Results 61 to 70 of about 1,000,727 (374)

Overshoot in Giant Stars

open access: yes, 1999
6 pages, 4 figures, conference paper: 35th Liege Int.
Herwig, Falk, Blöcker, Thomas
openaire   +3 more sources

Hydrodynamics and Survivability during Post-main-sequence Planetary Engulfment

open access: yesThe Astrophysical Journal, 2023
The engulfment of substellar bodies (SBs), such as brown dwarfs and planets, by giant stars is a possible explanation for rapidly rotating giants, lithium-rich giants, and the presence of SBs in close orbits around subdwarfs and white dwarfs.
Ricardo Yarza   +8 more
doaj   +1 more source

Impact of the extinct megaherbivore Steller's sea cow (Hydrodamalis gigas) on kelp forest resilience

open access: yesFrontiers in Ecology and Evolution, 2022
Giant kelp forests off the west coast of North America are maintained primarily by sea otter (Enhydra lutris) and sunflower sea star (Pycnopodia helianthoides) predation of sea urchins.
Peter D. Roopnarine   +4 more
doaj   +1 more source

Can Life develop in the expanded habitable zones around Red Giant Stars?

open access: yes, 2005
We present some new ideas about the possibility of life developing around sub-giant and red giant stars. Our study concerns the temporal evolution of the habitable zone.
Brack A.   +16 more
core   +3 more sources

Kepler-432: a red giant interacting with one of its two long period giant planets [PDF]

open access: yes, 2015
We report the discovery of Kepler-432b, a giant planet ($M_b = 5.41^{+0.32}_{-0.18} M_{\rm Jup}, R_b = 1.145^{+0.036}_{-0.039} R_{\rm Jup}$) transiting an evolved star $(M_\star = 1.32^{+0.10}_{-0.07} M_\odot, R_\star = 4.06^{+0.12}_{-0.08} R_\odot ...
Aguirre, Victor Silva   +31 more
core   +2 more sources

A magnetically driven origin for the low luminosity GRB 170817A associated with GW170817

open access: yes, 2018
The gamma-ray burst GRB 170817A associated with GW170817 is subluminous and subenergetic compared with other typical short GRBs. It may be due to a relativistic jet viewed off-axis, or a structured jet, or cocoon emission. Giant flares from magnetars may
Huang, L., Tong, H., Yu, C.
core   +1 more source

WASP 1628+10 – an EL CVn-type binary with a very low mass stripped red giant star and multiperiodic pulsations [PDF]

open access: yes, 2014
The star 1SWASP J162842.31+101416.7 (WASP 1628+10) is one of several EL CVn-type stars recently identified using the Wide Angle Search for Planets (WASP) data base, i.e. an eclipsing binary star in which an A-type dwarf star (WASP 1628+10 A) eclipses the
P. Maxted   +10 more
semanticscholar   +1 more source

A giant exoplanet orbiting a very-low-mass star challenges planet formation models [PDF]

open access: yesScience, 2019
A small star hosts a big planet M dwarfs, the most common type of star, are low-mass objects that emit most of their faint light in the near-infrared, making it difficult to detect any orbiting exoplanets. Morales et al.
J. C. Morales   +209 more
semanticscholar   +1 more source

The Primordial Abundance of $^6$Li and $^9$be [PDF]

open access: yes, 1994
Light element ($^6$Li, $^7$Li and $^9$Be) depletion isochrones for halo stars have been calculated with standard stellar evolution models. These models include the latest available opacities and are computed through the sub-giant branch. If $^6$Li is not
Chaboyer, Brian
core   +2 more sources

POSSIBLE ORIGIN OF THE G2 CLOUD FROM THE TIDAL DISRUPTION OF A KNOWN GIANT STAR BY SGR A* [PDF]

open access: yes, 2014
The discovery of the gas cloud G2 on a near-radial orbit about Sgr A* has prompted much speculation on its origin. In this Letter, we propose that G2 formed out of the debris stream produced by the removal of mass from the outer envelope of a nearby ...
J. Guillochon   +3 more
semanticscholar   +1 more source

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