Zobrazeno 91 - 100
of 1 753
pro vyhledávání: '"Wyrowski, F."'
Context. HCN is a major constituent of the circumstellar envelopes of carbon-rich evolved stars, and rotational lines from within its vibrationally excited states probe parts of these regions closest to the stellar surface. A number of such lines are
Externí odkaz:
http://arxiv.org/abs/1803.00943
Autor:
Tang, X. D., Henkel, C., Wyrowski, F., Giannetti, A., Menten, K. M., Csengeri, T., Leurini, S., Urquhart, J. S., Koenig, C., Guesten, R., Lin, Y. X., Zheng, X. W., Esimbek, J., Zhou, J. J.
Publikováno v:
A&A 611, A6 (2018)
We aim to directly determine the kinetic temperature and spatial density with formaldehyde for the $\sim$100 brightest ATLASGAL-selected clumps at 870 $\mu$m representing various evolutionary stages of high-mass star formation. Ten transitions ($J$ =
Externí odkaz:
http://arxiv.org/abs/1711.10012
Autor:
Giannetti, A., Leurini, S., Koenig, C., Urquhart, J. S., Pillai, T., Brand, J., Kauffmann, J., Wyrowski, F., Menten, K. M.
Publikováno v:
A&A 606, L12 (2017)
(Abridged) Context: The assumption of a gas-to-dust mass ratio (\gamma) is a common approach to estimate the basic properties of molecular clouds, such as total mass and column density of molecular hydrogen, from (sub)mm continuum observations of the
Externí odkaz:
http://arxiv.org/abs/1710.05721
Publikováno v:
A&A 612, A48 (2018)
The circumstellar ammonia (NH$_3$) chemistry in evolved stars is poorly understood. Previous observations and modelling showed that NH$_3$ abundance in oxygen-rich stars is several orders of magnitude above that predicted by equilibrium chemistry. In
Externí odkaz:
http://arxiv.org/abs/1710.01027
Autor:
Tang, X. D., Henkel, C., Menten, K. M., Wyrowski, F., Brinkmann, N., Zheng, X. W., Gong, Y., Lin, Y. X., Esimbek, J., Zhou, J. J., Yuan, Y., Li, D. L., He, Y. X.
Publikováno v:
A&A 609, A16 (2018)
We mapped the kinetic temperature structure of the Orion molecular cloud 1 with para-H2CO(303-202, 322-221, and 321-220) using the APEX 12m telescope. This is compared with the temperatures derived from the ratio of the NH3(2,2)/(1,1) inversion lines
Externí odkaz:
http://arxiv.org/abs/1709.07694
Autor:
Urquhart, J. S., Koenig, C., Giannetti, A., Leurini, S., Moore, T. J. T., Eden, D. J., Pillai, T., Thompson, M. A., Braiding, C., Burton, M. G., Csengeri, T., Dempsey, J. T., Figura, C., Froebrich, D., Menten, K. M., Schuller, F., Smith, M. D., Wyrowski, F.
Abridged: ATLASGAL is an unbiased 870 micron submillimetre survey of the inner Galactic plane. It provides a large and systematic inventory of all massive, dense clumps in the Galaxy (>1000 Msun) and includes representative samples of all embedded st
Externí odkaz:
http://arxiv.org/abs/1709.00392
Autor:
Van de Sande, M., Decin, L., Lombaert, R., Khouri, T., de Koter, A., Wyrowski, F., De Nutte, R., Homan, W.
Publikováno v:
A&A 609, A63 (2018)
(abridged) Our aim is to determine the radial abundance profile of SiO and HCN throughout the stellar outflow of R Dor, an oxygen-rich AGB star with a low mass-loss rate. We have analysed molecular transitions of CO, SiO, and HCN measured with the AP
Externí odkaz:
http://arxiv.org/abs/1708.09190
Autor:
Wienen, M., Wyrowski, F., Menten, K. M., Urquhart, J. S., Walmsley, C. M., Csengeri, T., Koribalski, B. S., Schuller, F.
The initial conditions of molecular clumps in which high-mass stars form are poorly understood. In particular, a more detailed study of the earliest evolutionary phases is needed. The APEX Telescope Large Area Survey of the whole inner Galactic disk
Externí odkaz:
http://arxiv.org/abs/1708.07839
Autor:
Herpin, F., Baudry, A., Richards, A. M. S., Gray, M. D., Schneider, N., Menten, K. M., Wyrowski, F., Bontemps, S., Simon, R., Wiesemeyer, H.
Publikováno v:
A&A 606, A52 (2017)
The formation of massive stars is still not well understood. Accumulating a large amount of mass infalling within a single entity in spite of radiation pressure is possible if, among several other conditions, enough thermal energy is released. Despit
Externí odkaz:
http://arxiv.org/abs/1706.06390
Autor:
Elia, D., Molinari, S., Schisano, E., Pestalozzi, M., Pezzuto, S., Merello, M., Noriega-Crespo, A., Moore, T. J. T., Russeil, D., Mottram, J. C., Paladini, R., Strafella, F., Benedettini, M., Bernard, J. P., Di Giorgio, A., Eden, D. J., Fukui, Y., Plume, R., Bally, J., Martin, P. G., Ragan, S. E., Jaffa, S. E., Motte, F., Olmi, L., Schneider, N., Testi, L., Wyrowski, F., Zavagno, A., Calzoletti, L., Faustini, F., Natoli, P., Palmerim, P., Piacentini, F., Piazzo, L., Pilbratt, G. L., Polychroni, D., Baldeschi, A., Beltrán, M. T., Billot, N., Cambrésy, L., Cesaroni, R., García-Lario, P., Hoare, M. G., Huang, M., Joncas, G., Liu, S. J., Maiolo, B. M. T., Marsh, K. A., Maruccia, Y., Mège, P., Peretto, N., Rygl, K. L. J., Schilke, P., Thompson, M. A., Traficante, A., Umana, G., Veneziani, M., Ward-Thompson, D., Whitworth, A. P., Arab, H., Bandieramonte, M., Becciani, U., Brescia, M., Buemi, C., Bufano, F., Butora, R., Cavuoti, S., Costa, A., Fiorellino, E., Hajnal, A., Hayakawa, T., Kacsuk, P., Leto, P., Causi, G. Li, Marchili, N., Martinavarro-Armengol, S., Mercurio, A., Molinaro, M., Riccio, G., Sano, H., Sciacca, E., Tachihara, K., Torii, K., Trigilio, C., Vitello, F., Yamamoto, H.
Hi-GAL is a large-scale survey of the Galactic plane, performed with Herschel in five infrared continuum bands between 70 and 500 $\mu$m. We present a band-merged catalogue of spatially matched sources and their properties derived from fits to the sp
Externí odkaz:
http://arxiv.org/abs/1706.01046