Zobrazeno 1 - 10
of 75
pro vyhledávání: '"Cragg, D. A."'
We have used the Swedish ESO Submillimetre Telescope (SEST) to search for new class II methanol maser transitions towards the southern source G345.01+1.79. Over a period of 5 days we observed 11 known or predicted class II methanol maser transitions.
Externí odkaz:
http://arxiv.org/abs/1209.5744
Autor:
Sobolev, A. M., Cragg, D. M., Ellingsen, S. P., Gaylard, M. J., Goedhart, S., Henkel, C., Kirsanova, M. S., Ostrovskii, A. B., Pankratova, N. V., Shelemei, O. V., van der Walt, D. J., Vasyunina, T. S., Voronkov, M. A.
General characteristics of methanol (CH3OH) maser emission are summarized. It is shown that methanol maser sources are concentrated in the spiral arms. Most of the methanol maser sources from the Perseus arm are associated with embedded stellar clust
Externí odkaz:
http://arxiv.org/abs/0706.3117
Autor:
Ellingsen, S. P., Voronkov, M. A., Cragg, D. M., Sobolev, A. M., Breen, S. L., Godfrey, P. D.
Interstellar masers are unique probes of the environments in which they arise. In studies of high-mass star formation their primary function has been as signposts of these regions and they have been used as probes of the kinematics and physical condi
Externí odkaz:
http://arxiv.org/abs/0705.2906
Autor:
Cunningham, M. R., Jones, P. A., Godfrey, P. D., Cragg, D. M., Bains, I., Burton, M. G., Calisse, P., Crighton, N. H. M., Curran, S. J., Davis, T. M., Dempsey, J. T., Fulton, B., Hidas, M. G., Hill, T., Kedziora-Chudczer, L., Minier, V., Pracy, M. B., Purcell, C., Shobbrook, J., Travouillon, T.
Publikováno v:
Mon.Not.Roy.Astron.Soc.376:1201-1210,2007
We have used the Mopra Telescope to search for glycine and the simple chiral molecule propylene oxide in the Sgr B2 (LMH) and Orion KL, in the 3-mm band. We have not detected either species, but have been able to put sensitive upper limits on the abu
Externí odkaz:
http://arxiv.org/abs/astro-ph/0701866
Publikováno v:
Mon.Not.Roy.Astron.Soc.374:579-589,2007
We have used the Australia Telescope Compact Array to conduct a search for the simplest amino acid, glycine (conformers I and II), and the simple chiral molecule propylene oxide at 3-mm in the Sgr B2 LMH. We searched 15 portions of spectrum between 8
Externí odkaz:
http://arxiv.org/abs/astro-ph/0610273
Publikováno v:
Mon.Not.Roy.Astron.Soc. 360 (2005) 533-545
The class II masers of methanol are associated with the early stages of formation of high-mass stars. Modelling of these dense, dusty environments has demonstrated that pumping by infrared radiation can account for the observed masers. Collisions wit
Externí odkaz:
http://arxiv.org/abs/astro-ph/0504194
Publikováno v:
Astrophys.Space Sci. 295 (2005) 189-196
In studies of the environment of massive young stellar objects, recent progress in both observations and theory allows a unified treatment of data for maser and 'quasi-thermal' lines. Interferometric maser images provide information on the distributi
Externí odkaz:
http://arxiv.org/abs/astro-ph/0409188
Autor:
Ellingsen, S. P., Cragg, D. M., Lovell, J. E. J., Sobolev, A. M., Ramsdale, P. D., Godfrey, P. D.
We have used the NASA Tidbinbilla 70-m antenna to search for emission from the 2(1)-3(0)E 19.9-GHz transition of methanol. The search was targeted towards 22 star formation regions which exhibit maser emission in the 107.0-GHz 3(1)-4(0)A+ methanol tr
Externí odkaz:
http://arxiv.org/abs/astro-ph/0407246
Autor:
Sobolev, A. M., Sutton, E. C., Cragg, D. M., Ellingsen, S. P., Mehringer, D. M., Zinchenko, I. I., Ostrovskii, A. B., Godfrey, P. D.
Publikováno v:
Astron.Astrophys.Trans.20:229-232,2001
Methanol masers and molecular shock tracers were observed in the W3(OH)/W3(H$_2$O) region with the BIMA array and the Onsala 20m radiotelescope. Characteristics of the outflows in the region are discussed. A model of the W3(OH) methanol maser formati
Externí odkaz:
http://arxiv.org/abs/astro-ph/0404406
Publikováno v:
Mon.Not.Roy.Astron.Soc. 351 (2004) 1327
In the early days of methanol maser discoveries the 9(2)-10(1) A+ transition at 23.1 GHz was found to exhibit maser characteristics in the northern star-forming region W3(OH), and probable maser emission in two other sources. Attention subsequently t
Externí odkaz:
http://arxiv.org/abs/astro-ph/0404116