Results 71 to 80 of about 3,144 (170)

The Blue Supergiant Problem and the Main-Sequence Width

Galaxies
Using Gaia DR3 we derive new distances and luminosities for a sample of Galactic B supergiants which were thought to be post main-sequence (MS) objects from their HR diagram location beyond the terminal-age MS (TAMS).
Jorick S. Vink, Rene D. Oudmaijer
doaj   +1 more source

Identifying M supergiants with Gaia

, 2005
As a group of stars having high luminosity and thus being able to be detected to great distances, massive M supergiants are extremely helpful to the study of the kinematics of the Milky Way.
Lundqvist, Martin, Wahlgren, Glenn, Kucinskas, Arunas   +2 more
core  

Characterisation of red supergiants in the Gaia spectral range [PDF]

, 2016
Context. The infrared calcium triplet and its nearby spectral region have been used for spectral and luminosity classification of late-type stars, but the samples of cool supergiants (CSGs) used have been very limited (in size, metallicity range, and ...
Dorda Laforet, Ricardo, Ignacio Negueruela, Carlos González-Fernández, González-Fernández, Carlos, Ricardo Dorda, Negueruela, Ignacio   +5 more
core   +2 more sources

COLOUR EXCESSES OF 74 SUPERGIANTS AND 30 CLASSICAL CEPHEIDS

Odessa Astronomical Publications, 2007
We derive accurate, homogeneous atmospheric parameters (Teff , log g, Vt, [Fe/H]) for 74 FGK non-variable supergiants and for 30 classical cepheids in 302 pulsation phases based on the highresolution, high signal-to-noise echelle spectra.
V. V. Kovtyukh, C. Soubiran, S. I. Belik, M. P. Yasinskaya, F. A. Chehonadskih, V. Malyuto   +5 more
doaj   +1 more source

Molecules and Chemistry in Red Supergiants

Galaxies
The envelopes of Red Supergiants (RSGs) have a unique chemical environment not seen in other types of stars. They foster an oxygen-rich synthesis but are tempered by sporadic and chaotic mass loss, which distorts the envelope and creates complex outflow ...
Lucy M. Ziurys, Anita M. S. Richards
doaj   +1 more source

Extending the cosmic distance ladder two orders of magnitude with strongly lensed Cepheids, carbon AGB stars, and RGB stars

Astronomy & Astrophysics
Gravitational lensing by galaxy clusters can create extreme magnification (μ > 1000) near the cluster caustics, thereby enabling detections of individual luminous stars in high-redshift background galaxies.
Diego J. M., Willner S. P., Palencia J. M., Windhorst R. A.   +3 more
doaj   +1 more source

A comprehensive catalogue of high-mass X-ray binaries in the Large Magellanic Cloud detected during the first eROSITA all-sky survey

Astronomy & Astrophysics
Context. The Magellanic Clouds, the closest star-forming galaxies to the Milky Way, offer an excellent environment to study high-mass X-ray binaries (HMXBs).
Kaltenbrunner D., Maitra C., Haberl F., Bodensteiner J., Bogensberger D., Buckley D. A. H., Cioni M. R. L., Greiner J., Monageng I., Udalski A., Vasilopoulos G., Willer R.   +11 more
doaj   +1 more source

The winds of OBA hypergiants and luminous blue variables

Astronomy & Astrophysics
Context. OBA hypergiants are evolved massive stars with notable wind features in their optical spectrum. Located at the cool end of the line-driven wind regime, many of these objects are candidate luminous blue variables (LBVs) and presumably close to ...
Bernini-Peron M., Sander A. A. C., Sabhahit G. N., Najarro F., Ramachandran V., Vink J. S.   +5 more
doaj   +1 more source

THE NATURE OF THE TYPE C SEMI-REGULAR VARIABLES

Odessa Astronomical Publications, 2017
The type C semi-regular (SRC) variables are M-type supergiants like Betelgeuse that undergo regular periodic brightness fluctuations superposed upon seemingly irregular trends.
D. G. Turner
doaj   +1 more source

B supergiants in open clusters and associations [PDF]

, 1990
The final report on project NAG5-78, 'IUE Observations of B Supergiants in the Large Magellanic Cloud', a collaborative effort between Garmany (U. of Colorado), Sonneborn (Goddard Space Flight Center) and Fitzpatrick (Princeton Univ.) is presented.
Garmany, C. D.
core