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We present a comparison of the gas and dust properties of the dense interstellar matter in six nearby star-forming regions (d<500 pc): rho Oph, Cha I, R CrA, IC 348, NGC 1333, and Orion. We measure from Chandra and XMM-Newton observations…

The large majority of extinction sight lines in our Galaxy obey a simple relation depending on one parameter, the total-to-selective extinction coefficient, Rv. Different values of Rv are able to match the whole extinction curve through…

Astrophysics of Galaxies · Physics 2015-05-20 Paola Mazzei , Guido Barbaro

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…

We present 1.25 mm continuum data for a southern galaxy sample selected from the IRAS PSC and complete to S_60=2 Jy. Two thirds of the galaxies have been detected and significant limits on the remaining objects have been set. We find, on a…

Astrophysics · Physics 2015-06-24 P. Andreani , A. Franceschini

Dust plays a central role in the unification theory of active galactic nuclei (AGNs). Whether the dust that forms the torus around an AGN is tenth-$\mu$m-sized like interstellar grains or much larger has a profound impact on correcting for…

Astrophysics of Galaxies · Physics 2017-05-10 Z. Z. Shao , B. W. Jiang , Aigen Li

Massive, large scale star counts in the J band provided by the Deep Near Infrared Survey of the Southern Sky (DENIS) are used for the first time to draw out an extinction map of the Chamaeleon I dark cloud. We derived a 2 arcminutes…

Astrophysics · Physics 2007-05-23 L. Cambresy , N. Epchtein , E. Copet , B. de Batz , S. Kimeswenger , T. Le Bertre , D. Rouan , D. Typhene

The position of the Sun inside the Milky Way's disc hampers the study of the spiral arm structure. We aim to analyse the spiral arms along the line-of-sight towards the Galactic centre (GC) to determine their distance, extinction, and…

Astrophysics of Galaxies · Physics 2021-09-08 Francisco Nogueras-Lara , Rainer Schödel , Nadine Neumayer

We report on the detection of reddening toward z ~ 0.2 galaxy clusters. This is measured by correlating the Sloan Digital Sky Survey cluster and quasar catalogs and by comparing the photometric and spectroscopic properties of quasars behind…

Astrophysics · Physics 2009-11-13 Doron Chelouche , Benjamin P. Koester , David V. Bowen

We investigate the connection between dust and gas in the nearby edge-on spiral galaxy NGC 891. High resolution Herschel PACS and SPIRE 70, 100, 160, 250, 350, and 500 $\mu$m images are combined with JCMT SCUBA 850 $\mu$m observations to…

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

We combine VI photometry from OGLE-III with VVV and 2MASS measurements of E(J-K_{s}) to resolve the longstanding problem of the non-standard optical extinction toward the Galactic bulge. We show that the extinction is well-fit by the…

We use the Vista Variables in the Via Lactea (VVV) ESO public survey data to measure extinction values in the complete area of the Galactic bulge covered by the survey at high resolution. We derive reddening values using the method…

Astrophysics of Galaxies · Physics 2015-06-04 O. A. Gonzalez , M. Rejkuba , M. Zoccali , E. Valenti , D. Minniti , M. Schultheis , R. Tobar , B. Chen

We present a near-infrared extinction map of a large region (approximately 2200 deg^2) covering the Orion, the Monoceros R2, the Rosette, and the Canis Major molecular clouds. We used robust and optimal methods to map the dust column…

Astrophysics of Galaxies · Physics 2015-05-28 Marco Lombardi , Joao Alves , Charles lada

We present our catalog of U, B, V, and I stellar photometry of the central 18 sq. degree area of the Small Magellanic Cloud. We combine our data with the 2MASS and DENIS catalogs to provide, when available, U through K_S data for stars.…

Astrophysics · Physics 2011-07-18 Dennis Zaritsky , Jason Harris , Ian B. Thompson , Eva K. Grebel , Philip Massey

Recent disk observations have revealed multiple indirect signatures of forming gas giant planets, but high-contrast imaging has rarely confirmed the presence of the suspected perturbers. Here, we exploit a unique opportunity provided by the…

Earth and Planetary Astrophysics · Physics 2025-10-01 G. Cugno , S. Facchini , F. Alarcon , J. Bae , M. Benisty , A. -C. Eilers , G. C. K. Leung , M. Meyer , L. Pueyo , R. Teague , E. Bergin , J. Girard , R. Helled , J. Huang , J. Leisenring

The DENIS 2 micron survey is described. It's ability to probe galaxies at very low galactic latitudes is computed using simulated images. This analysis indicates that DENIS will be able to separate galaxies from stars, right through the…

Astrophysics · Physics 2007-05-23 Gary A. Mamon

We have pursued two different methods to analyze the old stellar population near the Galactic plane, using data from the 2MASS survey. The first method is based on the isolation of the red clump giant population in the color-magnitude…

Astrophysics · Physics 2009-11-07 M. Lopez-Corredoira , A. Cabrera-Lavers , F. Garzon , P. L. Hammersley

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.…

Astrophysics · Physics 2007-05-23 V. Straizys , K. Cernis , A. Kazlauskas , V. Laugalys

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

We present a study of the detailed distribution of extinction in a region of the Taurus dark cloud complex. Our study uses new BVR images of the region, spectral classification data for 95 stars, and IRAS Sky Survey Atlas (ISSA) 60 and 100…

Astrophysics · Physics 2009-10-31 Hector G. Arce , Alyssa A. Goodman
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