Zobrazeno 1 - 10
of 333
pro vyhledávání: '"Nyman, L.-Å."'
Autor:
Khouri, T., Olofsson, H., Vlemmings, W. H. T., Schirmer, T., Tafoya, D., Maercker, M., De Beck, E., Nyman, L. -Å., Saberi, M.
The mass loss experienced on the asymptotic giant branch (AGB) at the end of the lives of low- and intermediate-mass stars is widely accepted to rely on radiation pressure acting on dust grains formed in the extended AGB atmospheres. The interaction
Externí odkaz:
http://arxiv.org/abs/2402.13676
Autor:
Unnikrishnan, R., De Beck, E., Nyman, L. A., Olofsson, H., Vlemmings, W. H. T., Tafoya, D., Maercker, M., Charnley, S. B., Cordiner, M. A., de Gregorio, I., Humphreys, E., Millar, T. J., Rawlings, M. G.
AGB stars are major contributors to the chemical enrichment of the ISM through nucleosynthesis and extensive mass loss. Most of our current knowledge of AGB atmospheric and circumstellar chemistry, in particular in a C-rich environment, is based on o
Externí odkaz:
http://arxiv.org/abs/2312.10014
Autor:
Mendoza, E., Duronea, N., Ronsó, D., Corazza, L. C., van der Tak, F., Paron, S., Nyman, L. -Å.
This paper presents a review of ideas that interconnect Astrochemistry and Galactic Dynamics. Since these two areas are vast and not recent, each one has already been covered separately by several reviews. After a general historical introduction, and
Externí odkaz:
http://arxiv.org/abs/2105.10628
Autor:
Olofsson, H., Black, J. H., Khouri, T., Vlemmings, W. H. T., Humphreys, E. M. L., Lindqvist, M., Maercker, M., Nyman, L., Ramstedt, S., Tafoya, D.
We report the detection of two lines at millimetre wavelengths towards the immediate surroundings of the post-giant and most likely post-common-envelope star HD101584 using high-angular-resolution ALMA observations. The circumstellar environment of t
Externí odkaz:
http://arxiv.org/abs/2105.00699
We present images of $\eta$ Carinae in the recombination lines H30$\alpha$ and He30$\alpha$ and the underlying continuum with 50~mas resolution (110 AU), obtained with ALMA. For the first time, the 230 GHz continuum image is resolved into a compact c
Externí odkaz:
http://arxiv.org/abs/2009.10829
Autor:
Duronea, N. U., Bronfman, L., Mendoza, E., Merello, M., Finger, R., Reyes, N., Hervías-Caimapo, C., Faure, A., Cappa, C. E., Arnal, E. M., Lépine, J. R. D., Kleiner, I., Nyman, L-Ä
Using APEX-1 and APEX-2 observations, we have detected and studied the rotational lines of the HC$_3$N molecule (cyanoacetylene) in the powerful outflow/hot molecular core G331.512-0.103. We identified thirty-one rotational lines at $J$ levels betwee
Externí odkaz:
http://arxiv.org/abs/1907.09479
Autor:
Olofsson, H., Khouri, T., Maercker, M., Bergman, P., Doan, L., Tafoya, D., Vlemmings, W. H. T., Humphreys, E. M. L., Lindqvist, M., Nyman, L., Ramstedt, S.
We have performed a study of the characteristics of the circumstellar environment of the binary object HD101584, that provides information on a likely evolutionary scenario. We have obtained and analysed ALMA observations, complemented with observati
Externí odkaz:
http://arxiv.org/abs/1902.02153
Autor:
Figueira, M., López-Calderón, C., Bronfman, L., Zavagno, A., Hervías-Caimapo, C., Duronea, N., Nyman, L-Å.
Publikováno v:
A&A 623, A141 (2019)
Star-forming regions are usually studied in the context of Galactic surveys, but dedicated observations are sometimes needed when the study reaches beyond the survey area. Here, we studied the G345.5+1.5 region, which is located slightly above the Ga
Externí odkaz:
http://arxiv.org/abs/1901.10905
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Akademický článek
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