The donor of Aquila X-1 revealed by high-angular resolution near-infrared spectroscopy

Bibcode
2017MNRAS.464L..41M
DOI
10.1093/mnrasl/slw172
Mata Sánchez, D.; Muñoz-Darias, T.; Casares, J.; Jiménez-Ibarra, F.
Referencia bibliográfica

Monthly Notices of the Royal Astronomical Society: Letters, Volume 464, Issue 1, p.L41-L45

Fecha de publicación:
1
2017
Número de autores
4
Número de autores del IAC
4
Número de citas
32
Número de citas referidas
29
Descripción
The low-mass X-ray binary Aquila X-1 is one of the most active neutron star X-ray transients. Despite its relatively bright quiescent optical counterpart, the detection of its companion has been hampered by the presence of a nearby interloper star. Using the Spectrograph for INtegral Field Observations in the Near Infrared (SINFONI) on the Very Large Telescope-8.2m telescope, we unambiguously single out Aquila X-1 from the interloper. Phase-resolved near-infrared spectroscopy reveals absorption features from a K4 ± 2 companion star moving at a projected velocity of K2 = 136 ± 4 km s- 1. We here present the first dynamical solution and associated fundamental parameters of Aquila X-1, imposing new constraints on the orbital inclination (36° < i < 47°) and the distance (d = 6 ± 2 kpc) to this prototypical neutron star transient.
Proyectos relacionados
Agujero negro en erupción
Agujeros negros, estrellas de neutrones, enanas blancas y su entorno local
Los agujeros negros y estrellas de neutrones en binarias de rayos-X son laboratorios únicos para explorar la física de estos objetos compactos. No solo permiten confirmar la existencia de agujeros negros de origen estelar a través de mediciones dinámicas de sus masas, sino que también permiten investigar el comportamiento de la materia y la
Montserrat
Armas Padilla
En ejecución
Tipo
Con árbitro
Acreción
Física estelar e interestelar (FEEI)

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