Search Publications
Dust in the Polar Region as a Major Contributor to the Infrared Emission of Active Galactic Nuclei
Hönig, S. F.; Kishimoto, M.; Tristram, K. R. W. +7 more
Dust around active galactic nuclei (AGNs) is distributed over a wide range of spatial scales and can be observed in the infrared (IR). It is generally assumed that the distribution on parsec scales forms a geometrically and optically thick entity in the equatorial plane around the accretion disk and broad-line region—dubbed "dust torus"—that emits…
Spiral Arms in the Asymmetrically Illuminated Disk of MWC 758 and Constraints on Giant Planets
Kuzuhara, M.; Tamura, M.; Ishii, M. +71 more
We present the first near-IR scattered light detection of the transitional disk associated with the Herbig Ae star MWC 758 using data obtained as part of the Strategic Exploration of Exoplanets and Disks with Subaru, and 1.1 µm Hubble Space Telescope/NICMOS data. While submillimeter studies suggested there is a dust-depleted cavity with r = …
Extragalactic Millimeter-wave Point-source Catalog, Number Counts and Statistics from 771 deg2 of the SPT-SZ Survey
Béthermin, M.; Rest, A.; Chapman, S. +54 more
We present a point-source catalog from 771 deg2 of the South Pole Telescope Sunyaev-Zel'dovich survey at 95, 150, and 220 GHz. We detect 1545 sources above 4.5σ significance in at least one band. Based on their relative brightness between survey bands, we classify the sources into two populations, one dominated by synchrotron emission f…
Widespread and Hidden Active Galactic Nuclei in Star-forming Galaxies at Redshift >0.3
Dickinson, Mark; Kartaltepe, Jeyhan S.; Kocevski, Dale D. +23 more
We characterize the incidence of active galactic nuclei (AGNs) in 0.3 < z < 1 star-forming galaxies by applying multi-wavelength AGN diagnostics (X-ray, optical, mid-infrared, radio) to a sample of galaxies selected at 70 µm from the Far-Infrared Deep Extragalactic Legacy survey (FIDEL). Given the depth of FIDEL, we detect "normal" gal…
Early Stages of Cluster Formation: Fragmentation of Massive Dense Cores down to <~ 1000 AU
Fuente, Asunción; Zhang, Qizhou; Palau, Aina +11 more
In order to study the fragmentation of massive dense cores, which constitute the cluster cradles, we observed the continuum at 1.3 mm and the CO (2-1) emission of four massive cores with the Plateau de Bure Interferometer in the most extended configuration. We detected dust condensations down to ~0.3 M ⊙ and separate millimeter sources …
Albedo Properties of Main Belt Asteroids Based on the All-Sky Survey of the Infrared Astronomical Satellite AKARI
Hasegawa, Sunao; Usui, Fumihiko; Ootsubo, Takafumi +5 more
We present an analysis of the albedo properties of main belt asteroids (MBAs) detected by the All-Sky Survey of the infrared astronomical satellite AKARI. The characteristics of 5120 asteroids detected by the survey, including their sizes and albedos, were cataloged in the Asteroid Catalog Using AKARI (AcuA). Size and albedo measurements were base…
Mapping H-band Scattered Light Emission in the Mysterious SR21 Transitional Disk
Henning, Thomas; Terada, Hiroshi; Usuda, Tomonori +50 more
We present the first near infrared (NIR) spatially resolved images of the circumstellar transitional disk around SR21. These images were obtained with the Subaru HiCIAO camera, adaptive optics, and the polarized differential imaging technique. We resolve the disk in scattered light at H-band for stellocentric 0.''1 <= r <= 0.''6 (12 <~ r …
Herschel's "Cold Debris Disks": Background Galaxies or Quiescent Rims of Planetary Systems?
Krivov, A. V.; Eiroa, C.; Löhne, T. +24 more
Infrared excesses associated with debris disk host stars detected so far peak at wavelengths around ~100 µm or shorter. However, 6 out of 31 excess sources studied in the Herschel Open Time Key Programme, DUNES, have been seen to show significant—and in some cases extended—excess emission at 160 µm, which is larger than the 100 µ…
Curved Walls: Grain Growth, Settling, and Composition Patterns in T Tauri Disk Dust Sublimation Fronts
Hernández, J.; Watson, D. M.; Sargent, B. +6 more
The dust sublimation walls of disks around T Tauri stars represent a directly observable cross-section through the disk atmosphere and midplane. Their emission properties can probe the grain size distribution and composition of the innermost regions of the disk, where terrestrial planets form. Here we calculate the inner dust sublimation wall prop…
A Survey of H2O, CO2, and CO Ice Features toward Background Stars and low-mass Young Stellar Objects Using AKARI
Pontoppidan, K. M.; Sakon, I.; Noble, J. A. +2 more
We present near-infrared spectroscopic observations of 19 molecular clouds made using the AKARI satellite, and the data reduction pipeline written to analyze those observations. The 2.5-5 µm spectra of 30 objects—22 field stars behind quiescent molecular clouds and 8 low-mass young stellar objects in cores—were successfully extracted using t…