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Related papers: Low-extinction windows in the inner Galactic Bulge

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The composition and properties of interstellar silicate dust are not well understood. In X-rays, interstellar dust can be studied in detail by making use of the fine structure features in the Si K-edge. The features in the Si K-edge offer a…

Astrophysics of Galaxies · Physics 2019-07-10 S. T. Zeegers , E. Costantini , D. Rogantini , C. P. de Vries , H. Mutschke , P. Mohr , F. de Groot , A. G. G. M. Tielens

Using the bright galaxy counts from the 2 Micron All Sky Survey (2MASS) second incremental release, two techniques for probing large-scale structure at distances of ~150 h-1 Mpc are investigated. First, we study the counts from two sets of…

Astrophysics · Physics 2009-11-07 W. J. Frith , G. S. Busswell , R. Fong , N. Metcalfe , T. Shanks

Surface brightness maps at 12 microns, derived from observations with the Infrared Astronomical Satellite (IRAS), are used to estimate the integrated flux at this wavelength from the Galactic bulge as a function of galactic latitude along…

Astrophysics · Physics 2009-10-30 Jay A. Frogel

We present Hubble Space Telescope data of the low-reddening Sagittarius window in the Galactic bulge. The Sagittarius Window Eclipsing Extrasolar Planet Search field (3'x3'), together with three more Advanced Camera for Surveys and eight…

Recent observations have indicated the existence of dust in high-redshift galaxies, however, the dust properties in them are still unknown. Here we present theoretical constraints on dust properties in Lyman break galaxies (LBGs) at z=3 by…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-17 Hidenobu Yajima , Kentaro Nagamine , Robert Thompson , Jun-Hwan Choi

Context: There is still some debate about the presence and the morphological properties of the long bar in the inner Galaxy. Aims: We investigate the morphological properties of the long Galactic bar using the VVV survey extending star…

We present the first results from the BAaDE (Bulge Asymmetries and Dynamic Evolution) survey. Though only a subset of the complete survey ($\sim$2700 out of $\sim$20000 final sources), our data comprise the largest radio kinematic survey to…

Astrophysics of Galaxies · Physics 2018-07-18 A. C. Trapp , R. M. Rich , M. R. Morris , L. O. Sjouwerman , Y. M. Pihlstrom , M. Claussen , M. C. Stroh

We explore the extinction properties of the dust in the distant universe through the afterglows of high-redshifted GRBs based on the "Drude" model which, unlike previous studies, does not require a prior assumption of template extinction…

Astrophysics · Physics 2008-12-18 S. L. Liang , Aigen Li

The purpose of the investigation is to probe the dust properties inside a molecular cloud, how particle grow and how the presence of ice coatings may change the overall shape of the extinction curve. Field stars can be used to probe the…

Astrophysics of Galaxies · Physics 2015-06-03 Sven Olofsson , Göran Olofsson

We determine the extinction curve in the z_l=0.83 lens galaxy of the gravitational lens SBS0909+532 from the wavelength dependence of the flux ratio between the lensed quasar images (z_s=1.38) from 3400 to 9200\AA. It is the first…

Several properties of the M31 disk, namely: opacity, extinction law and gas-to-dust ratio are studied by means of optical and near-infrared photometry of ten globular clusters and galaxies seen through the disk. The individual extinctions…

Cosmology and Nongalactic Astrophysics · Physics 2009-05-19 P. L. Nedialkov , A. T. Valcheva , V. D. Ivanov , L. Vanzi

We present a method for accurately and precisely inferring photometric dust extinction towards stars at mid-to-high Galactic latitudes using probabilistic machine learning to model the colour-magnitude distribution of zero-extinction stars…

Astrophysics of Galaxies · Physics 2025-12-15 Matthew O'Callaghan , Kaisey S. Mandel , Gerry Gilmore

We present preliminary results from the deepest and largest photographic proper-motion survey ever undertaken of the Galactic bulge. Our first-epoch plate material (from 1972-3) goes deep enough (V_lim = 22) to reach below the bulge…

The 9.7$\mu$m interstellar spectral feature, arising from the Si--O stretch of amorphous silicate dust, is the strongest extinction feature in the infrared (IR). In principle, the spectral profile of this feature could allow one to diagnose…

Solar and Stellar Astrophysics · Physics 2018-07-04 Z. Z. Shao , B. W. Jiang , Aigen Li , Jian Gao , Z. P. Lv , J. W. Yao

We have cross-correlated Far Infrared (IRAS) and UV (FOCA) observations of galaxies to construct a sample of FIR selected galaxies with a UV observation at 0.2 microns. The FIR and UV properties of this sample are compared to the mean…

Astrophysics · Physics 2019-08-17 V. Buat , J. Donas , B. Milliard , C. Xu

We measure galaxy structural properties and colour gradients using HST images to trace the evolution of galaxy components. We jointly fit 3D bulge and disk models to 2505 galaxies in GOODS-South across seven bands (bvizYJH) to IAB = 25.5,…

Astrophysics of Galaxies · Physics 2025-10-14 N. Welikala , L. Miller , A. N. Taylor , G. Congedo

We analyse the stellar content of almost 300 deg^2 of the sky close to the Galactic plane by directly comparing the predictions of the SKY model (Cohen 1994,1995; Wainscoat et al. 1992) with star counts taken from the Two Micron Galactic…

Astrophysics · Physics 2009-10-31 P. L. Hammersley , M. Cohen , F. Garzon , T. Mahoney , M. Lopez-Corredoira

Large spectroscopic surveys have enabled in the recent years the computation of three-dimensional interstellar extinction maps thanks to accurate stellar atmospheric parameters and line-of-sight distances. Such maps are complementary to 3D…

We report results of a near--infrared imaging survey of L977, a dark cloud in Cygnus seen in projection against the plane of the Milky Way. We use measurements of the near--infrared color excess and positions of the 1628 brightest stars in…

Astrophysics · Physics 2009-10-30 J. Alves , C. Lada , E. Lada , S. Kenyon , R. Phelps

We make use of SHARDS, an ultra-deep (<26.5AB) galaxy survey that provides optical photo-spectra at resolution R~50, via medium band filters (FWHM~150A). This dataset is combined with ancillary optical and NIR fluxes to constrain the dust…

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