Results 21 to 30 of about 63,862 (294)
Elemental Abundances in the X-Ray Gas of Early-Type Galaxies with XMM and Chandra Observations [PDF]
, 2009 The source of hot gas in elliptical galaxies is thought to be due to stellar mass loss, with contributions from supernova events and possibly from infall from a surrounding environment.
Alex Athey +28 more
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Abundances in Stellar Populations [PDF]
Symposium - International Astronomical Union, 1976 Stellar abundances are reviewed with emphasis on large-scale effects which may yield clues to galactic structure and evolution. Spectroscopic and indirect photoelectric abundance criteria are discussed, and utilized.The abundance statistics of nearby galactic disk stars, dominated by M dwarfs, but observed at spectral types F and GV and K III, suggest ...
openaire +1 more source
Nitrogen Production in Starburst Galaxies Detected by GALEX [PDF]
, 2007 We investigate the production of nitrogen in star-forming galaxies with ultraviolet (UV) radiation detected by the Galaxy Evolution Explorer Satellite (GALEX).
Barlow, Tom A. +24 more
core +5 more sources
Chemical abundances of the Typhon stellar stream
Monthly Notices of the Royal Astronomical Society, 2022 ABSTRACT We present the first high-resolution chemical abundances of seven stars in the recently discovered high-energy stream Typhon. Typhon stars have apocentres r ≳ 100 kpc, making this the first detailed chemical picture of the Milky Way’s very distant stellar halo.
Alexander P Ji +4 more
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Constraining planet structure from stellar chemistry: the cases of CoRoT-7, Kepler-10, and Kepler-93 [PDF]
, 2015 We explore the possibility that the stellar relative abundances of different species can be used to constrain the bulk abundances of known transiting rocky planets.
Adibekyan, V. +12 more
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Stellar Abundance Observations
, 1998 10 pages, 6 figures To appear in the Proceedings of the Second Oak Ridge Symposium on Atomic & Nuclear ...
Cowan, John J +3 more
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Differential stellar population models: how to reliably measure [Fe/H] and [alpha/Fe] in galaxies [PDF]
, 2009 We present differential stellar population models, which allow improved determinations of the ages, iron and alpha-element abundances of old stellar populations from spectral fitting.
A. Gallazzi +39 more
core +1 more source
Assessing stellar yields in Galaxy chemical evolution: Observational stellar abundance patterns
Monthly Notices of the Royal Astronomical Society, 2023 ABSTRACTOne-zone Galactic chemical evolution (GCE) models have provided useful insights on a great wealth of average abundance patterns in many environments, especially for the Milky Way and its satellites. However, the scatter of such abundance patterns is still a challenging aspect to reproduce.
Jinning Liang, Eda Gjergo, XiLong Fan
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Stellar Iron Abundances at the Galactic Center [PDF]
, 2000 We present measurements of [Fe/H] for six M supergiant stars and three giant stars within 0.5 pc of the Galactic Center (GC) and one M supergiant star within 30 pc of the GC. The results are based on high-resolution (lambda / Delta lambda =40,000) K-band
Adam Steed +26 more
core +2 more sources
Forming super-Mercuries: Role of stellar abundances
Astronomy & Astrophysics, 2023 Rocky exoplanets with bulk iron mass fraction of more than 60%, known as super-Mercuries, appear to be preferentially hosted by stars with higher iron mass fraction than that of the Sun. It is unclear whether these iron-rich planets can form in the disc or whether giant impacts are necessary for their formation.
Jingyi Mah, Bertram Bitsch
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