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Foreground emission and scattered light from interplanetary dust (IPD) particles and emission from Galactic stellar sources are the greatest obstacles for determining the cosmic infrared background (CIB) from diffuse sky measurements in the…

天体物理学 · 物理学 2007-05-23 E. Dwek , R. G. Arendt

Infrared photometry in the J (1.2 microns), H (1.7 microns), Ks (2.2 microns) bands from the 2MASS catalogue and in the W1 (3.4 microns), W2 (4.6 microns), W3 (12 microns), W4 (22 microns) bands from the WISE catalogue is used to reveal the…

星系天体物理 · 物理学 2019-10-25 George Gontcharov

We present a new set of high resolution dust extinction maps of the nearby and essentially starless Pipe Nebula molecular cloud. The maps were constructed from a concerted deep near-infrared imaging survey with the ESO-VLT, ESO-NTT, CAHA…

星系天体物理 · 物理学 2010-12-23 Carlos Gerardo Román-Zúñiga , João F. Alves , Charles J. Lada , Marco Lombardi

Four young star clusters were studied in order to characterize their anomalous extinction or variable reddening that could be due to a possible contamination by dense clouds or circumstellar effects. The extinction law (Rv) was evaluated by…

太阳与恒星天体物理 · 物理学 2015-06-04 B. Fernandes , J. Gregorio-Hetem , A. Hetem

Aims: We used 12,530 photometrically-selected blue horizontal branch (BHB) stars from the Sloan Digital Sky Survey (SDSS) to estimate the total extinction of the Milky Way at the high Galactic latitudes, $R_V$ and $A_V$ in each line of…

星系天体物理 · 物理学 2015-06-17 Hai-Jun Tian , Chao Liu , Jing-Yao Hu , Yang Xu , Xue-Lei Chen

We present dynamical distance estimates for 15 Galactic globular clusters and use these to check the consistency of dynamical and photometric distance estimates. For most of the clusters, this is the first dynamical distance estimate ever…

星系天体物理 · 物理学 2015-10-28 Laura L. Watkins , Roeland P. van der Marel , Andrea Bellini , Jay Anderson

High-resolution Hubble Space Telescope (\textit{HST}) optical observations have been used to perform the deepest photometric study of the poorly studied Galactic globular cluster NGC 6284. The deep colour-magnitude diagram (CMD) that we…

When observing astronomical objects, we must deal with extinction (i.e. the absorption and scattering of the emitted radiation by dust and gas between the source and the observer). Interstellar extinction depends on the location of the…

太阳与恒星天体物理 · 物理学 2024-08-01 E. Paunzen , M. Netopil , M. Prisegen , N. Faltova

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…

星系天体物理 · 物理学 2020-08-06 R. H. Leike , M. Glatzle , T. A. Enßlin

Gaia DR1 Tycho-Gaia Astrometric Solution parallaxes, Tycho-2 photometry and reddening/extinction estimates from nine data sources for 38074 giants within 415 pc from the Sun are used to compare their position in the Hertzsprung-Russell…

星系天体物理 · 物理学 2019-10-25 George A. Gontcharov , Aleksandr V. Mosenkov

Using the correlation between the equivalent width of the diffuse interstellar band (DIB) at 8620 A and the interstellar reddening reported by Munari (2000) GAIA could directly trace the interstellar extinction throughout the Galaxy. We…

天体物理学 · 物理学 2007-05-23 S. Vidrih , T. Zwitter

We analyse an all-sky compilation of thirteen data sources with optical interstellar linear polarisation for 3871 {\it Gaia} DR2 and {\it Hipparcos} stars within 500 pc, which do not exhibit a considerable intrinsic polarisation. These data…

星系天体物理 · 物理学 2019-10-25 George A. Gontcharov , Aleksandr V. Mosenkov

Magnitude-limited samples of spiral galaxies drawn from the Ursa Major and Pisces clusters are used to determine their extinction properties as a function of inclination. Imaging photometry is available for 87 spirals in B,R,I and K' bands.…

天体物理学 · 物理学 2009-10-30 R. Brent Tully , M. J. Pierce , J. S. Huang , W. Saunders , M. A. W. Verheijen , P. L. Witchalls

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…

天体物理学 · 物理学 2009-10-31 Hector G. Arce , Alyssa A. Goodman

DENIS observations in the J (1.2 micron) and K_S (2.15 micron) bands together with isochrones calculated for the RGB and AGB phase are used to draw an extinction map of the inner Galactic Bulge. The uncertainty in this method is mainly…

天体物理学 · 物理学 2007-05-23 M. Schultheis , S. Ganesh , G. Simon , A. Omont , C. Alard , J. Borsenberger , E. Copet , N. Epchtein , P. Fouque , H. Habing

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 have analized a sample of 327 clusters of galaxies spanning the range 0.06-0.70 in redshift. Strong constraints on their mean intracluster emission by dust have been obtained using maps and catalogs from the HERSCHEL HerMES project;…

星系天体物理 · 物理学 2017-01-25 C. M. Gutierrez , M. Lopez-Corredoira

We report the discovery of a probable new globular cluster in the disk of the Milky Way. Visible in 2MASS and the GLIMPSE survey, it has an estimated foreground extinction of A_V ~ 24 mag. The absolute magnitude of the cluster and the…

天体物理学 · 物理学 2009-11-13 Jay Strader , Henry A. Kobulnicky

A new optical reddening model for the Solar neighborhood is presented. The model makes use of the large-scale properties of the dust layer in the Galaxy, and of the observed clumpiness in its distribution, and it is used to compute…

天体物理学 · 物理学 2011-05-23 R. A. Mendez , W. F. van Altena

We present an analysis of the dust optical properties at large scale, for the whole galactic anticenter hemisphere. We used the 2MASS Extended Source Catalog to obtain the total reddening on each galaxy line of sight and we compared this…

天体物理学 · 物理学 2009-10-19 L. Cambresy , T. H. Jarrett , C. A. Beichman