Results 101 to 110 of about 20,255 (236)

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 open cluster Berkeley 53

, 2009
We present a photometric study of the neglected open cluster Berkeley 53. We derived its fundamental parameters, such as the age, the interstellar reddening, and the distance from the Sun, based on BV photometry combined with near-infrared JHK data.
Dias, Giraldi, King, Kroupa, Maciejewski, Maciejewski, Majewski, Markov, Niedzielski, Odewahn, Ruprecht, Schlegel, Strutskie   +12 more
core   +2 more sources

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

The distance to the young cluster NGC 7129 and its age

, 2013
The dust cloud TGU H645 P2 and embedded in it young open cluster NGC 7129 are investigated using the results of medium-band photometry of 159 stars in the Vilnius seven-colour system down to V = 18.8 mag.
Boyle, R. P., Kazlauskas, A., Laugalys, V., Maskoliunas, M., Moroni, P. G. Prada, Straizys, V., Tognelli, E., Zdanavicius, J., Zdanavicius, K.   +8 more
core   +1 more source

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

Spatially resolved Spectro-photometry of M81: Age, Metallicity and Reddening Maps

, 2000
In this paper, we present a multi-color photometric study of the nearby spiral galaxy M81, using images obtained with the Beijing Astronomical Observatory 60/90 cm Schmidt Telescope in 13 intermediate-band filters from 3800 to 10000{\AA}.
Alloin D., Bessell M. S., Bressan A., Bressan A., Chiosi C., Diaz A., Erdelyi-Mendes M., Fagotto F., Fioc M., Fluks M. A., Fuzhen Cheng, Goerdt A., Haojing Yan, Hong Wu, Hongjun Su, J. Jeff Hester, Jablonka P., Jiansheng Chen, Jin Zhu, Kong X., Licai Deng, Mallik S. V., Ostlin G., Pagel B. E. J., Rogier A. Windhorst, Rui Chen, Schaerer D., Schmitt H. R., Shude Mao, Suijian Xue, Tantalo R., Tinsley B. M., Wean-shun Tsay, Wei-hsin Sun, Weipeng Lin, Wen Xu, Wen-ping Chen, Xiaohui Fan, Xiaoyang Xia, Xu Kong, Xu Zhou, Yong Li, Yong-Ik Byun, Zhaohui Shang, Zhaoji Jiang, Zheng Zheng, Zhenglong Zou, Zhongyuan Zheng, Zhou X.   +48 more
core   +1 more source

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

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

2mass/Hipparcos Extinctions and Distances in the Serpens - Aquila Region.IV. Error Propagation. Individual stars and mean values [PDF]

, 2011
We estimate errors from the application of the main sequence $(H-K)_0 \ vs. \ (J-H)_0$ and $(J-K)_0 \ vs. \ M_J$ relations on 2mass photometry to provide stellar extinctions and distances.
Knude, Jens
core   +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