Non-synchronous rotations in massive binary systems: HD 93343 revisited

<i>Context</i>. Most massive stars are in binary or multiple systems. Several massive stars have been detected as double-lined spectroscopic binaries and among these, the OWN Survey has detected a non-negligible number whose components show very different spectral line broadening (i.e.,...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Putkuri, Cristina Ester, Gamen, Roberto Claudio, Morrell, Nidia Irene, Simón Díaz, S., Barbá, Rodolfo Héctor, Ferrero Sosa, Gabriel Antonio, Arias, Julia Inés, Solivella, Gladys Rebeca
Formato:	Articulo Preprint
Lenguaje:	Inglés
Publicado:	2018
Materias:	Astronomía Física Ciencias Naturales Ciencias Exactas Binaries: spectroscopic Stars: early-type Stars: rotation Stars: individual: HD 93343
Acceso en línea:	http://sedici.unlp.edu.ar/handle/10915/93844 https://www.aanda.org/10.1051/0004-6361/201833574 https://arxiv.org/abs/1810.02154v1
Aporte de:	SEDICI (UNLP) de Universidad Nacional de La Plata

id	I19-R120-10915-93844
record_format	dspace
institution	Universidad Nacional de La Plata
institution_str	I-19
repository_str	R-120
collection	SEDICI (UNLP)
language	Inglés
topic	Astronomía Física Ciencias Naturales Ciencias Exactas Binaries: spectroscopic Stars: early-type Stars: rotation Stars: individual: HD 93343
spellingShingle	Astronomía Física Ciencias Naturales Ciencias Exactas Binaries: spectroscopic Stars: early-type Stars: rotation Stars: individual: HD 93343 Putkuri, Cristina Ester Gamen, Roberto Claudio Morrell, Nidia Irene Simón Díaz, S. Barbá, Rodolfo Héctor Ferrero Sosa, Gabriel Antonio Arias, Julia Inés Solivella, Gladys Rebeca Non-synchronous rotations in massive binary systems: HD 93343 revisited
topic_facet	Astronomía Física Ciencias Naturales Ciencias Exactas Binaries: spectroscopic Stars: early-type Stars: rotation Stars: individual: HD 93343
description	<i>Context</i>. Most massive stars are in binary or multiple systems. Several massive stars have been detected as double-lined spectroscopic binaries and among these, the OWN Survey has detected a non-negligible number whose components show very different spectral line broadening (i.e., projected rotational velocities). This fact raises a discussion about the contributing processes, such as angular-momentum transfer and tidal forces. <i>Aims</i>. We seek to constrain the physical and evolutionary status of one of such systems, the O+O binary HD 93343. Methods. We analyzed a series of high-resolution multiepoch optical spectra to determine the orbital parameters, projected rotational velocities, and evolutionary status of the system. <i>Results</i>. HD 93343 is a binary system comprised of two O7.5 Vz stars that each have minimum masses of approximately 22 M in a wide and eccentric orbit (e = 0.398±0.004; P = 50.432±0.001 d). Both stars have very similar stellar parameters, and hence ages. As expected from the qualitative appearance of the combined spectrum of the system, however, these stars have very different projected rotational velocities (65 and 325 km s-1, respectively). <i>Conclusions</i>. The orbits and stellar parameters obtained for both components seem to indicate that their youth and relative separation is enough to discard the effects of mass transfer and tidal friction. Thus, non-synchronization should be intrinsic to their formation.
format	Articulo Preprint
author	Putkuri, Cristina Ester Gamen, Roberto Claudio Morrell, Nidia Irene Simón Díaz, S. Barbá, Rodolfo Héctor Ferrero Sosa, Gabriel Antonio Arias, Julia Inés Solivella, Gladys Rebeca
author_facet	Putkuri, Cristina Ester Gamen, Roberto Claudio Morrell, Nidia Irene Simón Díaz, S. Barbá, Rodolfo Héctor Ferrero Sosa, Gabriel Antonio Arias, Julia Inés Solivella, Gladys Rebeca
author_sort	Putkuri, Cristina Ester
title	Non-synchronous rotations in massive binary systems: HD 93343 revisited
title_short	Non-synchronous rotations in massive binary systems: HD 93343 revisited
title_full	Non-synchronous rotations in massive binary systems: HD 93343 revisited
title_fullStr	Non-synchronous rotations in massive binary systems: HD 93343 revisited
title_full_unstemmed	Non-synchronous rotations in massive binary systems: HD 93343 revisited
title_sort	non-synchronous rotations in massive binary systems: hd 93343 revisited
publishDate	2018
url	http://sedici.unlp.edu.ar/handle/10915/93844 https://www.aanda.org/10.1051/0004-6361/201833574 https://arxiv.org/abs/1810.02154v1
work_keys_str_mv	AT putkuricristinaester nonsynchronousrotationsinmassivebinarysystemshd93343revisited AT gamenrobertoclaudio nonsynchronousrotationsinmassivebinarysystemshd93343revisited AT morrellnidiairene nonsynchronousrotationsinmassivebinarysystemshd93343revisited AT simondiazs nonsynchronousrotationsinmassivebinarysystemshd93343revisited AT barbarodolfohector nonsynchronousrotationsinmassivebinarysystemshd93343revisited AT ferrerososagabrielantonio nonsynchronousrotationsinmassivebinarysystemshd93343revisited AT ariasjuliaines nonsynchronousrotationsinmassivebinarysystemshd93343revisited AT solivellagladysrebeca nonsynchronousrotationsinmassivebinarysystemshd93343revisited
bdutipo_str	Repositorios
_version_	1764820491829248002

Non-synchronous rotations in massive binary systems: HD 93343 revisited

Ejemplares similares