Results 81 to 90 of about 3,144 (170)

VLT/SPHERE images of the candidate companion of Betelgeuse

Astronomy & Astrophysics
Context. Although the binary fraction of massive main-sequence stars is well established, this is much less so the case for red supergiant (RSG) stars due to the primary’s brightness as well as its complex and strong surface activity. Aims. Betelgeuse is
Montargès M., Boccaletti A., Flasseur O., de Koter A., Milli J., Kervella P., Ridgway S., Bordier E., Lagadec E., Dupree A. K., Backs F., Calderwood T., Morgan P.   +12 more
doaj   +1 more source

Betelgeuse and the Red Supergiants

, 2013
Betelgeuse is one of the most magnificent stars in the sky, and one of the nearest red supergiants. Astronomers gathered in Paris in the Autumn of 2012 to decide what we know about its structure, behaviour, and past and future evolution, and how to place
J. Th. van Loon
core   +1 more source

The first statistical study of over 100 magnified stellar events at a redshift z ≈ 0.725 with JWST

Astronomy & Astrophysics
Highly magnified stars at cosmological distances (z ≳ 0.7) become detectable thanks to microlensing by intracluster stars near the critical curves of galaxy clusters.
Palencia José María, Sun Fengwu, Diego José María, Fudamoto Yoshinobu, Koekemoer Anton M., Willmer Christopher N. A., Iani Eduardo, Lin Xiaojing, Pierel Justin D. R., Amruth Alfred, Bauer Franz E., Broadhurst Tom, Chen Wenlei, Dai Liang, Espada Daniel, Filippenko Alexei V., Fujimoto Seiji, Kelly Patrick L., Li Mingyu, Li Sung Kei, Meena Ashish Kumar, Miralda-Escudé Jordi, Morilla Paloma, Struble Mitchell F., Williams Hayley, Windhorst Rogier A., Zackrison Erick, Zhou Ruwen, Zitrin Adi   +28 more
doaj   +1 more source

Characterisation of the variability of the blue supergiant HD 14134

Astronomy & Astrophysics
Context. The post-main-sequence evolution of massive stars encompasses phases in which the stars display high variability. One such class of objects are the blue supergiants.
Guha Suryani, Kraus Michaela, Sánchez Arias Julieta P., Németh Péter, Kamiński Krzysztof   +4 more
doaj   +1 more source

Frequency dependent diameters and atmospheric structure of late-type supergiants

, 1977
A method is suggested for using the measured frequency dependent diameters to test the atmospheric structure of late-type supergiants.
Vardya , M. S.
core   +1 more source

Evaluating Gaia Astrometric Quality and Distances for Galactic Hot Supergiants

Universe
Distances to Galactic BA supergiants are essential for determining their luminosities, radii, and positions on the Hertzsprung–Russell diagram, yet Gaia parallaxes for these bright, extended sources are often affected by systematics.
Nadezhda L. Vaidman, Shakhida T. Nurmakhametova, Aziza B. Umirova, Serik A. Khokhlov, Aldiyar T. Agishev, Berik S. Yermekbayev   +5 more
doaj   +1 more source

History of two mass loss processes in VY CMa. [PDF]

Proc Int Astron Union, 2023
Quintana-Lacaci G, Velilla L, Fonfría JP, Cernicharo J, Castro-Carrizo A, Agúndez M, Decin L.   +6 more
europepmc   +1 more source

Red and Yellow Hypergiants

Galaxies
The red and yellow hypergiants are a rare and important phase in the evolution of the most massive stars that can reach the cool part of the HR Diagram.
Terry Jones
doaj   +1 more source

Evidence for Evolved Stellar Binary Mergers in Observed B-type Blue Supergiants

The Astrophysical Journal Letters
Blue supergiants are the brightest stars in their host galaxies, and yet their evolutionary status has been a long-standing problem in stellar astrophysics.
Athira Menon, Andrea Ercolino, Miguel A. Urbaneja, Daniel J. Lennon, Artemio Herrero, Ryosuke Hirai, Norbert Langer, Abel Schootemeijer, Emmanouil Chatzopoulos, Juhan Frank, Sagiv Shiber   +10 more
doaj   +1 more source

Molecules and the 1720 Å feature in hot supergiants

, 1973
A suggestion has been made that the recently observed feature around 1720 Å in early type supergiants may be molecular in ...
Vardya, M. S., Tarafdar, S. P.
core