Results 31 to 40 of about 74,495 (201)

The masses, and the mass discrepancy of O-type stars [PDF]

, 2010
Context. The "mass discrepancy" in massive O stars represents a long-standing problem in stellar astrophysics with far-reaching implications for the chemical and dynamical feedback in galaxies. Aims.
Vink, Jorick, Weidner, Carsten
core   +1 more source

Stellar flares observed in long cadence data from the Kepler mission

, 2017
We aim to perform a statistical study of stellar flares observed by Kepler. We want to study the flare amplitude, duration, energy and occurrence rates, and how they are related to the spectral type and rotation period.
Debosscher, Jonas, Shariati, Hoda, Van Doorsselaere, Tom   +2 more
core   +1 more source

Spectral Synthesis Of Carmenes M-Type Stars: Stellar Atmospheric Parameters

, 2018
{"references": ["Alvarez & Plez 1998, A&A, 330, 1109", "Blanco-Cuaresma et al. 2014, A&A, 569, A111", "Husser et al. 2013, A&A, 553, A6", "Passegger et al. 2018, A&A, 615, A6", "Quirrenbach et al. 2016, in Proc. SPIE, 9908, 990812", "Ryabchikova et al. 2015, PhysScr, 90, 5", "Tabernero et al. 2018, MNRAS, 476, 3106"]}
Marfil, Emilio, Montes, David, Tabernero, Hugo M., Lázaro Barrasa, Francisco J., Caballero, José Antonio, González Hernández, Jonay I.   +5 more
openaire   +1 more source

THE GEMINI SPECTRAL LIBRARY OF NEAR-IR LATE-TYPE STELLAR TEMPLATES AND ITS APPLICATION FOR VELOCITY DISPERSION MEASUREMENTS [PDF]

The Astrophysical Journal Supplement Series, 2009
To appear in the ApJ Supplement Series, December 2009. AASTex, 25 pages, 17 figures. The library spectra are available in standard FITS format from the Gemini Observatory webpage at http://www.gemini.edu/sciops/instruments/nearir-resources/?q=node ...
Winge, Claudia, Riffel, Rogemar A., Storchi-Bergmann, Thaisa   +2 more
openaire   +2 more sources

The Search for Stellar Companions to Exoplanet Host Stars Using the CHARA Array

, 2008
Most exoplanets have been discovered via radial velocity studies, which are inherently insensitive to orbital inclination. Interferometric observations will show evidence of a stellar companion if it sufficiently bright, regardless of the inclination ...
Ellyn K. Baines, Habets G. M. H. J., Harold A. McAlister, Imbert M., Judit Sturmann, Laszlo Sturmann, Mitchell D. S., Nils H. Turner, Perryman M. A. C., Stephen T. Ridgway, Theo A. ten Brummelaar   +10 more
core   +1 more source

Relation Between Stellar Mass and Star Formation Activity in Galaxies [PDF]

, 2008
For a mass-selected sample of 66544 galaxies with photometric redshifts from the Cosmic Evolution Survey (COSMOS), we examine the evolution of star formation activity as a function of stellar mass in galaxies. We estimate the cosmic star formation rates (
Abraham, Afonso, Andrew Hopkins, Bahram Mobasher, Baldry, Bolzonella, Calzetti, Calzetti, Capak, Capak, Caputi, Cram, Daddi, Dahlen, David B. Sanders, Dickinson, Ellison ., Eva Schinnerer, Flores, Giavalisco, Glazebrook, Gómez, Hopkins, Hopkins, Hopkins, Hopkins, Juneau, Kartik Sheth, Le Floc'h, Li, Mara Salvato, Mobasher, Nick Z. Scoville, Olivier Ilbert, Papovich, Peter Capak, R. Michael Rich, Salvato, Scarlata, Scoville, Scoville, Strolger, Sullivan, Taniguchi, Tomas Dahlen, Zheng   +45 more
core   +3 more sources

Correlating Intrinsic Stellar Parameters with Mg ii Self-reversal Depths

The Astrophysical Journal
The Mg ii h&k emission lines (2803, 2796 Å) are a useful tool for understanding stellar chromospheres and transition regions due to their intrinsic brightness, relatively low interstellar medium (ISM) absorption interference, and abundance
Anna Taylor, Audrey Dunn, Sarah Peacock, Allison Youngblood, Seth Redfield   +4 more
doaj   +1 more source

Dust masses of disks around 8 Brown Dwarfs and Very Low-Mass Stars in Upper Sco OB1 and Ophiuchus

, 2016
We present the results of ALMA band 7 observations of dust and CO gas in the disks around 7 objects with spectral types ranging between M5.5 and M7.5 in Upper Scorpius OB1, and one M3 star in Ophiuchus.
Bulger, J., Casassus, S., Hales, A., Harvey, P. M, Menard, F., Patience, J., Pinte, C., van der Plas, G., Ward-Duong, K.   +8 more
core   +3 more sources

Spectroscopy and spectral types for 387 stellar objects from the large, bright QSO survey

The Astrophysical Journal Supplement Series, 1992
Spectroscopy and spectral types for 387 stellar objects brighter than B J = 18.75 found in the Large, Bright QSO Survey (LBQS) are reported. The spectra were observed with the MMT at moderate resolution (6 A FWHM) and low S/N, and cover the interval λλ3200-7400.
Christopher Berg, Gary Wegner, Craig B. Foltz, Frederic H., Jr. Chaffee, Paul C. Hewett   +4 more
openaire   +1 more source

SPIDER. V. MEASURING SYSTEMATIC EFFECTS IN EARLY-TYPE GALAXY STELLAR MASSES FROM PHOTOMETRIC SPECTRAL ENERGY DISTRIBUTION FITTING [PDF]

The Astronomical Journal, 2011
We present robust statistical estimates of the accuracy of early-type galaxy stellar masses derived from spectral energy distribution (SED) fitting as functions of various empirical and theoretical assumptions. Using large samples consisting of {approx}40,000 galaxies from the Sloan Digital Sky Survey (SDSS; ugriz), of which {approx}5000 are also in ...
R. Swindle, R. R. Gal, F. La Barbera, R. R. de Carvalho   +3 more
openaire   +1 more source