Zobrazeno 1 - 10
of 260
pro vyhledávání: '"Posch, T."'
Autor:
Decin, L., Royer, P., Cox, N. L. J., Vandenbussche, B., Ottensamer, R., Blommaert, J. A. D. L., Groenewegen, M. A. T., Barlow, M. J., Lim, T., Kerschbaum, F., Posch, T., Waelkens, C.
Publikováno v:
2011, Astronomy & Astrophysics 534, A1
We present new Herschel/PACS images at 70, 100, and 160 micron of the well-known, nearby, carbon-rich asymptotic giant branch star IRC+10216 revealing multiple dust shells in its circumstellar envelope. For the first time, dust shells (or arcs) are d
Externí odkaz:
http://arxiv.org/abs/1210.3483
Autor:
Decin, L., Agundez, M., Barlow, M. J., Daniel, F., Cernicharo, J., Lombaert, R., De Beck, E., Royer, P., Vandenbussche, B., Wesson, R., Polehampton, E. T., Blommaert, J. A. D. L., De Meester, W., Exter, K., Feuchtgruber, H., Gear, W. K., Gomez, H. L., Groenewegen, M. A. T., Guelin, M., Hargrave, P. C., Huygen, R., Imhof, P., Ivison, R. J., Jean, C., Kahane, C., Kerschbaum, F., Leeks, S. J., Lim, T., Matsuura, M., Olofsson, G., Posch, T., Regibo, S., Savini, G., Sibthorpe, B., Swinyard, B. M., Yates, J. A., Waelkens, C.
Publikováno v:
Nature 467, 64-67; published on September 2, 2010
In 2001, the discovery of circumstellar water vapour around the ageing carbon star IRC+10216 was announced. This detection challenged the current understanding of chemistry in old stars, since water vapour was predicted to be absent in carbon-rich st
Externí odkaz:
http://arxiv.org/abs/1104.2316
Autor:
Groenewegen, M. A. T., Waelkens, C., Barlow, M. J., Kerschbaum, F., Garcia-Lario, P., Cernicharo, J., Blommaert, J. A. D. L., Bouwman, J., Cohen, M., Cox, N., Decin, L., Exter, K., Gear, W. K., Gomez, H. L., Hargrave, P. C., Henning, Th., Hutsemékers, D., Ivison, R. J., Jorissen, A., Krause, O., Ladjal, D., Leeks, S. J., Lim, T. L., Matsuura, M., Nazé, Y., Olofsson, G., Ottensamer, R., Polehampton, E., Posch, T., Rauw, G., Royer, P., Sibthorpe, B., Swinyard, B. M., Ueta, T., Vamvatira-Nakou, C., Vandenbussche, B., Van de Steene, G. C., Van Eck, S., van Hoof, P. A. M., Van Winckel, H., Verdugo, E., Wesson, R.
Publikováno v:
A&A, 526, A162 (18p, 2011)
MESS (Mass-loss of Evolved StarS) is a Guaranteed Time Key Program that uses the PACS and SPIRE instruments on board the Herschel Space Observatory to observe a representative sample of evolved stars, that include asymptotic giant branch (AGB) and po
Externí odkaz:
http://arxiv.org/abs/1012.2701
Autor:
de Vries, B. L., Klotz, D., Lombaert, R., Baier, A., Blommaert, J. A. D. L., Decin, L., Kerschbaum, F., Nowotny, W., Posch, T., Van Winckel, H., Groenewegen, M. A. T., Ueta, T., Van de Steene, G., Vandenbussche, B., Royer, P., Waelkens, C.
In this article we present the detection of the 69 {\mu}m band of the crystalline olivine forsterite within the MESS key program of Herschel. We determine the temperature of the forsterite grains by fitting the 69 {\mu}m band.
Comment: Conferenc
Comment: Conferenc
Externí odkaz:
http://arxiv.org/abs/1011.1126
Autor:
Decin, L., Cernicharo, J., Barlow, M. J., Royer, P., Vandenbussche, B., Wesson, R., Polehampton, E. T., De Beck, E., Agúndez, M., Blommaert, J. A. D. L., Cohen, M., Daniel, F., De Meester, W., Exter, K., Feuchtgruber, H., Fonfria, J. P., Gear, W. K., Goicoechea, J. R., Gomez, H. L., Groenewegen, M. A. T., Hargrave, P. C., Huygen, R., Imhof, P., Ivison, R. J., Jean, C., Kerschbaum, F., Leeks, S. J., Lim, T., Matsuura, M., Olofsson, G., Posch, T., Regibo, S., Savini, G., Sibthorpe, B., Swinyard, B. M., Tercero, B., Waelkens, C., Witherick, D. K., Yates, J. A.
