Results 111 to 120 of about 563,854 (280)

Binarity at LOw Metallicity (BLOeM)

Astronomy & Astrophysics
The Binarity at LOw Metallicity (BLOeM) survey is an ESO large programme designed to obtain multi-epoch spectroscopy for 929 massive stars in the Small Magellanic Cloud (SMC).
Lennon D. J., Berlanas S. R., Herrero A., Britavskiy N., Dufton P. L., Langer N., Jin H., Schootemeijer A., Menon A., Bestenlehner J., Crowther P., Vink J. S., Bodensteiner J., Shenar T., Deshmukh K., Villaseñor J. I., Patrick L., Najarro F., de Koter A., Mahy L., Bowman D. M., Bobrick A., Evans C. J., Gull M., Holgado G., Katabi Z., Kubát J., Marchant P., Pauli D., Pawlak M., Renzo M., Rocha D. F., Sander A. A. C., Sayada T., Simón-Díaz S., Stoop M., Valli R., Wang C., Xu X.-T.   +38 more
doaj   +1 more source

Intrinsic dispersion in early-type stars [PDF]

Symposium - International Astronomical Union, 1959
The principal basic parameters of early-type stars being mass and age, two-dimensional classification according to the MK system corresponds to a mass-age classification.
openaire   +1 more source

Conserved structural motifs in PAS, LOV, and CRY proteins regulate circadian rhythms and are therapeutic targets

FEBS Letters, EarlyView.
Cryptochrome and PAS/LOV proteins play intricate roles in circadian clocks where they act as both sensors and mediators of protein–protein interactions. Their ubiquitous presence in signaling networks has positioned them as targets for small‐molecule therapeutics. This review provides a structural introduction to these protein families.
Eric D. Brinckman, Anna E. Lester, Brian D. Zoltowski   +2 more
wiley   +1 more source

Spectroscopic and Photometric Analysis of the HW Vir Star PTF1 J011339.09+225739.1

Open Astronomy, 2018
HW Vir systems are rare eclipsing binary systems including a subdwarf B star (sdB) with a faint companion, mostly M-dwarfs. Up to now, 19 HW Vir systems have been published, three of them with substellar companions. We report the spectroscopic as well as
Wolz Maximilian, Kupfer Thomas, Drechsel Horst, Heber Ulrich, Irrgang Andreas, Hermes J.J., Bloemen Steven, Levitan David, Dhillon Vik, Marsh TomR.   +9 more
doaj   +1 more source

Spectrophotometry of early type stars

, 1969
A photoelectric spectrum scanner attached to the 16-inch telescope of the Cerro Tololo Inter-American Observatory was used to determine the relative spectral intensity distribution for early type stars. Observations on a minimun of three nights per star have been obtained for about two hundred stars. The tracings extend from 3100 Å to 6000 Å. They were
Gutiérrez-Moreno, A., Moreno, H., Stock, J   +2 more
openaire   +1 more source

The Theory of Winds in Early Type Stars [PDF]

International Astronomical Union Colloquium, 1981
I assume that the purpose of this review of the theory of winds from early type stars is to summarize the way in which the mass loss rate of a star may be included in a calculation of stellar evolution. Let me summarize my conclusions. It is not possible. One can only use estimates of mass loss rates obtained from the observations.
openaire   +1 more source

An upstream open reading frame regulates expression of the mitochondrial protein Slm35 and mitophagy flux

FEBS Letters, EarlyView.
This study reveals how the mitochondrial protein Slm35 is regulated in Saccharomyces cerevisiae. The authors identify stress‐responsive DNA elements and two upstream open reading frames (uORFs) in the 5′ untranslated region of SLM35. One uORF restricts translation, and its mutation increases Slm35 protein levels and mitophagy.
Hernán Romo‐Casanueva, Ariann E. Mendoza‐Martínez, P. Abril Medina‐Flores, Carlos Campero‐Basaldua, Alexander DeLuna, Soledad Funes   +5 more
wiley   +1 more source

A Spectroscopic Survey of Metal-poor OB Stars in Local Dwarf Galaxy NGC 3109

The Astrophysical Journal
As JWST uncovers increasingly strong evidence that metal-poor, massive stars in early galaxies dominated reionization, observational constraints on the properties of such stars are more relevant than ever before.
Abby Mintz, O. Grace Telford, Evan N. Kirby, John Chisholm, Kristen B. W. McQuinn, Danielle A. Berg   +5 more
doaj   +1 more source

Pulsation in Hot Main-Sequence Stars: Comparison of Observations with Models

Universe
The locations of hot pulsating variables in the H–R diagram are found using the effective temperatures derived from spectroscopic analysis and luminosities from Gaia parallaxes.
Luis A. Balona
doaj   +1 more source

Observations of Stellar Winds in Early Type Stars [PDF]

International Astronomical Union Colloquium, 1981
I have been asked to review the “observations” of winds in “early-type” stars. This normally means stars of spectral type OB and those of the Wolf-Rayet (WR) class. In this paper I will concentrate on the massive population I stars of these types, and primarily the O and WR classes on which most of the recent work has been done.
openaire   +1 more source