Results 51 to 60 of about 20,344 (216)
HST observations of the LMC field around SN87A: distance determinations with Red Clump and Tip of the Red Giant Branch stars [PDF]
, 1999 We have used HST-WFPC2 multiband observations of a field around SN 1987A in the Large Magellanic Cloud to measure its distance from the Sun. The observations allowed us to carefully determine the interstellar extinction along the line of sight to a large
Bessel M. S. +10 more
core +2 more sources
A New Color-Magnitude Diagram for Palomar 11 [PDF]
, 2006 We present new photometry for the Galactic thick disk globular cluster Palomar 11 extending well past the main sequence turn-off in the V and I bands. This photometry shows noticeable red giant and subgiant branches.
Brian Chaboyer +8 more
core +4 more sources
Red giant seismology: Observations
EPJ Web of Conferences, 2013 The CoRoT and Kepler missions provide us with thousands of red-giant light curves that allow a very precise asteroseismic study of these objects. Before CoRoT and Kepler, the red-giant oscillation patterns remained obscure.
Mosser B.
doaj +1 more source
Comparison of the Asteroseismic Mass Scale of Red Clump Giants with Photometric Mass Estimates [PDF]
The Astrophysical Journal, 2019 Abstract Asteroseismology can provide joint constraints on masses and radii of individual stars. While this approach has been extensively tested for red giant branch (RGB) stars, it has been more difficult to test for helium core–burning red clump (RC) giants because of the lack of fundamental calibrators.
Deokkeun An +3 more
openalex +4 more sources
HD 16771: A lithium-rich giant in the red-clump stage [PDF]
Astronomy & Astrophysics, 2016 Aims: We report the discovery of a young lithium rich giant, HD 16771, in the core-helium burning phase that does not seem to fit existing proposals of Li synthesis near the luminosity function bump or during He-core flash. We aim to understand the nature of Li enrichment in the atmosphere of HD 16771 by exploring various Li enhancement scenarios ...
Reddy, Arumalla B. S., Lambert, David L.
openaire +2 more sources
Asteroseismology of red-clump stars with CoRoT and Kepler [PDF]
, 2009 The availability of asteroseismic constraints for a large number of red giants with CoRoT and in the near future with Kepler, paves the way for detailed studies of populations of galactic-disk red giants.
A. Miglio +6 more
core +1 more source
Asteroseismology of the open clusters NGC 6791, NGC 6811, and NGC 6819 from nineteen months of Kepler photometry [PDF]
, 2012 We studied solar-like oscillations in 115 red giants in the three open clusters NGC 6791, NGC 6811, and NGC 6819, based on photometric data covering more than 19 months with NASA's Kepler space telescope.
Alfio Bonanno +49 more
core +4 more sources
From the Inner to Outer Milky Way: A Photometric Sample of 2.6 Million Red Clump Stars
, 2020 Large pristine samples of red clump stars are highly sought after given that they are standard candles and give precise distances even at large distances.
Hawkins, Keith +3 more
core +1 more source
Red Clump stars in Kepler open cluster NGC 6819
EPJ Web of Conferences, 2015 We measure the large frequency separation, Δν, and the frequency of maximum amplitude, νmax, for 10 Red Clump (RC) single member (SM) stars in the Kepler open cluster NGC 6819. We derive luminosities and masses for each individual RC star.
Abedigamba O.P. +2 more
doaj +1 more source
The Astrophysical Journal, 2023 Carbon-deficient red giants (CDGs) are a peculiar class of stars that have eluded explanation for decades. We aim to better characterize CDGs by using asteroseismology (Kepler, TESS) combined with spectroscopy (APOGEE, LAMOST), and astrometry (Gaia).
Sunayana Maben +4 more
doaj +1 more source