Results 61 to 70 of about 20,011 (211)

oMEGACat. VII. Tracing Interstellar and Intracluster Medium of ω Centauri Using Sodium Absorptions

The Astrophysical Journal
We investigate the foreground interstellar medium along the line of sight and intracluster medium of ω Centauri ( ω Cen) by measuring the equivalent width of Na I D absorptions from MUSE observations. The large line-of-sight velocity difference between ω
Z. Wang, A. C. Seth, M. Latour, J. Strader, M. Häberle, N. Neumayer, C. Clontz, S. Kamann, M. S. Nitschai, M. Alfaro-Cuello, A. Bellini, A. Feldmeier-Krause, M. Libralato, A. P. Milone, P. J. Smith, S. O. Souza, G. van de Ven   +16 more
doaj   +1 more source

Large Interstellar Polarisation Survey

Astronomy & Astrophysics
Our understanding of dust in the diffuse interstellar medium remains incomplete with regard to the structure, composition, size distribution, and alignment properties of its grains.
Siebenmorgen Ralf, Bagnulo Stefano, Fanciullo Lapo, Vannieuwenhuyse Thomas, Guillet Vincent   +4 more
doaj   +1 more source

The Panchromatic Hubble Andromeda Treasury. XX. The Disk of M31 is Thick

The Astronomical Journal, 2023
We present a new approach to measuring the thickness of a partially face-on stellar disk, using dust geometry. In a moderately-inclined disk galaxy, the fraction of reddened stars is expected to be 50% everywhere, assuming that dust lies in a thin ...
Julianne J. Dalcanton, Eric F. Bell, Yumi Choi, Andrew E. Dolphin, Morgan Fouesneau, Léo Girardi, David W. Hogg, Anil C. Seth, Benjamin F. Williams   +8 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

Non-uniform extinction in young open star clusters [PDF]

, 2001
The extinction law and the variation of colour excess with position, luminosity as well as spectral class in young open star clusters NGC 663, NGC869, NGC 884, NGC 1502, NGC 1893, NGC 2244, NGC 2264, NGC 6611, Tr 14, Tr 15,Tr 16, Coll 228, Tr 37 and Be ...
Sagar, Ram, Yadav, R. K. S.
core   +3 more sources

The 2000 outburst of the recurrent nova CI Aquilae: optical spectroscopy

, 2000
We present low- and medium resolution spectra of the recurrent nova CI Aquilae taken at 14 epochs in May and June, 2000. The overall appearance is similar to other U Sco-type recurrent novae (U Sco, V394 CrA).
Anupama, Capaccioli, Della Valle, Duerbeck, G. Fűrész, Gill, J. R. Thomson, Jenniskens, K. Sziládi, L. L. Kiss, Mazuk, Munari, Munari, Oudmaijer, Reinmuth, Schmidt, Sekiguchi, Sekiguchi, Szkody, Takamizawa, W. Ogloza, Williams, Williams   +22 more
core   +1 more source

Properties of extragalactic dust inferred from linear polarimetry of Type Ia Supernovae [PDF]

, 2015
Aims: The aim of this paper is twofold: 1) to investigate the properties of extragalactic dust and compare them to what is seen in the Galaxy; 2) to address in an independent way the problem of the anomalous extinction curves reported for reddened Type ...
Baade, D., Clocchiatti, A., Cox, N. L. J., Hoeflich, P., Maund, J. R., Patat, F., Reilly, E., Spyromilio, J., Taubenberger, S., Wang, L., Wheeler, J. C., Zelaya, P.   +11 more
core   +3 more sources

Interstellar Reddening Effect on the Age Dating of Population II Stars

Galaxies, 2017
The age measurement of the stellar halo component of the Galaxy is based mainly on the comparison of the main sequence turn-off luminosity of the globular cluster (GC) stars with theoretical isochrones.
Sergio Ortolani, Santi Cassisi, Maurizio Salaris   +2 more
doaj   +1 more source

The Effect of a Nonuniversal Extinction Curve on the Wesenheit Function and Cepheid Distances

The Astrophysical Journal Letters
The Wesenheit function is widely used to reduce the effects of interstellar reddening in distance measurements. Its construction, however, relies on the assumption of a universal extinction curve and on fixed values of the total-to-selective extinction ...
Dorota M. Skowron, Morgan Fouesneau, Ronald Drimmel, Shourya Khanna   +3 more
doaj   +1 more source

Three-dimensional Reddening Maps of the Magellanic Clouds Constructed by RR Lyrae Stars

The Astronomical Journal
We present the first three-dimensional reddening maps of the Large and Small Magellanic Clouds (LMC and SMC) constructed using fundamental-mode RR Lyrae stars (RRab) from the Optical Gravitational Lensing Experiment (OGLE) survey.
Shun-Xuan He, Yang Huang
doaj   +1 more source