Results 101 to 110 of about 50,798 (260)

Analytic formulas for frequency and size dependence of absorption and scattering efficiencies of astronomical polycyclic aromatic hydrocarbons

, 2012
In a series of two recent papers, the frequency and size distribution dependence of extinction spectra for astronomical silicate and graphite grains was analyzed by us in the context of MRN type interstellar dust models.
Ashim K. Roy, Cardelli, Cecchi-Pestellini, Donn, Draine, Draine, Draine, Fitzpatrick, Klacka, Li, Li, Li, Mathis, Pendorf, Platt, Pritesh Ranadive, Ranjan Gupta, Roy, Roy, Subodh K. Sharma, Weingartner   +20 more
core   +1 more source

Modelling extragalactic extinction through gamma-ray burst afterglows [PDF]

, 2016
We analyze extragalactic extinction profiles derived through gamma-ray burst afterglows, using a dust model specifically constructed on the assumption that dust grains are not immutable but respond time-dependently to the local physics.
Aresu, Giambattista, Casu, Silvia, Cecchi-Pestellini, Cesare, Mulas, Giacomo, Zonca, Alberto   +4 more
core   +2 more sources

The deep eclipses of RW Aur revisited by long‐term photometric and spectroscopic monitoring

Astronomische Nachrichten, Volume 345, Issue 4, May 2024.
Abstract RW Aurigae is a young stellar system containing a classical T Tauri star as the primary component. It shows deep, irregular dimmings, first detected in 2010. At the University Observatory Jena, we carried out optical follow‐up observations. We performed multiband (BVRI) photometry of the system with the Cassegrain‐Teleskop‐Kamera II and the ...
Oliver Lux, Markus Mugrauer, Richard Bischoff   +2 more
wiley   +1 more source

Interstellar polarization and grain alignment: the role of iron and silicon

, 2012
We compiled the polarimetric data for a sample of lines of sight with known abundances of Mg, Si, and Fe. We correlated the degree of interstellar polarization $P$ and polarization efficiency (the ratio of $P$ to the colour excess $E(B-V)$ or extinction $
Abbas, Andersson, Andersson, Andersson, Andersson, Asplund, Belley, Das, Davis, Djouadi, Draine, Draine, Duley, Efimov, Elias, Fitzpatrick, Ghosh, H. K. Das, Harries, Heiles, Il’in, Jones, Kim, Kimura, Kimura, Kocifaj, Krauß, Larson, Lazarian, Lazarian, Leroy, M. S. Prokopjeva, Marraco, Martin, Mathis, Matsumura, McDavid, Michel, Min, Molster, N. V. Voshchinnikov, Niyogi, Oudmaijer, Patriarchi, Poeckert, Purcell, Roche, Serkowski, Sorrell, Sorrell, Sturm, Th. Henning, Valencic, van Breemen, Vega, Vink, Voshchinnikov, Voshchinnikov, Voshchinnikov, Voshchinnikov, Wegner, Wegner, Weingartner, Weitenbeck, Whittet, Whittet   +65 more
core   +1 more source

The Multiwavelength Extinction Law and Its Variation in the Coalsack Molecular Cloud Based on the Gaia, APASS, SMSS, 2MASS, GLIMPSE, and WISE Surveys

The Astrophysical Journal
Accurate interpretation of observations relies on the interstellar dust extinction law, which also serves as a powerful diagnostic for probing dust properties.
Juan Deng, Shu Wang, Biwei Jiang, He Zhao   +3 more
doaj   +1 more source

Overlapping Open Clusters NGC 1750 and NGC 1758 behind the Taurus Dark Clouds. II. CCD Photometry in the Vilnius System

Open Astronomy, 2003
Seven-color photometry in the Vilnius system has been obtained for 420 stars down to V = 16 mag in the area containing the overlapping open clusters NGC 1750 and NGC 1758 in Taurus.
Straižys V., Kazlauskas A., Černiauskas A., Boyle R. P., Vrba F. J., Philip A. G. Davis, Laugalys V., Černis K., Smriglio F.   +8 more
doaj   +1 more source

The mid-infrared extinction law in the darkest cores of the Pipe Nebula

, 2012
Context. The properties of dust grains, in particular their size distribution, are expected to differ from the interstellar medium to the high-density regions within molecular clouds. Aims.
Alves, J., Ascenso, J., Lada, C. J., Lombardi, M., Román-Zúñiga, C. G.   +4 more
core   +1 more source

The Extinction Properties of and Distance to the Highly Reddened Type Ia Supernova SN 2012cu [PDF]

, 2017
Correction of Type Ia Supernova brightnesses for extinction by dust has proven to be a vexing problem. Here we study the dust foreground to the highly reddened SN 2012cu, which is projected onto a dust lane in the galaxy NGC 4772.
A. G. Kim, A. Stocker, B. Hayden, C. Baltay, C. Buton, C. Saunders, C. Sofiatti, C. Tao, D. Baugh, D. Fouchez, D. Rabinowitz, D. Rubin, E. Gangler, E. Pecontal, G. Aldering, G. Smadja, H. K. Fakhouri, J. Chen, J. Nordin, K. Barbary, K. Boone, K. Runge, M. Kowalski, M. Rigault, N. Chotard, N. Suzuki, null null, P. Antilogus, P. Fagrelius, P.-F. Leget, R. C. Thomas, R. Pain, R. Pereira, S. Bailey, S. Bongard, S. Lombardo, S. Perlmutter, S. Taubenberger, U. Feindt, W. Hillebrandt, X. Huang, Y. Copin, Z. Raha   +42 more
core   +5 more sources

Limitations of the modified blackbody fit method for determining molecular cloud properties

Astronomische Nachrichten, Volume 345, Issue 4, May 2024.
Abstract Achieving a comprehensive understanding of the star and planet formation process is one of the fundamental tasks of astrophysics, requiring detailed knowledge of the physical conditions during the different phases of this process. During the earliest stages, that is, concerning physical processes in molecular clouds and filaments, the column ...
Niko Zielinski, Sebastian Wolf
wiley   +1 more source

Probing the Distinct Extinction Law of the Pillars of Creation in M16 with JWST

The Astrophysical Journal Letters
Investigating the extinction law in regions of high dust extinction, such as the Pillars of Creation within the M16 region, is crucial for understanding the densest parts of the interstellar medium (ISM).
Jun Li, Bingqiu Chen, Biwei Jiang, Jian Gao, Xi Chen   +4 more
doaj   +1 more source