Results 71 to 80 of about 14,588 (266)
Age determination of galaxy merger remnant stars using asteroseismology [PDF]
Monthly notices of the Royal Astronomical Society, 2021 The Milky Way was shaped by the mergers with several galaxies in the past. We search for remnant stars that were born in these foreign galaxies and assess their ages in an effort to put upper limits on the merger times and thereby better understand the
C. C. Borre +14 more
semanticscholar +1 more source
Asteroseismology and magnetic cycles [PDF]
Astronomische Nachrichten, 2012 AbstractSmall cyclic variations in the frequencies of acoustic modes are expected to be a common phenomenon in solar‐like pulsators, as a result of stellar magnetic activity cycles. The frequency variations observed throughout the solar and stellar cycles contain information about structural changes that take place inside the stars as well as about ...
J. J. G. Lima +2 more
openaire +3 more sources
Tracking the Evolution of Lithium in Giants Using Asteroseismology: Super-Li-rich Stars Are Almost Exclusively Young Red-clump Stars [PDF]
Astrophysical Journal Letters, 2021 We report novel observational evidence on the evolutionary status of lithium-rich giant stars by combining asteroseismic and lithium abundance data. Comparing observations and models of the asteroseismic gravity-mode period spacing ΔΠ1, we find that ...
Raghubar Singh +4 more
semanticscholar +1 more source
Asteroseismology with the Kepler mission [PDF]
Communications in Asteroseismology, 2007 NASA's Kepler mission will fly a photometer based on a wide-field Schmidt camera with a 0.95 m aperture, staring at a single field continuously for at least 4 years. Although the mission's principal aim is to locate transiting extrasolar planets, it will provide an unprecedented opportunity to make asteroseismic observations on a wide variety of stars.
J. Christensen‐Dalsgaard
openalex +5 more sources
Pulsating stars and the Virtual Observatory
EPJ Web of Conferences, 2017 Virtual Observatory is one of the most used internet-based protocols in astronomy. It has become somewhat natural to find, manage, compare, visualize and download observations from very different archives of astronomical observations with no effort.
Suárez Juan Carlos
doaj +1 more source
Revisiting the δ Scuti star FG Virginis using Kepler K2 and TESS data
Frontiers in Astronomy and Space Sciences, 2022 FG Virginis is a δ Scuti variable star that was the target of several ground-based multisite photometric campaigns from 1992 to 2004. Over 75 pulsation frequencies were detected (Breger et al., Astron.
Joyce A. Guzik +3 more
doaj +1 more source
The Future of Computational Asteroseismology [PDF]
Communications in Asteroseismology, 2007 8 pages, 1 fig, Communications in Asteroseismology (invited review)
Τ. S. Metcalfe
openalex +5 more sources
Validation of the Gaia Early Data Release 3 Parallax Zero-point Model with Asteroseismology
Astronomical Journal, 2021 Gaia Early Data Release 3 (EDR3) provides trigonometric parallaxes for 1.5 billion stars, with reduced systematics compared to Gaia Data Release 2 and reported precisions better by up to a factor of 2.
J. Zinn
semanticscholar +1 more source
The Hot Limit of Solar-like Oscillations From Kepler Photometry
Frontiers in Astronomy and Space Sciences, 2020 Kepler short-cadence photometry of 2,347 stars with effective temperatures in the range 6,000–10,000 K was used to search for the presence of solar-like oscillations.
Luis A. Balona
doaj +1 more source
Observational asteroseismology of hot subdwarf stars [PDF]
, 2010 Hot subdwarf stars are particularly challenging for asteroseismology due to their rapid pulsation periods, intrinsic faintness and relative rarity both in the field and in clusters.
Østensen, Roy H.
core +1 more source