The interstellar medium is enriched primarily by matter ejected from evolved low and intermediate mass stars. The outflows from these stars create a circumstellar envelope in which a rich gas-phase and dust-nucleation chemistry takes place. We observ
Externí odkaz:
http://arxiv.org/abs/1005.4675
Autor:
Cernicharo, J., Decin, L., Barlow, M. J., Agundez, M., Royer, P., Vandenbussche, B., Wesson, R., Polehampton, E. T., De Beck, E., Blommaert, J. A. D. L., Daniel, F., De Meester, W., Exter, K. M., Feuchtgruber, H., Gear, W. K., Goicoechea, J. R., Gomez, H. L., Groenewegen, M. A. T., Hargrave, P. C., Huygen, R., Imhof, P., Ivison, R. J., Jean, C., Kerschbaum, F., Leeks, S. J., Lim, T. L., Matsuura, M., Olofsson, G., Posch, T., Regibo, S., Savini, G., Sibthorpe, B., Swinyard, B. M., Waelkens, C.
We report on the detection of anhydrous hydrochloric acid (hydrogen chlorine, HCl) in the carbon-rich star IRC+10216 using the spectroscopic facilities onboard the Herschel satellite. Lines from J=1-0 up to J=7-6 have been detected. From the observed
Externí odkaz:
http://arxiv.org/abs/1005.4220
Autor:
Royer, P., Decin, L., Wesson, R., Barlow, M. J., Polehampton, E. T., Matsuura, M., Agundez, M., Blommaert, J. A. D. L., Cernicharo, J., Cohen, M., Daniel, F., Degroote, P., De Meester, W., Exter, K., Feuchtgruber, H., Gear, W. K., Gomez, H. L., Groenewegen, M. A. T., Hargrave, P. C., Huygen, R., Imhof, P., Ivison, R. J., Jean, C., Kerschbaum, F., Leeks, S. J., Lim, T., Lombaert, R., Olofsson, G., Posch, T., Regibo, S., Savini, G., Sibthorpe, B., Swinyard, B. M., Vandenbussche, B., Waelkens, C., Witherick, D. K., Yates, J. A.
With a luminosity > 10^5 Lsun and a mass-loss rate of about 2.10-4 Msun/yr, the red supergiant VY CMa truly is a spectacular object. Because of its extreme evolutionary state, it could explode as supernova any time. Studying its circumstellar materia
Externí odkaz:
http://arxiv.org/abs/1005.2952
Autor:
Kerschbaum, F., Ladjal, D., Ottensamer, R., Groenewegen, M. A. T., Mecina, M., Blommaert, J. A. D. L., Baumann, B., Decin, L., Vandenbussche, B., Waelkens, C., Posch, T., Huygen, E., De Meester, W., Regibo, S., Royer, P., Exter, K., Jean, C.
Detached circumstellar dust shells are detected around three carbon variables using Herschel-PACS. Two of them are already known on the basis of their thermal CO emission and two are visible as extensions in IRAS imaging data. By model fits to the ne
Externí odkaz:
http://arxiv.org/abs/1005.2689
Autor:
Ladjal, D., Barlow, M. J., Groenewegen, M. A. T., Ueta, T., Blommaert, J. A. D. L., Cohen, M., Decin, L., De Meester, W., Exter, K., Gear, W. K., Gomez, H. L., Hargrave, P. C., Huygen, R., Ivison, R. J., Jean, C., Kerschbaum, F., Leeks, S. J., Lim, T. L., Olofsson, G., Polehampton, E., Posch, T., Regibo, S., Royer, P., Sibthorpe, B., Swinyard, B. M., Vandenbussche, B., Waelkens, C., Wesson, R.
Herschel PACS and SPIRE images have been obtained over a 30'x30' area around the well-known carbon star CW Leo (IRC +10 216). An extended structure is found in an incomplete arc of ~22' diameter, which is cospatial with the termination shock due to i
Externí odkaz:
http://arxiv.org/abs/1005.1433
Publikováno v:
Astrophys.J.653:L145-L148,2006
We observed mid-infrared (7.5-22 mum) spectra of AGB stars in the globular cluster 47 Tuc with the Spitzer telescope and find significant dust features of various types. Comparison of the characteristics of the dust spectra with the location of the s
Externí odkaz:
http://arxiv.org/abs/astro-ph/0611167