Results 41 to 50 of about 56,706 (218)
Unveiling the Structure and Dynamics of Red Giants With Asteroseismology
Frontiers in Astronomy and Space Sciences, 2020 The Kepler mission observed many thousands of red giants. The long time series, some as long as the mission itself, have allowed us to study red giants with unprecedented detail. Given that red giants are intrinsically luminous, and hence can be observed
Sarbani Basu +2 more
doaj +1 more source
The SAGA so far: reading the history of the Galaxy with asteroseismology
EPJ Web of Conferences, 2015 Asteroseismology has the capability of delivering stellar properties which would otherwise be inaccessible, such as radii, masses and thus ages of stars.
Casagrande Luca +5 more
doaj +1 more source
Galactic Archaeology using the stellar vertical structure of galactic discs [PDF]
, 2022 The vertical distribution of stars within galactic discs is intrinsically connected to the evolution of the host galaxy: from the creation of galactic components such as the thin and thick disc to many disc features, like flaring, age gradients, or warps.
openaire +1 more source
The Astrophysical Journal, 2023 We identify 71 distant stars in James Webb Space Telescope/NIRCam early release observations (ERO) images of the field of galaxy cluster SMACS J0723.3-7327 (SMACS 0723).
Jake Summers +25 more
doaj +1 more source
Chemo-dynamical Simulations and Galactic Archaeology [PDF]
AIP Conference Proceedings, 2010 We predict the frequency distribution of elemental abundance ratios from Carbon to Zinc as a functions of time location, which can be directly compared with the next generation of the galactic archeology project such as the HERMES. We perform the chemodynamical simulations of a Milky Way‐type galaxy from a CDM initial condition, using a self‐consistent
Chiaki Kobayashi +7 more
openaire +2 more sources
Scaling K2. VI. Reduced Small-planet Occurrence in High-galactic-amplitude Stars
The Astronomical Journal, 2023 In this study, we performed a homogeneous analysis of the planets around FGK dwarf stars observed by the Kepler and K2 missions, providing spectroscopic parameters for 310 K2 targets —including 239 Scaling K2 hosts—observed with Keck/HIRES.
Jon K. Zink +15 more
doaj +1 more source
A Tale of Two Disks: Mapping the Milky Way with the Final Data Release of APOGEE
The Astrophysical Journal, 2023 We present new maps of the Milky Way disk showing the distribution of metallicity ([Fe/H]), α -element abundances ([Mg/Fe]), and stellar age, using a sample of 66,496 red giant stars from the final data release (DR17) of the Apache Point Observatory ...
Julie Imig +26 more
doaj +1 more source
NLTE Analysis of Y i and Y ii in the Atmospheres of FGK Stars
The Astrophysical Journal, 2023 The nonlocal thermodynamical equilibrium (NLTE) line formation of Y i and Y ii is considered in 1D LTE model atmospheres of FGK-type stars. The model atom was constructed with the most up-to-date atomic data, including quantum cross sections and rate ...
Sofya Alexeeva +7 more
doaj +1 more source
All-sky Kinematics and Chemistry of Monoceros Stellar Overdensity
The Astrophysical Journal, 2023 We explore the kinematic and chemical properties of the Monoceros stellar overdensity by combining data from the Two Micron All Sky Survey, Wide-field Infrared Survey Explorer, APOGEE, and Gaia.
Lais Borbolato +9 more
doaj +1 more source
STRÖMGREN SURVEY FOR ASTEROSEISMOLOGY AND GALACTIC ARCHAEOLOGY: LET THE SAGA BEGIN [PDF]
The Astrophysical Journal, 2014 Asteroseismology has the capability of precisely determining stellar properties which would otherwise be inaccessible, such as radii, masses and thus ages of stars. When coupling this information with classical determinations of stellar parameters, such as metallicities, effective temperatures and angular diameters, powerful new diagnostics for ...
Antonino Milone +21 more
openaire +6 more sources