1,071 datasets found

We present here the first light curves of the peculiar Algol binary system R Canis Majoris obtained in the near-infrared photometric bands J and K. The light curves are fitted...

Micrometer measures of 795 double stars made with the 26 inch (0.66m) refractor of the US Naval Observatory from 1984 to 1990 are presented. Cone search capability for table...

We present time-series CCD photometry of a field in the newly discovered dwarf spheroidal galaxy in Sagittarius (hereafter Sgr), and of a nearby control field. These data, which...

Orbital elements and ephemerides for 9 visual double stars are given. Cone search capability for table J/A+AS/132/253/table (General parameters)

624 Micrometer Measurements of 224 pairs with a 32.5 cm Cassegrain, 719 Measurements of 310 double stars with a 360 mm Newtonian are given. Cone search capability for table...

The paper reports about a systematic study of the mean magnetic field modulus of Ap stars with magnetically resolved split lines. Tables 2a and 2b present the main properties of...

We give a simple, but accurate method that can be used to account for illumination in compact binary systems which have a low-mass companion, even if spherically symmetric...

This paper presents new orbits for two visual double stars COU 247 (CCDM 00095+1907) and ADS 3672 (STT 95, CCDM 05055+1948) and a revised orbit for ADS 15182 (A 772, CCDM...

(no description available)

The relative sunspot number (SN) is the primary index of solar activity back to 1610. For earlier periods, SN can be reconstructed from the concentrations of cosmogenic...

We have used strong gravitational lensing to perform a study of the mass distribution of the galaxy cluster MACS J0035.4-2015 by modeling its total mass distribution, and at the...

Gravitationally lensed type Ia supernovae (glSNe Ia) are unique astronomical tools that can be used to study cosmological parameters, distributions of dark matter, the...

Hot sub-luminous stars represent a population of stripped and evolved red giants located at the Extreme Horizontal Branch (EHB). Since they exhibit a wide range of variability...

Spider pulsars are millisecond pulsars in tight binary systems in which a low-mass companion star is heated and ablated by the pulsar wind. Observations of these objects allow...

Gravitational microlensing is a phenomenon that allows us to observe dark remnants of stellar evolution even if they no longer emit electromagnetic radiation. In particular, it...

Eclipsing binaries are crucial for understanding stellar physics, allowing detailed studies of stellar masses, radii, and orbital dynamics. Recent space missions like the...

Classical Cepheids provide valuable insights into the evolution of stellar multiplicity among intermediate-mass stars. Here, we present a systematic investigation of...

Tidal deformation breaks the axisymmetric structure of stars, and this may affect stellar activity. This effect has been demonstrated in theoretical analyses and simulations,...

Investigating the flow of material along filamentary structures towards the central core can help provide insights into high-mass star formation and evolution. Our main...

About 20% of white dwarfs possess a magnetic field that may be detected by the splitting and/or polarisation of their spectral lines. As they cool, white dwarfs evolve to such a...