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We determine 37 differential extinctions in 23 gravitational lens galaxies over the range 0 < z_l < 1. Only 7 of the 23 systems have spectral differences consistent with no differential extinction. The median differential extinction for the…

Interstellar dust plays a central role in shaping the detailed structure of the interstellar medium, thus strongly influencing star formation and galaxy evolution. Dust extinction provides one of the main pillars of our understanding of…

We present determinations of the total to selective extinction ratio R_V and visual extinction A_V values for Milky Way stars using ultraviolet color excesses. We extend the analysis of Gnacinski and Sikorski (1999) by using non-equal…

Astrophysics · Physics 2007-05-23 Anna Geminale , Piotr Popowski

This paper corrects and completes a previous study of the shape of the extinction curve in the visible and the value of Rv. A continuous visible/infrared extinction law proportional to 1/{\lambda}^p with p close to 1 ({\pm}0.4) is…

Astrophysics of Galaxies · Physics 2015-06-05 Frederic Zagury , David Turner

The characterisation of the extinction curve in the near infrared (NIR) is fundamental to analyse the structure and stellar population of the Galactic centre (GC), whose analysis is hampered by the extreme interstellar extinction ($A_V\sim…

The standard interpretation of the extinction curve does not agree with some observations. The light we receive from a reddened star must be contaminated by starlight scattered at very small angular distances from the star. The true…

Astrophysics · Physics 2007-05-23 Frederic Zagury

We present our progress on the study of extinction laws along three diferent lines. [a] We compare how well different families of extinction laws fit existing photometric data for Galactic sightlines and we find that the Ma\'iz Apell\'aniz…

Astrophysics of Galaxies · Physics 2016-10-05 J. Maíz Apellániz , E. Trigueros Páez , A. Bostroem , R. H. Barbá , C. J. Evans

In order to study the properties and effects of high Galactic latitude dust we present an analysis of 373,303 galaxies selected from the Galaxy Evolution Explorer (GALEX) All-Sky Survey and Wide-Field Infrared Explorer (WISE) All-Sky Data…

Astrophysics of Galaxies · Physics 2015-06-15 J. E. G. Peek , David Schiminovich

We critique the method of constructing extinction curves of lensing galaxies using multiply imaged QSOs. If one of the two QSO images is lightly reddened or if the dust along both sightlines has the same properties then the method works…

Astrophysics · Physics 2009-11-10 Christina McGough , Geoffrey C. Clayton , Karl D. Gordon , Michael J. Wolff

A precise measure of the mid-infrared interstellar extinction law is crucial to the investigation of the properties of interstellar dust, especially of the grains in the large size end. Based on the stellar parameters derived from the…

Astrophysics of Galaxies · Physics 2016-11-10 Mengyao Xue , Biwei Jiang , Jian Gao , Jiaming Liu , Shu Wang , Aigen Li

Multicolor photometry from the Tycho-2 and 2MASS catalogues for 11 990 OB and 30 671 K-type red giant branch stars is used to detect systematic large-scale variations of the interstellar extinction law within the nearest kiloparsec. The…

Solar and Stellar Astrophysics · Physics 2016-07-04 George Gontcharov

We have measured the extinction curve in the far-ultraviolet wavelength region of (900 -- 1200 A) using spectra obtained with the Berkeley EUV/FUV spectrometer during the ORFEUS-I and the ORFEUS-II missions in 1993 and 1996. From the…

Astrophysics · Physics 2009-11-07 T. P. Sasseen , M. Hurwitz , W. V. Dixon , S. Airieau

We model the ~1--19$\mum$ infrared (IR) extinction curve toward the Galactic Center (GC) in terms of the standard silicate-graphite interstellar dust model. The grains are taken to have a power law size distribution with an exponential…

Astrophysics of Galaxies · Physics 2015-06-16 Jian Gao , Aigen Li , B. W. Jiang

The nature of Galactic interstellar extinction is tested using reddening line parameters for several fields in conjunction with equivalent widths $W(\lambda4430)$ for the diffuse interstellar band at $4430$ \AA. The Cardelli et…

Astrophysics of Galaxies · Physics 2015-06-22 David G. Turner , Daniel J. Majaess , David D. Balam

The interstellar extinction law is important for interpreting observations and inferring the properties of interstellar dust grains. Based on the 993 prism/CLEAR spectra from the James Webb Space Telescope (JWST), we investigate…

Astrophysics of Galaxies · Physics 2024-02-28 Shu Wang , Xiaodian Chen

We analyze the optical-near infrared spectra of 33 quasars with redshifts 3.9<z<6.4 to investigate the properties of dust extinction at these cosmic epochs. The SMC extinction curve has been shown to reproduce the dust reddening of most…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-19 S. Gallerani , R. Maiolino , Y. Juarez , T. Nagao , A. Marconi , S. Bianchi , R. Schneider , F. Mannucci , T. Oliva , C. J. Willott , L. Jiang , X. Fan

Interstellar dust extinction law is essential for interpreting observations. In this work, we investigate the ultraviolet (UV)--mid-infrared (IR) extinction law of the Taurus molecular cloud and its possible variations. We select 504,988…

Astrophysics of Galaxies · Physics 2023-08-07 Ling Li , Shu Wang , Xiaodian Chen , Qingquan Jiang

Interstellar extinction towards the Galactic Center is large and significantly differential. Its reddening and dimming effects in red clump stars in the Galactic Bulge can be exploited to better constrain the extinction law towards the…

We measure the extinction law in a galaxy's spiral arm and interarm regions using a visual and infrared (BVRJHK) imaging study of the interacting galaxies NGC 2207 and IC 2163. This is an overlapping spiral galaxy pair in which NGC 2207…

Astrophysics · Physics 2016-08-30 Andreas A. Berlind , A. C. Quillen , R. W. Pogge , K. Sellgren

We present a direct measurement of extinction curves using corrected $Gaia$ XP spectra of the common sources in $Gaia$ DR3 and LAMOST DR7. Our analysis of approximately 370 thousand high-quality samples yielded a high-precision average…

Astrophysics of Galaxies · Physics 2024-07-18 Ruoyi Zhang , Haibo Yuan , Bowen Huang , Tao Wang , Lin Yang , Gregory M. Green , Xiangyu Zhang