Zobrazeno 1 - 10
of 17
pro vyhledávání: '"Valentín Bujarrabal"'
Autor:
Elisa Masa, Javier Alcolea, Miguel Santander-García, Valentín Bujarrabal, Carmen Sánchez Contreras, Arancha Castro-Carrizo
Publikováno v:
Galaxies, Vol 12, Iss 5, p 63 (2024)
Ongoing improvements in the sensitivity of sub-mm- and mm-range interferometers and single-dish radio telescopes allow for the increasingly detailed study of AGB and post-AGB objects in molecular species other than CO12 and CO13. With a new update in
Externí odkaz:
https://doaj.org/article/5a47883c700c40b3ae3b514eaa4e251f
Autor:
José Pablo Fonfría, Carmen Sánchez Contreras, Daniel Tafoya, Patricia Fernández-Ruiz, Arancha Castro-Carrizo, Javier Alcolea, Valentín Bujarrabal
Publikováno v:
Galaxies, Vol 12, Iss 5, p 62 (2024)
Proto- and young planetary nebulae comprise dense circumstellar envelopes made of molecular gas and dust, some of which hide compact ionized cores that host stellar systems with hot objects, and show high-velocity bipolar outflows launched from insid
Externí odkaz:
https://doaj.org/article/7cf1ab1ed3e04793b6d194c763b4967c
Autor:
Javier Alcolea, Marcelino Agúndez, Valentín Bujarrabal, Arancha Castro-Carrizo, Jean-François Desmurs, John-Eduard Martínez-Fernández, Carmen Sánchez Contreras, Miguel Santander-García
Publikováno v:
Galaxies, Vol 10, Iss 2, p 47 (2022)
PN M 1–92, also known as Minkowski’s Footprint, is a textbook example of a massive pre-planetary nebula. It presents all the characteristics of this type of source: non-spherical symmetry (bipolar cylindrical symmetry in this case), high-velocity
Externí odkaz:
https://doaj.org/article/5b526b2563a844b0a41c000ce64390a1
Publikováno v:
Galaxies, Vol 10, Iss 1, p 26 (2022)
Close binary evolution is widely invoked to explain the formation of axisymmetric planetary nebulae after a brief common envelope phase. The evolution of the primary would be interrupted abruptly, its still quite massive envelope being fully ejected
Externí odkaz:
https://doaj.org/article/9359763aa6ee44d6a53091ebc64a4340
Publikováno v:
Galaxies, Vol 6, Iss 3, p 94 (2018)
We present recent Atacama Large Millimeter/submillimeter Array (ALMA)-based studies of circumstellar envelopes (CSEs) around Asymptotic Giant Branch (AGB) stars and pre-Planetary Nebulae (pPNe). In only a few years of operation, ALMA is revolutionisi
Externí odkaz:
https://doaj.org/article/a13164f7c8d14ddba6b800af93a45aad
Autor:
Luis Velilla-Prieto, Javier Alcolea, Valentín Bujarrabal, Arancha Castro-Carrizo, Hans Olofsson, Wouter Vlemmings, Theo Khouri, Marcelino Agúndez
Among the different types of evolved stars, some post-AGBs experience fast shocks that disrupt their circumstellar envelopes activating a complex chemistry, resembling that of young stellar objects, which is poorly characterized. The CHIPS project ai
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b5d6a87da7a6c4309a173a308f35eb78
Autor:
Iván Gallardo Cava, Valentín Bujarrabal, Javier Alcolea, Miguel Gómez-Garrido, Arancha Castro-Carrizo, Hans Van Winckel, Miguel Santander-García
Publikováno v:
Astronomy; Volume 1; Issue 2; Pages: 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:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::04603e203f15133ed9bce250696a0f2a
http://arxiv.org/abs/2208.02846
http://arxiv.org/abs/2208.02846
Publikováno v:
Science with the Atacama Large Millimeter Array ISBN: 9781402069345
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::110e0d1a87dd175628c037d63615d7ff
https://doi.org/10.1007/978-1-4020-6935-2_42
https://doi.org/10.1007/978-1-4020-6935-2_42
Autor:
Valentín Bujarrabal
Publikováno v:
Science with the Atacama Large Millimeter Array ISBN: 9781402069345
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::02812555e53b24625eeb511f340d7ed4
https://doi.org/10.1007/978-1-4020-6935-2_38
https://doi.org/10.1007/978-1-4020-6935-2_38
Autor:
Valentín Bujarrabal
Publikováno v:
Mass-Losing Pulsating Stars and their Circumstellar Matter ISBN: 9789401039680
Observations of molecular line emission in circumstellar envelopes around AGB and post-AGB stars are the best tool to measure a number of circumstellar gas parameters: total mass, present or past mass-loss rate, expansion velocity, shape, chemical co
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::626f009e03c5c3bb43726c8f0f873c8f
https://doi.org/10.1007/978-94-010-0139-7_65
https://doi.org/10.1007/978-94-010-0139-7_65