Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
Photometric activity of UX orionis stars and related objects in the near infrared and optical : CO Ori, RR Tau, UX Ori, and VV Ser. / Shenavrin, V. I.; Rostopchina-Shakhovskaya, A. N.; Grinin, V. P.; Demidova, T. V.; Shakhovskoi, D. N.; Belan, S. P.
в: Astronomy Reports, Том 60, № 8, 01.08.2016, стр. 753-767.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
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TY - JOUR
T1 - Photometric activity of UX orionis stars and related objects in the near infrared and optical
T2 - CO Ori, RR Tau, UX Ori, and VV Ser
AU - Shenavrin, V. I.
AU - Rostopchina-Shakhovskaya, A. N.
AU - Grinin, V. P.
AU - Demidova, T. V.
AU - Shakhovskoi, D. N.
AU - Belan, S. P.
N1 - Publisher Copyright: © 2016, Pleiades Publishing, Ltd.
PY - 2016/8/1
Y1 - 2016/8/1
N2 - This paper continues a study of the photometric activity of UX Ori stars in the optical and near-infrared (JHKLM bands) initiated in 2000. For comparison, the list of program stars contains two Herbig Ae stars that are photometrically quiet in the optical: MWC480 andHD179218. Fadings ofUXOri stars in the optical (V band) due to sporadic increases of the circumstellar extinction are also observed in the infrared (IR), but with decreasing amplitude. Two stars, RR Tau and UX Ori, displayed photometric events when V -band fadings were accompanied by an increase in IR fluxes. Among the two Herbig Ae stars that are photometrically quiet in the optical, MWC 480 proved to be fairly active in the IR. Unlike the UX Ori stars, the variation amplitude of MWC 480 increases from the J band to the M band. In the course of the observations, no deep fadings in the IR bands were detected. This indicates that eclipses of the program stars have a local nature, and are due to extinction variations in the innermost regions of the circumstellar disks. The results presented testify to an important role of the alignment of the circumstellar disks relative to the direction towards the observer in determining the observed IR variability of young stars.
AB - This paper continues a study of the photometric activity of UX Ori stars in the optical and near-infrared (JHKLM bands) initiated in 2000. For comparison, the list of program stars contains two Herbig Ae stars that are photometrically quiet in the optical: MWC480 andHD179218. Fadings ofUXOri stars in the optical (V band) due to sporadic increases of the circumstellar extinction are also observed in the infrared (IR), but with decreasing amplitude. Two stars, RR Tau and UX Ori, displayed photometric events when V -band fadings were accompanied by an increase in IR fluxes. Among the two Herbig Ae stars that are photometrically quiet in the optical, MWC 480 proved to be fairly active in the IR. Unlike the UX Ori stars, the variation amplitude of MWC 480 increases from the J band to the M band. In the course of the observations, no deep fadings in the IR bands were detected. This indicates that eclipses of the program stars have a local nature, and are due to extinction variations in the innermost regions of the circumstellar disks. The results presented testify to an important role of the alignment of the circumstellar disks relative to the direction towards the observer in determining the observed IR variability of young stars.
UR - http://www.scopus.com/inward/record.url?scp=84980349565&partnerID=8YFLogxK
U2 - 10.1134/S1063772916070064
DO - 10.1134/S1063772916070064
M3 - Article
AN - SCOPUS:84980349565
VL - 60
SP - 753
EP - 767
JO - Astronomy Reports
JF - Astronomy Reports
SN - 1063-7729
IS - 8
ER -
ID: 94871019