Bellavista_obs on 07-Nov-2019 20:45:45 GMT about HD 184061
HD 184061, 2015-2019 spectral observations.
If useful for any further examination, I report some spectroscopic observations of the bright star HD 184061 (v mag 7.05) classified as B9.5 IV-V (1985ApJS...59...95A).
The H-alpha profile consists of a symmetric double-peaked emission component (~60 Km/s V-R separation) centered on the photospheric absorption line. The emission intensity reaches about 1.3 times the continuum level. This profile remained fairly stable in my spectra since october 2015 (the first observation date).
A double-peaked emission component is visible also in the bottom of H-beta photospheric absorption line. Peaks intensity is far below the continuum level.
The shape of Balmer lines resembles those of some Be stars, whose spectra may exhibit circumstellar emissions. You can view the profiles at the following link:
Spectra (http://www.spectro-aras.com/forum/viewtopic.php?f=32&t=1282&p=13331#p13331)
Spectra are obtained with amateur class equipment: 0.23m aperture SC telescope, Lhires III spectrograph using 2400 l/mm, 1200 l/mm and 600 l/mm gratings.
Log of observations (UT times, resolving power, spectral interval, note):
26/09/2019 17:58, R ~9000, 4770A-4956A, Double peaked H-beta emission component
17/09/2019 18:07, R ~16000, 6490A-6632A, Double peaked H-alpha emission component
12/09/2019 19:17, R ~6000, 6328A-6793A, Double peaked H-alpha emission component
22/09/2016 20:45, R ~6000, 6335A-6786A, Double peaked H-alpha emission component
24/10/2015 17:08, R ~6000, 6332A-6786A, Double peaked H-alpha emission component
23/10/2015 18:25, R ~3000, 4038A-4531A, No emission lines - to check the luminosity class
17/10/2015 18:23, R ~2500, 6358A-7060A, H-alpha emission component, double peak not resolved
All spectral profiles in FITS standard are available.
Paolo Berardi
Bellavista Observatory, IAU code MPC C93 - L'Aquila, Italy
ARAS (http://www.astrosurf.com/aras/) (Astronomical Ring for Access to Spectroscopy) group member
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