Variability of the OH and H2O maser emission toward AS 501


Дәйексөз келтіру

Толық мәтін

Ашық рұқсат Ашық рұқсат
Рұқсат жабық Рұқсат берілді
Рұқсат жабық Тек жазылушылар үшін

Аннотация

The results of observations of OH (λ = 18 cm) and H2O (λ = 1.35 cm) masers toward AS 501 obtained with the Nançay Observatory Radio Telescope (France) and the 22-m radio telescope of the Pushchino Radio Astronomy Observatory (Russia), respectively, are presented. Nine cycles of H2O maser activity ranging from 2.8 to 6.0 years were detected, identifying AS 501 as an irregular variable star. Zeeman splitting was found only in the 1612-MHz satellite line at −59.2 km/s. The splitting is 0.11 km/s, corresponding to a line-of-sight magnetic field strength of 0.48 mG. The field is directed toward the observer. The detected radial-velocity drift of the H2O emission features can be explained in a model with elongated filaments with radial-velocity gradients.

Авторлар туралы

N. Ashimbaeva

Sternberg Astromical Institute

Email: lekht@sai.msu.ru
Ресей, Universitetskii pr. 13, Moscow, 119992

P. Colom

LESIA, Observatoire de Paris-Meudon, CNRS, UPMC

Email: lekht@sai.msu.ru
Франция, Meudon

V. Krasnov

Pushchino Radio Astronomy Observatory, Astro Space Center, Lebedev Physical Institute

Email: lekht@sai.msu.ru
Ресей, Pushchino, 142290

E. Lekht

Sternberg Astromical Institute

Хат алмасуға жауапты Автор.
Email: lekht@sai.msu.ru
Ресей, Universitetskii pr. 13, Moscow, 119992

M. Pashchenko

Sternberg Astromical Institute

Email: lekht@sai.msu.ru
Ресей, Universitetskii pr. 13, Moscow, 119992

G. Rudnitskii

Sternberg Astromical Institute

Email: lekht@sai.msu.ru
Ресей, Universitetskii pr. 13, Moscow, 119992

A. Tolmachev

Pushchino Radio Astronomy Observatory, Astro Space Center, Lebedev Physical Institute

Email: lekht@sai.msu.ru
Ресей, Pushchino, 142290

Қосымша файлдар

Қосымша файлдар
Әрекет
1. JATS XML

© Pleiades Publishing, Ltd., 2017