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Radial velocity in a Wolf-Rayet/O-star couple
We present the first visual orbit for the nitrogen-rich Wolf-Rayet binary, WR133 (WN5o+O9I), based on observations made with the CHARA Array and the MIRC-X combiner. This orbit... -
WR central stars and their host PN
We address the physical and kinematical properties of Wolf-Rayet [WR] central stars (CSs) and their host planetary nebulae (PNe). The studied sample comprises all [WR] CSs that... -
Photometric variability of WR 103
We discuss a collection of archival multi-colour photometric data of the variable WC9-type Wolf-Rayet star WR103=HD164270 observed over a time interval of eleven years. The... -
Infrared properties of planetary nebulae
We report the infrared (IR) properties of planetary nebulae (PNe) with Wolf-Rayet (WR) type and wels central stars known to date and compare them with the IR properties of a... -
Galactic Wolf-Rayet stars with Gaia DR2 I
We obtain distances to 383 Galactic Wolf-Rayet (WR) stars from Gaia DR2 parallaxes and Bayesian methods, with a prior based on HII regions and dust extinction. Distances agree... -
Variable dust emission by WC type Wolf-Rayets
Photometry at 3.4 and 4.6{mu}m of 128 Population I WC type Wolf-Rayet stars in the Galaxy and 12 in the Large Magellanic Cloud (LMC) observed in the WISE NEOWISE-R survey was... -
1.87 and 2.07um observations of 3 GC clusters
In order to investigate populations of massive stars in massive star clusters, we have constructed a near-infrared image set: narrow bands of 1.87 and 2.07{mu}m and the Ks... -
Nine WC 9 stars spectral variability
We present the results of a spectroscopic monitoring campaign of nine presumably single Wolf-Rayet (WR) stars, eight of type WC 9 and one WC 8d. We characterize their... -
Radial velocities of WR21a
We present multi-epoch spectroscopic observations of the massive binary system WR21a, which include the 2011 January periastron passage. Our spectra reveal multiple SB2 lines... -
NIR spectroscopy of Galactic WR stars. III
A new method of image subtraction is applied to images from a J, K, and narrow-band imaging survey of 300 deg2 of the plane of the Galaxy, searching for new Wolf-Rayet (WR)... -
Wolf-Rayet population in NGC 5068
We present a narrow-band Very Large Telescope/Focal Reduced Low-dispersion Spectrograph #1 imaging survey of the SAB(rs)cd spiral galaxy NGC 5068, located at a distance of... -
Wolf-Rayet population in NGC 1313
We present a VLT/FORS1 survey of Wolf-Rayet (WR) stars in the spiral galaxy NGC 1313. In total, 94 WR candidate sources have been identified from narrow-band imaging. Of these,... -
MC WC/WO stars - Colliding winds
Files br22rv.dat, br31rv.dat, br32rv.dat, ab8rv.dat, wr9rv.dat and wr30arv.dat contain spectroscopic radial velocity data of six Magellanic Cloud WC/WO class binary Wolf-Rayet... -
Multiwavelength survey of WR stars in LMC
Surveys of Wolf-Rayet (WR) stars in the Large Magellanic Cloud (LMC) have yielded a fairly complete catalog of 154 known stars. We have conducted a comprehensive,... -
RXTE, Swift & NICER obs. of WR 140
The long-period, highly eccentric Wolf-Rayet star binary system WR140 has exceptionally well-determined orbital and stellar parameters. Bright, variable X-ray emission is... -
Optical to NIR light curves of WR 122
We present optical and infrared (IR) light curves of NaSt1, also known as Wolf-Rayet 122, with observations from Palomar Gattini-IR (PGIR), the Zwicky Transient Facility (ZTF),... -
CII emission-line stars in LMC with MagE spectra
We present a narrowband imaging survey of the Large Magellanic Cloud (LMC), designed to isolate the CII{lambda}{lambda}7231,7236 emission lines in objects as faint as... -
Spectra of a rare low-mass Wolf-Rayet star in LMC
We report the serendipitous discovery of an object, UVQSJ060819.93-715737.4, with a spectrum dominated by extremely intense, narrow CII emission lines. The spectrum is similar... -
The fifth catalog of LMC Wolf-Rayet stars
We summarize the results of our 4yr survey searching for Wolf-Rayet (WR) stars in the Large Magellanic Cloud (LMC) and Small Magellanic Cloud. Over the course of this survey we... -
M33 WR and Of-type Stars
Massive star evolutionary models generally predict the correct ratio of WC-type and WN-type Wolf-Rayet stars at low metallicities, but underestimate the ratio at higher (solar...
