Mon. Not. R. Astron. Soc., 432, 2273-2283 (2013/July-1)
A family of cometary globules at the periphery of Cyg OB1: the star HBHA 3703-01 and the reflection nebula GM 2-39.
ARKHIPOVA V.P., EGOROV O.V., ESIPOV V.F., IKONNIKOVA N.P., LOZINSKAYA T.A., RUDNITSKIJ G.M., SITNIK T.G., TATARNIKOV A.M., TSVETKOV D.Yu. and ZHAROVA A.V.
Abstract (from CDS):
The interstellar medium in the region of a family of cometary globules including the reflection nebula GM 2-39 has been analysed based on our observations with a slit spectrograph, the results of our previous observations with a Fabry-Perot interferometer in the Hα line and Spitzer archival data (Hora et al.), together with CO microwave data (Leung & Thaddeus). The structure of the infrared emission of the globules, the velocity field of ionized gas in the Hα line and molecular gas in the CO line have been considered. We have detected a CO cavern around the eastern globules and faint high-velocity Hα features of the surrounding gas. The most probable sources of ionizing radiation and wind from stars of the Cyg OB1 association responsible for globule formation are proposed. Based on our multicolour photometry, it has been found that the brightest compact source in the southern `head' of the cometary globule - the star HBHA 3703-01 (IRAS 20153+3850) - is a B(5-6)V star with E(B - V) = 1.18 mag. A strong and broad Hα emission line was revealed in its spectrum. The spectral energy distribution of HBHA 3703-01 in the 0.44-24 µm range has been modelled. It is shown that the star has a hot dust envelope with Tdust = 1400 K and τV = 1.1. Additionally, the star HBHA 3703-01 illuminates the encompassing diffuse nebula GM 2-39 with a diameter of about 30 arcsec. With regard to all obtained observational data for HBHA 3703-01, this object may be classified as a Herbig Ae/Be star.
© 2013 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society (2013)
stars: individual: HBHA 3703-01 - ISM: clouds - ISM: individual objects: GM 2-39 - ISM: kinematics and dynamics - ISM: lines and bands - infrared: ISM
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