Results 21 to 30 of about 152,062 (293)
The Astronomical Journal, 2023 High-precision stellar masses and radii measured directly from binaries can effectively calibrate stellar models. However, such a database containing full spectral types and a large range of metallicity is still not fully established. A continuous effort
Jianping Xiong +8 more
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Stellar Populations and Hubble Type [PDF]
Highlights of Astronomy, 1983 Men are more apt to be mistaken in their generalization than in their particular observations. MachiavelliIt was already realized by Hubble (1936) that galaxy morphology and stellar content were correlated. He pointed out that resolution into stars increases along the classification sequence Sa-Sb-Sc.
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Mixed Types of Stellar Populations [PDF]
Nature, 1948 ONE of the most interesting and most mysterious features of the stellar contents of our own and other known galaxies is the fact that there seem to exist two rather distinct types of stellar populations differing between themselves by mechanical as well as by physical properties of individual members.
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The Astronomical Journal, 2022 The Sloan Digital Sky Survey (SDSS) has recently initiated its fifth survey generation (SDSS-V), with a central focus on stellar spectroscopy. In particular, SDSS-V's Milky Way Mapper program will deliver multiepoch optical and near-infrared spectra for ...
Ilya Straumit +15 more
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New X-ray Selected Pre-Main Sequence Members of the Serpens Molecular Cloud [PDF]
, 2013 The study of young stars no longer surrounded by disks can greatly add to our understanding of how protoplanetary disks evolve and planets form. We have used VLT/FLAMES optical spectroscopy to confirm the youth and membership of 19 new young diskless ...
Brown, Joanna M. +2 more
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Stellar Populations in Field Early-Type Galaxies
Astronomical Society of the Pacific Conference Series, 2007 We have acquired intermediate resolution spectra in the 3700-7000 A wavelength range for a sample of 65 early-type galaxies predominantly located in low density environments, a large fraction of which show emission lines. The spectral coverage and the high quality of the spectra allowed us to derive Lick line-strength indices and to study their ...
Annibali, F. +4 more
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A Transparent Window into Early-type Stellar Variability
The Astrophysical Journal, 2022 Abstract Subsurface convection zones are ubiquitous in early-type stars. Driven by narrow opacity peaks, these thin convective regions transport little heat but play an important role in setting the magnetic properties and surface variability of stars.
Adam S. Jermyn +2 more
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Revealing dark matter dress of primordial black holes by cosmological lensing
Physics Letters B, 2023 Stellar-mass primordial black holes (PBHs) from the early Universe can directly contribute to the gravitational wave (GW) events observed by LIGO, but can only comprise a subdominant component of the dark matter (DM).
Masamune Oguri +2 more
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Stellar populations of ultraluminous infrared galaxies
, 2011 Ultraluminous infrared galaxies (ULIRGs) have several types according to dominance of starburst or AGN component. We made stellar population analysis for a sample of 160 ULIRGs to study the evolution of ULIRGs. We found that the dominance of intermediate-
Abazajian +37 more
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The Galaxy Population of Abell 1367: The Stellar Mass-Metallicity Relation
, 2011 Using wide baseline broad-band photometry, we analyse the stellar population properties of a sample of 72 galaxies, spanning a wide range of stellar masses and morphological types, in the nearby spiral-rich and dynamically young galaxy cluster Abell 1367.
Balogh +84 more
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