Results 21 to 30 of about 528,312 (296)
AIP Conference Proceedings, 1996 Recent spectroscopic results from the far ultraviolet and X-ray region coupled with infrared observations demonstrate that winds from luminous stars can be warm (300000K) and fast (speeds of several hundred km s—1) linking the hot solar wind to the cool, massive winds of luminous M-type supergiant stars.
openaire +1 more source
CHEMICAL COMPOSITION OF COOL GIANT STARS
Odessa Astronomical Publications, 2017 Based upon the catalogue of equivalent widths of absorption lines in spectra of cool giant - stars created at the Astrospectroscopy Department of the Astronomical Observatory in Odessa the abundances in their atmospheres is determined. This determination
N. S. Komarov +3 more
doaj +1 more source
Nonthermal Motions and Atmospheric Heating of Cool Stars
The Astrophysical Journal, 2023 The magnetic processes associated with the nonthermal broadening of optically thin emission lines appear to carry enough energy to heat the corona and accelerate the solar wind.
S. Boro Saikia +8 more
doaj +1 more source
Observations of Cooling Neutron Stars [PDF]
, 2006 Observations of cooling neutron stars allow to measure photospheric radii and to constrain the equation of state of nuclear matter at high densities. In this paper we concentrate on neutron stars, which show thermal (photospheric) X-ray emission and have measured distances. After a short summary of the radio pulsars falling into this category we review
openaire +3 more sources
Hot Stars with Cool Companions [PDF]
, 2014 We present intermediate results of a spectroscopic survey for late K-M companions orbiting nearby A and B type stars. Such companions may have formed in the massive disk of the young primary star, and so may be scaled-up versions of brown dwarfs formed ...
Gullikson, Kevin (5274238) +5 more
core +1 more source
FUNDAMENTAL CHARACTERISTICS OF COOL GIANT STARS
Odessa Astronomical Publications, 2017 The methods are suggested for determination of fundamental characteristics of cool giant stars from photometry in the Geneva and Gildenkern systems, using for calibration of a great number of standard stars.
L. V. Korotina, N. S. Komarov
doaj +1 more source
THE MINIMAL COOLING OF NEUTRON STARS [PDF]
Compact Stars, 2004 Talk presented at the workshop "Compact Stars: Quest For New States of Dense Matter", Seoul, South Korea, November 10 - 14, 2003. 15 pages, 7 figures.
openaire +2 more sources
Magnetic activity and hot Jupiters of young Suns : the weak-line T Tauri stars V819 Tau and V830 Tau [PDF]
, 2015 SGG acknowledges support from the Science & Technology Facilities Council (STFC) via an Ernest Rutherford Fellowship [ST/J003255/1]. SHPA acknowledges financial support from CNPq, CAPES and Fapemig.
Delfosse, X. +32 more
core +1 more source
Symposium - International Astronomical Union, 2004 We present preliminary results of grating observations of YY Mensae and V824 Arae by Chandra and XMM-Newton. Spectral features are presented in the context of the emission measure distributions, the coronal abundances, and plasma electron densities.
Audard, M. +8 more
openaire +2 more sources
Benchmark ultra-cool dwarfs in widely separated binary systems
EPJ Web of Conferences, 2011 Ultra-cool dwarfs as wide companions to subgiants, giants, white dwarfs and main sequence stars can be very good benchmark objects, for which we can infer physical properties with minimal reference to theoretical models, through association with the ...
Jones H.R.A. +4 more
doaj +1 more source