Results 81 to 90 of about 19,928 (198)

Benchmarking Differential Reddening in Front of Globular Clusters

The Astronomical Journal
Interstellar extinction is a major obstacle in determining accurate stellar parameters from photometry near the Galactic disk. It is especially true for globular clusters at low galactic latitudes, which suffer from significant amounts of spatially ...
Csilla Kalup, László Molnár
doaj   +1 more source

Star Classification Possibilities with the Gaia Spectrophotometers. II. A Method for Empirical Decontamination of the BP/RP Spectra

Open Astronomy, 2010
The contamination in the Gaia BP and RP spectra, caused by the LSF smearing, is a serious obstacle for the classification of stars since the contamination values at different wavelengths depend on temperatures, gravities, metallicities and interstellar ...
Straižys V., Lazauskaitė R., Zdanavičius K.   +2 more
doaj   +1 more source

The Stellar Content of Obscured Galactic Giant HII Regions V: G333.1--0.4

, 2004
We present high angular resolution near--infrared images of the obscured Galactic Giant HII (GHII) region G333.1--0.4 in which we detect an OB star cluster.
A. Damineli, E. Figuerêdo, Jonch-Sorensen H., Koornneef J., Oliva E., P. S. Conti, R. D. Blum, Schaller G., Siess L., Smith L. F., Vilas-Boas J. W. S.   +10 more
core   +1 more source

On the Relation between Interstellar Spectral Features and Reddening

Acta Astronomica, 2019
It is well known that interstellar spectral features correlate with color excess E(B$-$V). This suggests that measuring intensities of these features allows one to estimate reddening of stars. The aim of this paper is to check how tight intensities of interstellar diffuse bands (DIBs)are related to the amount of extinction, measured using E(B$-$V).
Krełowski, J., Galazutdinov, G., Godunova, V., Bondar, A.   +3 more
openaire   +2 more sources

Photoelectric Vilnius Photometry of Stars in the Mega Proper Motion Field KA 10

Open Astronomy, 2003
Photoelectric seven-color photometry in the Vilnius medium-band, system is obtained for 87 stars down to V≃13.0 in the Kiev proper motion field KA10 [l = 137°, b = -59°]. The size of the field is 1.4 square degrees.
Bartašiutė S.
doaj   +1 more source

Variations of Interstellar Gas-to-dust Ratios at High Galactic Latitudes

The Astrophysical Journal
Interstellar dust at high Galactic latitudes can influence astronomical foreground subtraction, produce diffuse scattered light, and soften the UV spectra of quasars.
J. Michael Shull, Georgia V. Panopoulou
doaj   +1 more source

Spectroscopy of hot subdwarf binaries

Open Astronomy, 2018
We present a status report of our spectroscopic analysis of subdwarf binaries consisting of a subdwarf and a F/G/K-type main-sequence companion. These systems selected from SDSS photometry show significant excess in the (infra-)red which can not be ...
Kreuzer Simon, Irrgang Andreas, Heber Ulrich   +2 more
doaj   +1 more source

First Evidence of Circumstellar Disks around Blue Straggler Stars

, 2004
We present an analysis of optical HST/STIS and HST/FOS spectroscopy of 6 blue stragglers found in the globular clusters M3, NGC6752 and NGC6397. These stars are a subsample of a set of ~50 blue stragglers and stars above the main sequence turn-off in ...
Bessell M. S., David Zurek, Hills J. G., John A. Ouellette, Michael M. Shara, Orsola De Marco, Thierry Lanz, Thorval S.   +7 more
core   +2 more sources

Extreme Starlight Polarization Efficiency toward ζ Ophiuchi: A Case for Line-of-sight Foreground Subtraction

The Astronomical Journal
Despite the pervasive nature of interstellar dust and its impact on nearly all observations, most dust corrections employ line-of-sight averages over large angular scales.
Jordan A. Bartlett, Henry A. Kobulnicky
doaj   +1 more source

Interstellar reddening towards six small areas in Puppis-Vela [PDF]

Astronomy & Astrophysics, 2012
Accepted by Astronomy and ...
openaire   +2 more sources