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We study the integral Galactic extinction and reddening based on the galaxy catalog of the South Galactic Cap U-band Sky Survey (SCUSS), where $u$ band galaxy number counts and $u-r$ color distribution are used to derive the Galactic…

Dust extinction can be determined from the number of distant field galaxies seen through a spiral disk. To calibrate this number for the crowding and confusion introduced by the foreground image, Gonzalez et al.(1998) and Holwerda et al.…

天体物理学 · 物理学 2009-11-10 B. W. Holwerda , R. A. Gonzalez , Ronald J. Allen , P. C. van der Kruit

The principle of the background-eliminated extinction-parallax (BEEP) method is examining the extinction difference between on- and off-cloud regions to reveal the extinction jump caused by molecular clouds, thereby revealing the distance…

星系天体物理 · 物理学 2021-11-24 Qing-Zeng Yan , Ji Yang , Yang Su , Yan Sun , Ye Xu , Hongchi Wang , Xin Zhou , Chen Wang

CONTEXT. The Gaia Collaboration has used Gaia-DR2 sources with six-dimensional (6D) phase space information to derive kinematical maps within 5 kpc of the Sun, which is a reachable range for stars with relative error in distance lower than…

星系天体物理 · 物理学 2019-01-09 M. Lopez-Corredoira , F. Sylos Labini

Aims: Our aim is to provide an observational view of the old Disc structure of the Milky Way galaxy using the distribution of red clump stars. The spiral arms, warp structure, and other asymmetries present in the Disc are re-visited using a…

星系天体物理 · 物理学 2023-05-17 Namita Uppal , Shashikiran Ganesh , Mathias Schultheis

We have derived far-ultraviolet extinction curves for stars in the Galaxy, LMC, and SMC, from spectra of pairs of stars observed with the FUSE satellite, matched in spectral type and with different amounts of reddening. The stars were…

天体物理学 · 物理学 2007-05-23 J. B. Hutchings , J. Giasson

We have used optical images acquired with the Hubble Space Telescope to construct the first high-resolution extinction map in the direction of Terzan 5, a peculiar stellar system in the inner bulge of our Galaxy. The map has a spatial…

We present a new technique based on multi-band near ultraviolet and optical photometry to measure both the stellar intrinsic properties, ie luminosity and effective temperature, and the interstellar dust extinction along the line of sight…

天体物理学 · 物理学 2009-11-07 Martino Romaniello , Nino Panagia , Salvatore Scuderi , Robert P. Kirshner

We present detailed maps of the microlensing optical depth and event density over an area of 195 sq. deg towards the Galactic bulge. The maps are computed from synthetic stellar catalogues generated from the Besancon Galaxy Model, which…

天体物理学 · 物理学 2015-05-13 E. Kerins , A. C. Robin , D. J. Marshall

We used optical images acquired with the UVIS channel of the Wide Field Camera 3 on board of the Hubble Space Telescope to construct the first high-resolution extinction map in the direction of NGC 6440, a globular cluster located in the…

太阳与恒星天体物理 · 物理学 2019-09-25 Cristina Pallanca , Francesco R. Ferraro , Barbara Lanzoni , Sara Saracino , Silvia Raso , Paola Focardi

We report the results of a near-infrared survey for long-period variables in a field of view of 20 arcmin by 30 arcmin towards the Galactic Centre (GC). We have detected 1364 variables, of which 348 are identified with those reported in…

Photoelectric magnitudes and color indices in the Vilnius seven-color system for 152 stars are used to investigate the interstellar extinction in the area of the Aries molecular cloud MBM 12, coinciding with the L1454 and L1457 dust clouds.…

天体物理学 · 物理学 2007-05-23 V. Straizys , K. Cernis , A. Kazlauskas , V. Laugalys

The early third data release (EDR3) of the European Space Agency satellite Gaia provides coordinates, parallaxes, and proper motions for ~1.47 billion sources in our Milky Way, based on 34 months of observations. The combination of Gaia DR2…

星系天体物理 · 物理学 2021-03-17 Tommaso Marchetti

We present a new dust extinction technique with which we are able to retrieve parsec-scale gas surface density maps for entire nearby galaxies. The method measures the dust attenuation in optical bands on a pixel-by-pixel basis against a…

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,…

星系天体物理 · 物理学 2017-06-13 George Gontcharov

Although interstellar dust extinction serves as a powerful distance estimator, the solar system's location within the Galactic plane complicates distance determinations, especially for molecular clouds (MCs) at varying distances along the…

星系天体物理 · 物理学 2025-08-22 Shiyu Zhang , Yang Su , Xuepeng Chen , Min Fang , Fujun Du , Shaobo Zhang , Qing-Zeng Yan , Xin Liu , Miaomiao Zhang , Yan Sun , Ji Yang

We use deep $8\:\mu m$ Spitzer-IRAC imaging of a massive Infrared Dark Cloud (IRDC) G028.37+00.07 to construct a Mid-Infrared (MIR) extinction map that probes mass surface densities up to $\Sigma\:\sim 1\:\rm{g~cm^{-2}}$…

太阳与恒星天体物理 · 物理学 2015-06-18 Michael J. Butler , Jonathan C. Tan , Jouni Kainulainen

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…

We combine high-resolution spectroscopic data from APOGEE-2 Survey Data Release 16 (DR16) with broad-band photometric data from several sources, as well as parallaxes from {\it Gaia} Data Release 2 (DR2). Using the Bayesian…

We have created new dust temperature and column density maps of Perseus, Ophiuchus and Serpens using 60 and 100 micron data from the IRIS recalibration of IRAS data. We describe an optimized method for finding the dust temperature,…

天体物理学 · 物理学 2009-11-13 Scott L. Schnee , Naomi A. Ridge , Alyssa A. Goodman , Jason G. Li