263 citations · 2.8k across the 80 of their papers we have counts for
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Two circumstellar nebulae discovered with the Wide-field Infrared Survey Explorer and their massive central stars
V. V. Gvaramadze, A. Y. Kniazev, N. Castro +1
We report the discovery of two mid-infrared nebulae in the northern hemisphere with the Wide-field Infrared Survey Explorer and the results of optical spectroscopy of their central…
CPD-64 2731: a massive spun-up and rejuvenated high-velocity runaway star
V. V. Gvaramadze, O. V. Maryeva, A. Y. Kniazev +4
We report the results of our study of the high-velocity (\approx160 km/s) runaway O star CPD-64 2731 and its associated horseshoe-shaped nebula discovered with the Wide-field Infra…
Resolved Kinematics of Runaway and Field OB Stars in the Small Magellanic Cloud
M. S. Oey, J. Dorigo Jones, N. Castro +6
We use GAIA DR2 proper motions of the RIOTS4 field OB stars in the Small Magellanic Cloud (SMC) to study the kinematics of runaway stars. The data reveal that the SMC Wing has a sy…
The spectroscopic Hertzsprung-Russell diagram of hot massive stars in the SMC
N. Castro, M. S. Oey, L. Fossati +1
We present a comprehensive stellar atmosphere analysis of 329 O- and B-type stars in the Small Magellanic Cloud (SMC) from the RIOTS4 survey. Using spectroscopically derived effect…
Origin of a massive hyper-runaway subgiant star LAMOST-HVS1 -- implication from Gaia and follow-up spectroscopy
Kohei Hattori, Monica Valluri, Norberto Castro +3
We report that LAMOST-HVS1 is a massive hyper-runaway subgiant star with mass of 8.3 Msun and super-Solar metallicity, ejected from the inner stellar disk of the Milky Way 3…
Detection of magnetic fields in He-rich early B-type stars using HARPSpol
S. P. Järvinen, S. Hubrig, I. Ilyin +4
We focus on early-B type stars with helium overabundance, for which the presence of a magnetic field has not previously been reported. The measurements were carried out using high-…