Non-grey dimming events of KIC 8462852 from GTC spectrophotometry

Bibcode
2018A&A...610L..12D
DOI
10.1051/0004-6361/201732453
Deeg, H. J.; Alonso, R.; Nespral, D.; Boyajian, T. S.
Referencia bibliográfica

Astronomy and Astrophysics, Volume 610, id.L12, 5 pp.

Fecha de publicación:
2
2018
Revista
Astronomy and Astrophysics
Número de autores
4
Número de autores del IAC
3
Número de citas
15
Número de citas referidas
11
Descripción
We report ground-based spectrophotometry of KIC 8462852 obtained during its first dimming events since the end of the Kepler mission. The dimmings show a clear colour signature and are deeper in visual blue than in red wavelengths. The wavelength dependency of the flux loss can be described with an absorption Ångström coefficient of 2.19 ± 0.45, which is compatible with absorption by optically thin dust with particle sizes of the order of 0.0015 to 0.15 μm. These particles would be smaller than is required to be resistant against blow-out by radiation pressure when close to the star. During occultation events, these particles must be replenished from a comoving body on time-scales of days. If dust is indeed the source of the dimming events of KIC 8462852, deeper dimming events should show more neutral colours, as is expected from optically thick absorbers. The individual reduced spectra of the target and reference stars are only available at the CDS via anonymous ftp to http://cdsarc.u-strasbg.fr (http://130.79.128.5) or via http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/610/L12
Proyectos relacionados
Helio and Asteroseismologia
Sismología Solar y Estelar y Búsqueda de Exoplanetas

Los objetivos genéricos de este Proyecto son: 1) el estudio de la estructura y dinámica del interior solar, 2) la extensión de dicho estudio al caso de otras estrellas, 3) la búsqueda y caracterización de planetas extrasolares por métodos fotométricos (principalmente mediante el método de tránsitos) y espectroscópico (variaciones en la velocidad

Savita
Mathur
En ejecución
Image withthe projects' name
Exoplanetas y Astrobiología

La búsqueda de vida en el Universo se ha visto impulsada por los recientes descubrimientos de planetas alrededor de otras estrellas (los llamados exoplanetas), convirtiéndose en uno de los campos más activos dentro de la Astrofísica moderna. En los últimos años los descubrimientos cada vez más numerosos de nuevos exoplanetas y los últimos avances

Enric
Pallé Bago
En ejecución
Tipo
Con árbitro
Medio interplanetario
Física estelar e interestelar (FEEI)
Sistema Solar y Sistemas Planetarios (SEYSS)

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