Zobrazeno 1 - 10
of 48
pro vyhledávání: '"Contreras, C. Sanchez"'
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
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:
Contreras, C. Sánchez, Báez-Rubio, A., Alcolea, J., Castro-Carrizo, A., Bujarrabal, V., Martín-Pintado, J., Tafoya, D.
Publikováno v:
A&A 629, A136 (2019)
We present interferometric observations with the Atacama Large Millimeter Array (ALMA) of the free-free continuum and recombination line emission at 1 and 3mm of the "Red Square Nebula" surrounding the B[e]-type star MWC922. The unknown distance to t
Externí odkaz:
http://arxiv.org/abs/1907.06415
Publikováno v:
A&A 622, A123 (2019)
This is the second paper of a series making use of Herschel/PACS spectroscopy of evolved stars in the THROES catalogue to study the inner regions of their circumstellar envelopes (CSEs). We analyze the CO emission spectra, including a large number of
Externí odkaz:
http://arxiv.org/abs/1812.07815
Autor:
Contreras, C. Sánchez, Alcolea, J., Castro-Carrizo, A., Velilla-Prieto, L., Santander-García, M., Quintana-Lacaci, G., Cernicharo, J.
We present continuum and molecular line emission ALMA observations of OH 231.8+4.2, a well studied bipolar nebula around an asymptotic giant branch (AGB) star. The high angular resolution (~0.2-0.3 arcsec) and sensitivity of our ALMA maps provide the
Externí odkaz:
http://arxiv.org/abs/1809.00619
Autor:
Fonfría, J. P., Fernández-López, M., Pardo, J. R., Agúndez, M., Contreras, C. Sánchez, Prieto, L. Velilla, Cernicharo, J., Santander-García, M., Quintana-Lacaci, G., Castro-Carrizo, A., Curiel, S.
We present new high angular resolution interferometer observations of the v=0 J=14-13 and 15-14 SiS lines towards IRC+10216, carried out with CARMA and ALMA. The maps, with angular resolutions of ~0.25"and 0.55", reveal (1) an extended, roughly unifo
Externí odkaz:
http://arxiv.org/abs/1805.05218
Autor:
Sahai, R., Contreras, C. Sánchez, Mangan, A., Sanz-Forcada, J., Muthumariappan, C., Claussen, M. J.
Binarity is believed to dramatically affect the history and geometry of mass loss in AGB and post-AGB stars, but observational evidence of binarity is sorely lacking. As part of a project to search for hot binary companions to cool AGB stars using th
Externí odkaz:
http://arxiv.org/abs/1805.03301
Autor:
Bujarrabal, V., Castro-Carrizo, A., Van Winckel, H., Alcolea, J., Contreras, C. Sanchez, Santander-Garcia, M., Hillen, M.
Publikováno v:
A&A 614, A58 (2018)
We are studying a class of binary post-AGB stars that seem to be systematically surrounded by equatorial disks and slow outflows. Although the rotating dynamics had only been well identified in three cases, the study of such structures is thought to
Externí odkaz:
http://arxiv.org/abs/1802.04019
Autor:
Ramos-Medina, J., Contreras, C. Sánchez, García-Lario, P., Rodrigo, C., Santos, J. da Silva, Solano, E.
This is the first of a series of papers presenting the THROES (A caTalogue of HeRschel Observations of Evolved Stars) project, intended to provide a comprehensive overview of the spectroscopic results obtained in the far-infrared (55-670 microns) wit
Externí odkaz:
http://arxiv.org/abs/1711.05992