Possible Evidence for Metal Accretion onto the Surfaces of Metal-Poor Main-Sequence Stars [PDF]
, 2014 The entire evolution of the Milky Way, including its mass-assembly and star-formation history, is imprinted onto the chemo-dynamical distribution function of its member stars, f(x, v, [X/H]), in the multi-dimensional phase space spanned by position, velocity, and elemental abundance ratios.
Beers, Timothy C. +4 more
arxiv +3 more sources
The Unseen Population of F to K-type Companions to Hot Subdwarf Stars [PDF]
, 2012 We present a method to select hot subdwarf stars with A to M-type companions using photometric selection criteria. We cover a wide range in wavelength by combining GALEX ultraviolet data, optical photometry from the SDSS and the Carlsberg Meridian telescope, near-infrared data from 2MASS and UKIDSS.
Abazajian +98 more
arxiv +3 more sources
Sequential star formation in IRAS 06084-0611 (GGD 12-15) - From intermediate-mass to high-mass stars [PDF]
, 2011 Context. The formation and early evolution of high- and intermediate-mass stars towards the main sequence involves the interplay of stars in a clustered and highly complex environment.
K. Maaskant +10 more
semanticscholar +6 more sources
Regular frequency patterns in the young δ Scuti star HD 261711 observed by the CoRoT and MOST satellites [PDF]
, 2013 Context. The internal structure of pre-main-sequence (PMS) stars is poorly constrained at present. This could change significantly through high-quality asteroseismological observations of a sample of such stars. Aims.
K. Zwintz +16 more
semanticscholar +6 more sources
The inner circumstellar disk of the UX Orionis star V1026 Scorpii [PDF]
, 2014 The UX Ori type variables (named after the prototype of their class) are intermediate-mass pre-main sequence objects. One of the most likely causes of their variability is the obscuration of the central star by orbiting dust clouds.
J. Vural +10 more
semanticscholar +4 more sources
The SAMI Galaxy Survey: spatially resolving the main sequence of star formation [PDF]
, 2018 We present the ∼800 star formation rate maps for the Sydney-AAO Multi-object Integral field spectrograph (SAMI) Galaxy Survey based on H α emission maps, corrected for dust attenuation via the Balmer decrement, that are included in the SAMI Public Data ...
A. Medling +44 more
semanticscholar +1 more source
Coherent radio emission from a quiescent red dwarf indicative of star–planet interaction [PDF]
Nature Astronomy, 2020 Low-frequency (ν ≲ 150 MHz) stellar radio emission is expected to originate in the outer corona at heights comparable to and larger than the stellar radius.
H. Vedantham +17 more
semanticscholar +1 more source
Three Saturn-mass planets transiting F-type stars revealed with TESS and HARPS. TOI-615b, TOI-622b, and TOI-2641b [PDF]
Astronomy & Astrophysics, 2023 While the sample of confirmed exoplanets continues to increase, the population of transiting exoplanets around early-type stars is still limited. These planets allow us to investigate the planet properties and formation pathways over a wide range of ...
A. Psaridi +58 more
semanticscholar +1 more source
Regular Radial Velocity Variations in Nine G- and K-type Giant Stars: Eight Planets and One Planet Candidate [PDF]
, 2021 We report the detection of radial velocity variations in nine evolved G- and K-type giant stars. The observations were conducted at Okayama Astrophysical Observatory. Planets or planet candidates can best explain these regular variations. However, a coincidence of near 280-day variability among five of them prevents us from fully ruling out stellar ...
arxiv +1 more source
Transits of Known Planets Orbiting a Naked-eye Star [PDF]
Astronomical Journal, 2020 Some of the most scientifically valuable transiting planets are those that were already known from radial velocity (RV) surveys. This is primarily because their orbits are well characterized and they preferentially orbit bright stars that are the targets
S. Kane +47 more
semanticscholar +1 more source