I. Gallardo Cava
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View article: CO observations in rotating circumbinary post-AGB disks
CO observations in rotating circumbinary post-AGB disks Open
There is a group of post-asymptotic giant branch (post-AGB) stars that are part of a binary system and that show a significant infrared excess. It is by now well established that these systems have disks around the stellar system with eith…
View article: ALMA observations of CO isotopologues towards six obscured post-asymptotic giant branch stars
ALMA observations of CO isotopologues towards six obscured post-asymptotic giant branch stars Open
Context. Low- and intermediate-mass stars evolve through the asymptotic giant branch (AGB) when an efficient mass-loss process removes a significant fraction of their initial mass. For most sources, this mass-loss process relies on the int…
View article: ALMA observations of CO isotopologues towards six obscured post-AGB stars
ALMA observations of CO isotopologues towards six obscured post-AGB stars Open
Low- and intermediate-mass stars evolve through the asymptotic giant branch (AGB), when an efficient mass-loss process removes a significant fraction of their initial mass. A substantial increase in the mass-loss rate at the end of the AGB…
View article: The 17O/18O Ratio of Post-AGB Sources: Canonical and Non-Canonical Populations
The 17O/18O Ratio of Post-AGB Sources: Canonical and Non-Canonical Populations Open
Stellar evolution models serve as tools to derive stellar parameters from elemental and isotopic abundance ratios. For low-to-intermediate mass evolved stars, C/O, 12C/13C, and 17O/18O ratios are proxies of the initial mass, a largely unkn…
View article: Keplerian disks and outflows in binary post-AGB stars
Keplerian disks and outflows in binary post-AGB stars Open
There is a class of binary post-AGB stars that are surrounded by Keplerian disks and that often present outflows resulting from gas escaping from the disk. We present maps and complex models of 12CO and 13CO J=2-1 emission lines for four o…
View article: The nebula around the binary post-AGB star 89 Herculis
The nebula around the binary post-AGB star 89 Herculis Open
Context. 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 g…
View article: The nebula around the binary post-AGB star 89 Herculis
The nebula around the binary post-AGB star 89 Herculis Open
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 escapi…
View article: Rotating and Expanding Gas in Binary Post-AGB Stars
Rotating and Expanding Gas in Binary Post-AGB Stars Open
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 d…
View article: Rotating and Expanding Gas in Binary Post-AGB Stars
Rotating and Expanding Gas in Binary Post-AGB Stars Open
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 d…
View article: Chemistry of nebulae around binary post-AGB stars: A molecular survey of mm-wave lines
Chemistry of nebulae around binary post-AGB stars: A molecular survey of mm-wave lines Open
Context. There is a class of binary post-asymptotic giant branch (post-AGB) stars that exhibit remarkable near-infrared excess. Such stars are surrounded by Keplerian or quasi-Keplerian disks, as well as extended outflows composed of gas e…
View article: Keplerian disks and outflows in post-AGB stars: AC Herculis, 89 Herculis, IRAS 19125+0343, and R Scuti
Keplerian disks and outflows in post-AGB stars: AC Herculis, 89 Herculis, IRAS 19125+0343, and R Scuti Open
Context. 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 be…
View article: The CARMENES search for exoplanets around M dwarfs
The CARMENES search for exoplanets around M dwarfs Open
Context. Teegarden’s Star is the brightest and one of the nearest ultra-cool dwarfs in the solar neighbourhood. For its late spectral type (M7.0 V), the star shows relatively little activity and is a prime target for near-infrared radial v…
View article: The CARMENES search for exoplanets around M dwarfs. Two temperate Earth-mass planet candidates around Teegarden's Star
The CARMENES search for exoplanets around M dwarfs. Two temperate Earth-mass planet candidates around Teegarden's Star Open
Context. Teegarden's Star is the brightest and one of the nearest ultra-cool dwarfs in the solar neighbourhood. For its late spectral type (M7.0V), the star shows relatively little activity and is a prime target for near-infrared radial ve…