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Early Results from the Galactic O-Star Spectroscopic Survey: C III Emission Lines in Of Spectra
Nolan R. Walborn, Alfredo Sota, Jesus Maiz Apellaniz +5
On the basis of an extensive new spectroscopic survey of Galactic O stars, we introduce the Ofc category, which consists of normal spectra with C III λ\lambda4647-4650-4652 emissio…
The Onfp Class in the Magellanic Clouds
Nolan R. Walborn, Ian D. Howarth, Christopher J. Evans +8
The Onfp class of rotationally broadened, hot spectra was defined some time ago in the Galaxy, where its membership to date numbers only eight. The principal defining characteristi…
On the multiplicity of the zero-age main-sequence O star Herschel 36
Julia I. Arias, Rodolfo H. Barba, Roberto C. Gamen +6
We present the analysis of high-resolution optical spectroscopic observations of the zero-age main-sequence O star Herschel 36 spanning six years. This star is definitely a multipl…