Results 11 to 20 of about 220,237 (344)

Fundamental stellar properties from asteroseismology [PDF]

Proceedings of the International Astronomical Union, 2013
AbstractAccurate characterization of stellar populations is of prime importance to correctly understand the formation and evolution process of our Galaxy. The field of asteroseismology has been particularly successful in such an endeavor providing fundamental parameters for large samples of stars in different evolutionary phases. We present our results
Silva Aguirre, V., Casagrande, L., Miglio, A.   +2 more
openaire   +3 more sources

CoSHA: Code for Stellar Properties Heuristic Assignment—for the MaStar Stellar Library

The Astrophysical Journal Supplement Series, 2022
Abstract We introduce CoSHA: a Code for Stellar properties Heuristic Assignment. In order to estimate the stellar properties, CoSHA implements a Gradient Tree Boosting algorithm to label each star across the parameter space (T eff, log
Alfredo Mejía-Narváez, Gustavo Bruzual, Sebastian. F. Sánchez, Leticia Carigi, Jorge Barrera-Ballesteros, Mabel Valerdi, Renbin Yan, Niv Drory   +7 more
openaire   +2 more sources

Shape and orientation of stellar velocity ellipsoids in spiral galaxies [PDF]

, 2007
We present a numerical study of the properties of the stellar velocity distribution in stellar discs which have developed a saturated, two-armed spiral structure.
Alcobé, Athanassoula, Bertin, Bienaymé, Binney, Binney, Blitz, Carlberg, Ch. Theis, Cuddeford, De Simone, Dehnen, Dehnen, Dehnen, Dehnen, E. I. Vorobyov, Eddington, ESA, Freeman, Gerssen, Goldreich, Hogg, Jenkins, Julian, Kaufmann, Kerr, Kobold, Kuijken, Kuijken, Lin, Mayor, Mayor, Minchev, Minchev, Minchev, Mühlbauer, Patsis, Polyachenko, Ratnatunga, Schwarzschild, Spitzer, Toomre, Vorobyov, Wielen, Wielen, Yuan   +45 more
core   +1 more source

Stellar Populations of UV-Selected Active Galactic Nuclei Host Galaxies at z ~ 2 - 3 [PDF]

, 2012
We use stellar population synthesis modeling to analyze the host galaxy properties of a sample of 33 UV-selected, narrow-lined active galactic nuclei (AGNs) at z ~ 2 - 3.
Adelberger, Adelberger, Adelberger, Adelberger, Aird, Alexander, Alexander, Alice E. Shapley, Alonso-Herrero, Alonso-Herrero, Alonso-Herrero, Assef, Baldry, Barger, Barth, Bell, Bentz, Bundy, Calzetti, Cardamone, Charles C. Steidel, Coil, Daddi, Dawn K. Erb, Donley, Erb, Erb, Fadda, Fazio, Ferrarese, Gebhardt, Gordon, Grogin, Gültekin, Hainline, Hainline, Hickox, Hickox, Hopkins, Hopkins, Hopkins, Häring, Jenny E. Greene, Kevin N. Hainline, Kocevski, Koekemoer, Kriek, Kriek, Labbé, Lacy, Lacy, Lauer, Law, Maraston, Maíz Apellániz, Merloni, Nandra, Naveen A. Reddy, Noeske, Pannella, Papovich, Park, Persson, Polletta, Reddy, Reddy, Reddy, Reddy, Reddy, Reddy, Richards, Salim, Sawicki, Schawinski, Shapley, Shapley, Shapley, Shapley, Silverman, Silverman, Steidel, Steidel, Steidel, Stern, Tremonti, Vestergaard, Williams, Xue, Zakamska   +88 more
core   +2 more sources

Retrieving cirrus microphysical properties from stellar aureoles [PDF]

Journal of Geophysical Research: Atmospheres, 2013
The aureoles around stars caused by thin cirrus limit nighttime measurement opportunities for ground‐based astronomy, but can provide information on high‐altitude ice crystals for climate research. In this paper we attempt to demonstrate quantitatively how this works.
DeVore, John G., Kristl, Joseph A., Rappaport, Saul   +2 more
openaire   +2 more sources

Binary Population and Spectral Synthesis Version 2.1: construction, observational verification and new results [PDF]

, 2017
The Binary Population and Spectral Synthesis (BPASS) suite of binary stellar evolution models and synthetic stellar populations provides a framework for the physically motivated analysis of both the integrated light from distant stellar populations and ...
., Bray, J. C., Eldridge, J. J., Greis, S. M. L., McClelland, L. A. S., Ng, M., Stanway, E. R., Taylor, G., Xiao, L.   +8 more
core   +2 more sources

Three-dimensional Simulations of Massive Stars. II. Age Dependence

The Astrophysical Journal, 2023
We present 3D full star simulations, reaching up to 90% of the total stellar radius, for three 7 M _⊙ stars of different ages: zero-age main sequence (ZAMS), mid–main sequence (midMS), and terminal-age main sequence (TAMS).
R. Vanon, P. V. F. Edelmann, R. P. Ratnasingam, A. Varghese, T. M. Rogers   +4 more
doaj   +1 more source

KEPLER MISSION STELLAR AND INSTRUMENT NOISE PROPERTIES [PDF]

The Astrophysical Journal Supplement Series, 2011
Kepler Mission results are rapidly contributing to fundamentally new discoveries in both the exoplanet and asteroseismology fields. The data returned from Kepler are unique in terms of the number of stars observed, precision of photometry for time series observations, and the temporal extent of high duty cycle observations.
Gilliland R. L., Chaplin W. J., Dunham E. W., Argabright V. S., Borucki W. J., Basri G., Bryson S. T., Buzasi D. L., Caldwell D. A., Elsworth Y. P., Jenkins J. M., Koch D. G., Kolodziejczak J., Miglio A., Van Cleve J., Walkowicz L. M., Welsh W. F.   +16 more
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Variability of Known Exoplanet Host Stars Observed by TESS

The Astronomical Journal, 2023
Both direct and indirect methods of exoplanet detection rely upon detailed knowledge of the potential host stars. Such stellar characterization allows for accurate extraction of planetary properties, as well as contributing to our overall understanding ...
Emilie R. Simpson, Tara Fetherolf, Stephen R. Kane, Joshua Pepper, Teo Močnik, Paul A. Dalba   +5 more
doaj   +1 more source

The Auriga stellar haloes: connecting stellar population properties with accretion and merging history [PDF]

Monthly Notices of the Royal Astronomical Society, 2019
Accepted to MNRAS.
Antonela Monachesi, Facundo A Gómez, Robert J J Grand, Christine M Simpson, Guinevere Kauffmann, Sebastián Bustamante, Federico Marinacci, Rüdiger Pakmor, Volker Springel, Carlos S Frenk, Simon D M White, Patricia B Tissera   +11 more
openaire   +5 more sources