Massive Stars in the SDSS-IV/APOGEE SURVEY. I. OB Stars
In this work, we make use of DR14 APOGEE spectroscopic data to study a sample of 92 known OB stars. We developed a near-infrared semi-empirical spectral...
Massive Stars in the SDSS-IV/APOGEE-2 Survey. II. OB-stars in the W345 Complexes
In this work, we have applied a semi-empirical spectral classification method for OB-stars using the APOGEE spectrograph to a sample of candidates in the W3–W4...
We emphasize in this paper the importance of the UV range for our knowledge of massive stars and the fundamental role played by past and present space-based UV...
MASTER Optical Detection of the First LIGO/Virgo Neutron Star Binary Merger GW170817
Following the discovery of the gravitational-wave source GW170817 by three Laser Interferometer Gravitational-wave Observatory (LIGO)/Virgo antennae (Abbott et...
MASTER Optical Polarization Variability Detection in the Microquasar V404 Cyg/GS 2023+33
On 2015 June 15, the Swift space observatory discovered that the Galactic black hole candidate V404 Cyg was undergoing another active X-ray phase, after 25...
Matter ejections behind the highs and lows of the transitional millisecond pulsar PSR J1023+0038
Transitional millisecond pulsars are an emerging class of sources that link low-mass X-ray binaries to millisecond radio pulsars in binary systems. These...
MCAO near-IR photometry of the globular cluster NGC 6388: MAD observations in crowded fields
Context: Deep photometry of crowded fields, such as Galactic globular clusters, is severely limited by the resolution of ground-based telescopes. On the other...
Measurability of vacuum fluctuations and dark energy
Vacuum fluctuations of the electromagnetic field induce current fluctuations in resistively shunted Josephson junctions that are measurable in terms of a...
Measurement and astrometric reduction of CCD images in Bucharest
The paper presents the methods of measurement and astrometric reduction of the CCD images made at Bucharest Astronomical Observatory beginning with 1995. We...