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A composite dust grain model which simultaneously explains the observed interstellar extinction, polarization, IR emission and the abundance constraints, is required. We present a composite grain model, which is made up of a host silicate…

Solar and Stellar Astrophysics · Physics 2013-10-02 Nisha Katyal , Ranjan Gupta , D. B. Vaidya

Three-dimensional (3D) kinetic maps of the Milky Way interstellar medium are an essential tool in studies of its structure and of star formation. We aim to assign radial velocities to Galactic interstellar clouds now spatially localized…

Astrophysics of Galaxies · Physics 2023-09-13 Q. Duchêne , C. Hottier , R. Lallement , J. L. Vergely , C. Babusiaux , A. Marchal , F. Arenou

Interstellar absorption in the galactic plane is highly variable from one direction to another. In this paper colour excesses and distances from a new open cluster sample are used to investigate the spatial distribution of the interstellar…

Astrophysics · Physics 2007-05-23 Bing Chen , Jean Luc Vergely , Bernard Valette , Giovanni Carraro

Accurate astrometric and photometric measurements from Gaia have led to the construction of 3D dust extinction maps which can now be used for estimating the integrated extinctions of Galactic sources located within 5 kpc. These maps based…

Solar and Stellar Astrophysics · Physics 2024-10-15 Snehalata Sahu , Pier-Emmanuel Tremblay , Rosine Lallement , Seth Redfield , Boris T. Gaensicke

Extinction in galaxies affects their observed properties. In scenarios describing the distribution of dust and stars in individual disk galaxies, the amplitude of the extinction can be modulated by the inclination of the galaxies. In this…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-14 Ching-Wa Yip , Alex Szalay , Rosemary Wyse , Laszlo Dobos , Tamas Budavari , Istvan Csabai

We present a novel methodology for mapping dust extinction in nearby galaxies at parsec-scale resolution. We apply it to HST 68 fields within the Small and Large Magellanic Clouds (23 fields in the SMC and 45 fields in the LMC) using…

We present three 14400 square degree relative extinction maps of the Galactic Plane (|b|<20degrees) obtained from 2MASS using accumulative star counts (Wolf diagrams). This method is independent of the colour of the stars and the variation…

Astrophysics · Physics 2009-11-10 D. Froebrich , T. P. Ray , G. C. Murphy , A. Scholz

We present a deep, high-angular resolution 3D dust map of the southern Galactic plane over $239^\circ < \ell < 6^\circ$ and $|b| < 10^\circ$ built on photometry from the DECaPS2 survey, in combination with photometry from VVV, 2MASS, and…

Galactic extinction is tested using galaxy number counts at low Galactic latitude obtained from five band photometry of the Sloan Digital Sky Survey. The spatial variation of galaxy number counts for low extinction regions of $E(B-V) <…

Astrophysics · Physics 2008-11-26 Naoki Yasuda , Masataka Fukugita , Donald P. Schneider

In this paper we explore the relation between dust extinction and stellar light distribution in disks of spiral galaxies. Extinction influences our dynamical and photometric perception of disks, since it can distort our measurement of the…

Astrophysics · Physics 2009-11-11 B. W. Holwerda , R. A. González , P. C. van der Kruit , Ronald J. Allen

Interstellar dust affects astronomical observations through absorption and reddening, yet this extinction is also a powerful tool for studying interstellar matter in galaxies. 3D reconstructions of dust extinction and density in the Milky…

Astrophysics of Galaxies · Physics 2022-03-14 T. E. Dharmawardena , C. A. L. Bailer-Jones , M. Fouesneau , D. Foreman-Mackey

We present a method to estimate and map the two-dimensional distribution of dust extinction in the late-type spiral galaxy NGC 959 from the theoretical and observed flux ratio of optical V and mid-IR (MIR) 3.6 micron images. Our method is…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-14 K. Tamura , R. A. Jansen , R. A. Windhorst

Using a grid of empirically calibrated synthetic spectra developed in our previous study, we construct an all-sky 3D extinction map from the large collection of low-resolution XP spectra in Gaia DR3. Along each line of sight, with an area…

Astrophysics of Galaxies · Physics 2024-09-27 Deokkeun An , Timothy C. Beers , Anirudh Chiti

Aims: Mapping the interstellar medium in 3D provides a wealth of insights into its inner working. The Milky Way is the only galaxy for which detailed 3D mapping can be achieved in principle. In this paper, we reconstruct the dust density in…

Astrophysics of Galaxies · Physics 2020-08-06 R. H. Leike , M. Glatzle , T. A. Enßlin

Aims. We aim to map the 3D distribution of the interstellar extinction of the Milky Way disk up to distances larger than those probed with the Gaia parallax alone. Methods. We apply the FEDReD (Field Extinction-Distance Relation…

Astrophysics of Galaxies · Physics 2020-09-16 C. Hottier , C. Babusiaux , F. Arenou

Galaxies behind the Milky Way suffer size reduction and dimming due to their obscuration by dust in the disk of our Galaxy. The degree of obscuration is wavelength dependent. It decreases towards longer wavelengths. Compared to the optical,…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-14 Ihab F. Riad , Renée C. Kraan-Korteweg , Patrick A. Woudt

We map the dust distribution in the central 180" (~680 pc) region of the M31 bulge, based on HST/WFC3 and ACS observations in ten bands from near-ultraviolet (2700 A) to near-infrared (1.5 micron). This large wavelength coverage gives us…

Astrophysics of Galaxies · Physics 2016-04-20 Hui Dong , Zhiyuan Li , Q. D. Wang , Tod R. Lauer , Knut A. G. Olsen , Abhijit Saha , Julianne J. Dalcanton , Brent A. Groves

The three-dimensional extinction and structure are studied for the Taurus, Orion, Perseus and California molecular clouds based on the LAMOST spectroscopy. Stellar color excess is calculated with the intrinsic color index derived from the…

Solar and Stellar Astrophysics · Physics 2023-03-29 Zhetai Cao , Biwei Jiang , He Zhao , Mingxu Sun

Near-infrared spectroscopy from APOGEE and wide-field optical photometry from Pan-STARRS1 have recently made possible precise measurements of the shape of the extinction curve for tens of thousands of stars, parameterized by R(V). These…

Astrophysics of Galaxies · Physics 2017-03-29 E. F. Schlafly , J. E. G. Peek , D. P. Finkbeiner , G. M. Green

This review describes our current understanding of interstellar extinction. This differ substantially from the ideas of the 20th century. With infrared surveys of hundreds of millions of stars over the entire sky, such as 2MASS,…

Astrophysics of Galaxies · Physics 2017-06-13 George Gontcharov