Search Publications
A Gaia-PS1-SDSS (GPS1) Proper Motion Catalog Covering 3/4 of the Sky
Goldman, Bertrand; Tian, Hai-Jun; Rix, Hans-Walter +7 more
We combine Gaia DR1, PS1, Sloan Digital Sky Survey (SDSS), and 2MASS astrometry to measure proper motions for 350 million sources across three-fourths of the sky down to a magnitude of {m}r∼ 20. Using positions of galaxies from PS1, we build a common reference frame for the multi-epoch PS1, single-epoch SDSS and 2MASS data, and calibrat…
The Herschel-ATLAS Data Release 2, Paper I. Submillimeter and Far-infrared Images of the South and North Galactic Poles: The Largest Herschel Survey of the Extragalactic Sky
Smith, Matthew W. L.; Dunne, Loretta; Viaene, Sébastien +11 more
We present the largest submillimeter images that have been made of the extragalactic sky. The Herschel Astrophysical Terahertz Large Area Survey (H-ATLAS) is a survey of 660 deg2 with the PACS and SPIRE cameras in five photometric bands: 100, 160, 250, 350, and 500 µm. In this paper we present the images from our two largest field…
Astrochemical Properties of Planck Cold Clumps
Sanhueza, Patricio; Choi, Minho; Di Francesco, James +26 more
We observed 13 Planck cold clumps with the James Clerk Maxwell Telescope/SCUBA-2 and with the Nobeyama 45 m radio telescope. The N2H+ distribution obtained with the Nobeyama telescope is quite similar to SCUBA-2 dust distribution. The 82 GHz HC3N, 82 GHz CCS, and 94 GHz CCS emission are often distributed differentl…
Discerning the Gamma-Ray-emitting Region in the Flat Spectrum Radio Quasars
Zhang, L.; Wang, J. C.; Yang, C. Y. +1 more
A model-dependent method is proposed to determine the location of the γ-ray-emitting region for a given flat spectrum radio quasar (FSRQ). In the model, the extra-relativistic electrons are injected at the base of the jet and non-thermal photons are produced by both synchrotron radiation and inverse-Compton (IC) scattering in the energy dissipatio…
Cross-correlating the γ-ray Sky with Catalogs of Galaxy Clusters
Viel, Matteo; Xia, Jun-Qing; Fornengo, Nicolao +4 more
We report the detection of a cross-correlation signal between Fermi Large Area Telescope diffuse γ-ray maps and catalogs of clusters. In our analysis, we considered three different catalogs: WHL12, redMaPPer, and PlanckSZ. They all show a positive correlation with different amplitudes, related to the average mass of the objects in each catalog, wh…
The Herschel Planetary Nebula Survey (HerPlaNS): A Comprehensive Dusty Photoionization Model of NGC6781
Villaver, Eva; Ueta, Toshiya; Szczerba, Ryszard +9 more
We perform a comprehensive analysis of the planetary nebula (PN) NGC 6781 to investigate the physical conditions of each of its ionized, atomic, and molecular gas and dust components and the object’s evolution, based on panchromatic observational data ranging from UV to radio. Empirical nebular elemental abundances, compared with theoretical predi…
Probing the Outflowing Multiphase Gas ∼1 kpc below the Galactic Center
Hernandez, Svea; Savage, Blair D.; Bland-Hawthorn, Joss +8 more
Comparison of interstellar medium (ISM) absorption in the UV spectrum of LS 4825, a B1 Ib-II star d = 21 ± 5 kpc from the Sun toward l = 1.°67 and b = -6.°63, with ISM absorption toward an aligned foreground star at d < 7.0 ± 1.7 kpc, allows us to isolate and study gas associated with the Milky Way nuclear wind. Spectra from the Space Telescope…
An Optical and Infrared Photometric Study of the Young Open Cluster IC 1805 in the Giant H II Region W4 †
Lim, Beomdu; Park, Byeong-Gon; Nazé, Y. +7 more
We present deep wide-field optical CCD photometry and mid-infrared Spitzer/IRAC and MIPS 24 µm data for about 100,000 stars in the young open cluster IC 1805. The members of IC 1805 were selected from their location in the various color-color and color-magnitude diagrams, and the presence of Hα emission, mid-infrared excess emission, and X-r…
A Far-ultraviolet Fluorescent Molecular Hydrogen Emission Map of the Milky Way Galaxy
Edelstein, Jerry; Jo, Young-Soo; Min, Kyoung-Wook +2 more
We present the far-ultraviolet (FUV) fluorescent molecular hydrogen (H2) emission map of the Milky Way Galaxy obtained with FIMS/SPEAR covering ∼76% of the sky. The extinction-corrected intensity of the fluorescent H2 emission has a strong linear correlation with the well-known tracers of the cold interstellar medium (ISM), i…
An Interactive Multi-instrument Database of Solar Flares
Kosovichev, Alexander G.; Nita, Gelu M.; Sadykov, Viacheslav M. +1 more
Solar flares are complicated physical phenomena that are observable in a broad range of the electromagnetic spectrum, from radio waves to γ-rays. For a more comprehensive understanding of flares, it is necessary to perform a combined multi-wavelength analysis using observations from many satellites and ground-based observatories. For an efficient …