Zobrazeno 1 - 10
of 367
pro vyhledávání: '"Castro-Carrizo, A."'
Autor:
Contreras, C. Sánchez, Tafoya, D., Fonfría, J. P., Alcolea, J., Castro-Carrizo, A., Bujarrabal, V.
We report on recent results from our successful and pioneering observational program with ALMA to study emerging ultracom pact HII regions of pre-Planetary Nebulae (pPNe) using mm-wavelength recombination lines (mRRLs) as new optimal tracers. We focu
Externí odkaz:
http://arxiv.org/abs/2312.04188
Autor:
Bujarrabal, V., Alcolea, J., Castro-Carrizo, A., Kluska, J., Contreras, C. Sanchez, Van Winckel, H.
We aim to study the dust distribution in the central regions of the Keplerian disk of the Red Rectangle, the prototype of binary post-AGB stars with rotating circumbinary disks, and to compare it with the distribution of relevant molecular gas tracer
Externí odkaz:
http://arxiv.org/abs/2309.07622
Publikováno v:
A&A 671, A80 (2023)
There is a class of binary post-asymptotic giant branch (post-AGB) stars that exhibit remarkable near-infrared (NIR) excess. These stars are surrounded by disks with Keplerian or quasi-Keplerian dynamics and outflows composed of gas escaping from the
Externí odkaz:
http://arxiv.org/abs/2301.06965
Autor:
Quintana-Lacaci, G., Velilla-Prieto, L., Agúndez, M., Fonfría, J. P., Cernicharo, J., Decin, L., Castro-Carrizo, A.
Publikováno v:
A&A 669, A56 (2023)
Red supergiant stars (RSGs, Minit = 10-40Msun) are known to eject large amounts of material, as much as half of their initial mass during this evolutionary phase. However, the processes powering the mass ejection in low- and intermediate-mass stars d
Externí odkaz:
http://arxiv.org/abs/2210.16135
Autor:
Cava, I. Gallardo, Bujarrabal, V., Alcolea, J., Gómez-Garrido, M., Castro-Carrizo, A., Van Winckel, H., Santander-García, M.
Publikováno v:
Astronomy 2022, 1(2), 84-92
There is a class of binary post-AGB stars (binary system including a post-AGB star) that are surrounded by Keplerian disks and outflows resulting from gas escaping from the disk. To date, there are seven sources that have been studied in detail throu
Externí odkaz:
http://arxiv.org/abs/2208.02846
Autor:
Contreras, C. Sánchez, Alcolea, J., Cardoso, R. Rodríguez, Bujarrabal, V., Castro-Carrizo, A., Quintana-Lacaci, G., Velilla-Prieto, L., Santander-García, M.
Publikováno v:
A&A 665, A88 (2022)
We present ALMA continuum and molecular line emission maps at $\sim$1 mm of OH 231.8, a well studied bipolar nebula around an AGB star. The excellent angular resolution of our maps ($\sim$20 mas) allows us to scrutinise the central nebular regions of
Externí odkaz:
http://arxiv.org/abs/2206.12185
Autor:
Wootten, Alwyn, Bentley, Rory O., Baldwin, J., Combes, F., Fabian, A. C., Ferland, G. J., Loh, E., Salome, P., Shingledecker, C. N., Castro-Carrizo, A.
Molecular emission was imaged with ALMA from numerous components near and within bright H2-emitting knots and absorbing dust globules in the Crab Nebula. These observations provide a critical test of how energetic photons and particles produced in a
Externí odkaz:
http://arxiv.org/abs/2111.06033
Autor:
Bujarrabal, V., Agundez, M., Gomez-Garrido, M., Kim, Hyosun, Santander-Garcia, M., Alcolea, J., Castro-Carrizo, A., Mikolajewska, J.
Publikováno v:
A&A 651, A4 (2021)
We investigate the structure, dynamics, and chemistry of the molecule-rich nebula around the stellar symbiotic system R Aqr, which is significantly affected by the presence of a white dwarf (WD) companion. We study the effects of the strong dynamical
Externí odkaz:
http://arxiv.org/abs/2105.07687
Autor:
Cava, I. Gallardo, Gómez-Garrido, M., Bujarrabal, V., Castro-Carrizo, A., Alcolea, J., Van Winckel, H.
Publikováno v:
A&A 648, A93 (2021)
There is a class of binary post-AGB stars with a remarkable near-infrared excess that are surrounded by Keplerian or quasi-Keplerian disks and extended outflows composed of gas escaping from the disk. The Keplerian dynamics had been well identified i
Externí odkaz:
http://arxiv.org/abs/2103.08279
Autor:
Velilla-Prieto, L., Cernicharo, J., Agúndez, M., Fonfría, J. P., Quintana-Lacaci, G., Marcelino, N., Castro-Carrizo, A.
Publikováno v:
A&A 629, A146 (2019)
The study of the gas in the envelopes surrounding asymptotic giant branch (AGB) stars through observations in the millimetre wavelength range provides information about the history and nature of these molecular factories. Here we present ALMA observa
Externí odkaz:
http://arxiv.org/abs/1908.05652