Galactic calibration of the tip of the red giant branch
Sign Up to like & getrecommendations! Published in 2019 at "Publications of the Astronomical Society of Australia"
DOI: 10.1017/pasa.2018.46
Abstract: Abstract Indications from Gaia data release 2 are that the tip of the red giant branch (a population II standard candle related to the helium flash in low mass stars) is close to –4 in… read more here.
Keywords: red giant; giant branch; calibration tip; tip red ... See more keywords
Automated approach to measure stellar inclinations: validation through large-scale measurements on the red giant branch
Sign Up to like & getrecommendations! Published in 2020 at "Astronomy and Astrophysics"
DOI: 10.1051/0004-6361/202039285
Abstract: Measuring stellar inclinations is fundamental to understand planetary formation and dynamics as well as physical conditions during star formation. Oscillation spectra of red giant stars exhibit mixed modes that have both a gravity component from… read more here.
Keywords: giant branch; measure stellar; stellar inclinations; red giant ... See more keywords
Mirror principle and the red-giant bump: the battle of entropy in low-mass stars
Sign Up to like & getrecommendations! Published in 2020 at "Monthly Notices of the Royal Astronomical Society"
DOI: 10.1093/mnras/staa176
Abstract: The evolution of low-mass stars into red giants is still poorly understood. During this evolution the core of the star contracts and, simultaneously, the envelope expands -- a process known as the `mirror'. Additionally, there… read more here.
Keywords: mass stars; luminosity; red giant; low mass ... See more keywords
KOI-3890: a high-mass-ratio asteroseismic red giant+M-dwarf eclipsing binary undergoing heartbeat tidal interactions
Sign Up to like & getrecommendations! Published in 2019 at "Monthly Notices of the Royal Astronomical Society"
DOI: 10.1093/mnras/stz1185
Abstract: KOI-3890 is a highly eccentric, 153-d period eclipsing, single-lined spectroscopic binary system containing a red giant star showing solar-like oscillations alongside tidal interactions. The combination of transit photometry, radial velocity observations, and asteroseismology has enabled… read more here.
Keywords: system; asteroseismology; mass; dwarf ... See more keywords
Common envelope evolution on a moving mesh
Sign Up to like & getrecommendations! Published in 2019 at "Monthly Notices of the Royal Astronomical Society"
DOI: 10.1093/mnras/stz1219
Abstract: We outline the methodology of simulating common envelope evolution (CEE) with the moving-mesh code manga. We extend manga to include multiple time-steps. This provides substantial speedups for problems with large dynamic range. We describe the… read more here.
Keywords: common envelope; envelope; red giant; envelope evolution ... See more keywords