thin stellar stream found in Pan-STARRS1 photometry near the Galactic bulge in the constellation of Ophiuchus. It appears as a coherent structure in the colour-selected stellar density maps produced to search for tidal debris around nearby globular clusters. The stream is exceptionally short and narrow; it is about 2.5{\deg} long and 6' wide in projection. The colour-magnitude diagram of this object, which harbours a blue horizontal-branch, is consistent with an old and relatively metal-poor population ([Fe/H]~-1.3) located 9.5 +/- 0.9 kpc away at (l,b) ~ (5{\deg},+32{\deg}), and 5.0 +/- 1.0 kpc from the Galactic centre. These properties argue for a globular cluster as progenitor. The finding of such a prominent, nearby stream suggests that many streams could await discovery in the more densely populated regions of our Galaxy. Comment: 5 pages, 3 figures. MNRAS, in press |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1093/mnrasl/slu089 |
| URL الوصول: | http://arxiv.org/abs/1405.6645 |
| رقم الأكسشن: | edsarx.1405.6645 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1093/mnrasl/slu089 |
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