تقرير
CO(1-0) detection of molecular gas in the massive Spiderweb Galaxy (z=2)
| العنوان: | CO(1-0) detection of molecular gas in the massive Spiderweb Galaxy (z=2) |
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| المؤلفون: | Emonts, B. H. C., Feain, I., Roettgering, H. J. A., Miley, G., Seymour, N., Norris, R. P., Carilli, C. L., Villar-Martin, M., Mao, M. Y., Sadler, E. M., Ekers, R. D., van Moorsel, G. A., Ivison, R. J., Pentericci, L., Tadhunter, C. N., Saikia, D. J. |
| سنة النشر: | 2013 |
| المجموعة: | Astrophysics |
| مصطلحات موضوعية: | Astrophysics - Cosmology and Nongalactic Astrophysics |
| الوصف: | The high-redshift radio galaxy MRC 1138-262 (`Spiderweb Galaxy'; z = 2.16), is one of the most massive systems in the early Universe and surrounded by a dense `web' of proto-cluster galaxies. Using the Australia Telescope Compact Array, we detected CO(1-0) emission from cold molecular gas -- the raw ingredient for star formation -- across the Spiderweb Galaxy. We infer a molecular gas mass of M(H2) = 6x10^10 M(sun) (for M(H2)/L'(CO)=0.8). While the bulk of the molecular gas coincides with the central radio galaxy, there are indications that a substantial fraction of this gas is associated with satellite galaxies or spread across the inter-galactic medium on scales of tens of kpc. In addition, we tentatively detect CO(1-0) in the star-forming proto-cluster galaxy HAE 229, 250 kpc to the west. Our observations are consistent with the fact that the Spiderweb Galaxy is building up its stellar mass through a massive burst of widespread star formation. At maximum star formation efficiency, the molecular gas will be able to sustain the current star formation rate (SFR ~ 1400 M(sun)/yr, as traced by Seymour et al.) for about 40 Myr. This is similar to the estimated typical lifetime of a major starburst event in infra-red luminous merger systems. Comment: 7 pages, 3 figures - accepted for publication in MNRAS |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1093/mnras/stt147 |
| URL الوصول: | http://arxiv.org/abs/1301.6012 |
| رقم الأكسشن: | edsarx.1301.6012 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1093/mnras/stt147 |
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