Gravitational Waves, relativistic celestial mechanics and black hole physics
Metallicity calibration of metal-poor sub-dwarf M stars based on binary companions
Investigation of high energy and plasma astrophysics phenomena: theory, numerical ...
| Full text | |
| Author(s): Show less - |
Klement, Robert
[1]
;
Schaefer, Gail H.
[1]
;
Gies, Douglas R.
[2]
;
Wang, Luqian
[2, 3]
;
Baade, Dietrich
[4]
;
Rivinius, Thomas
[5]
;
Gallenne, Alexandre
[6, 7]
;
Carciofi, Alex C.
[8]
;
Monnier, John D.
[9]
;
Merand, Antoine
[4]
;
Anugu, Narsireddy
[1, 10]
;
Kraus, Stefan
[11]
;
Davies, Claire L.
[11]
;
Lanthermann, Cyprien
[1]
;
Gardner, Tyler
[9]
;
Wysocki, Peter
[2]
;
Ennis, Jacob
[9]
;
Labdon, Aaron
[5, 11]
;
Setterholm, Benjamin R.
[9]
;
Le Bouquin, Jean-Baptiste
[12]
Total Authors: 20
|
| Affiliation: Show less - | [1] Georgia State Univ, Mt Wilson Observ, CHARA Array, Mt Wilson, CA 91023 - USA
[2] Georgia State Univ, Ctr High Angular Resolut Astron, Dept Phys & Astron, POB 5060, Atlanta, GA 30302 - USA
[3] Chinese Acad Sci, Yunnan Observ, POB 110, Kunming 650011, Yunnan - Peoples R China
[4] European Org Astron Res Southern Hemisphere ESO, Karl Schwarzschild Str 2, D-85748 Garching - Germany
[5] European Org Astron Res Southern Hemisphere ESO, Casilla 19001, Santiago 19 - Chile
[6] Univ Concepcion, Dept Astron, Casilla 160-C, Concepcion - Chile
[7] Univ Chile, Dept Astron, Unidad Mixta Int Franco Chilena Astron, CNRS, UMI 3386, Camino Observ 1515, Santiago - Chile
[8] Univ Sao Paulo, Inst Astron Geofis & Ciencias Atmosfer, Rua Matao 1226, Sao Paulo, SP - Brazil
[9] Univ Michigan, Dept Astron, 1085 S Univ Ave, Ann Arbor, MI 48109 - USA
[10] Univ Arizona, Dept Astron, Steward Observ, 933 N Cherry Ave, Tucson, AZ 85721 - USA
[11] Univ Exeter, Sch Phys & Astron, Astrophys Grp, Stocker Rd, Exeter EX4 4QL, Devon - England
[12] Univ Grenoble Alpes, CNRS, IPAG, F-38000 Grenoble - France
Total Affiliations: 12
|
| Document type: | Journal article |
| Source: | ASTROPHYSICAL JOURNAL; v. 926, n. 2 FEB 1 2022. |
| Web of Science Citations: | 0 |
| Abstract | |
Classical Be stars are possible products of close binary evolution, in which the mass donor becomes a hot, stripped O- or B-type subdwarf (sdO/sdB), and the mass gainer spins up and grows a disk to become a Be star. While several Be+sdO binaries have been identified, dynamical masses and other fundamental parameters are available only for a single Be+sdO system, limiting the confrontation with binary evolution models. In this work, we present direct interferometric detections of the sdO companions of three Be stars-28 Cyg, V2119 Cyg, and 60 Cyg-all of which were previously found in UV spectra. For two of the three Be+sdO systems, we present first orbits and preliminary dynamical masses of the components, revealing that one of them could be the first identified progenitor of a Be/X-ray binary with a neutron star companion. These results provide new sets of fundamental parameters that are crucially needed to establish the evolutionary status and origin of Be stars. (AU) | |
| FAPESP's process: | 19/13354-1 - Decretion disks and outflows around fast-spinning stars |
| Grantee: | Alex Cavaliéri Carciofi |
| Support Opportunities: | Regular Research Grants |
| FAPESP's process: | 18/04055-8 - High precision spectroscopy: from the first stars to planets |
| Grantee: | Jorge Luis Melendez Moreno |
| Support Opportunities: | Research Projects - Thematic Grants |