Showing 2007 · astro-phShow all

132 papers · 2 filters

astro-ph2007★ 44 cited

SHARC-II 350 micron Observations of Thermal Emission from Warm Dust in z>=5 Quasars

Ran Wang, Jeff Wagg, Chris L. Carilli +10

We present observations of four z>= SDSS quasars at 350 micron with the SHARC-II bolometer camera on the Caltech Submillimeter Observatory. These are among the deepest observations…

astro-ph2007★ 118 cited

Simultaneous Chandra, CSO and VLA Observations of Sgr A*: The Nature of Flaring Activity

F. Yusef-Zadeh, M. Wardle, C. Heinke +4

Sgr A*, the massive black hole at the center of the Galaxy, varies in radio through X-ray emission on hourly time scales. The flare activity is thought to arise from the innermost…

astro-ph2007★ 218 cited

An X-ray, IR, and Submillimeter Flare of Sagittarius A*

D. P. Marrone, F. K. Baganoff, M. R. Morris +14

Energetic flares are observed in the Galactic supermassive black hole Sagittarius A* from radio to X-ray wavelengths. On a few occasions, simultaneous flares have been detected in…

astro-ph2007★ 117 cited

Spitzer IRS Observations of Class I/II Objects in Taurus: Composition and Thermal History of the Circumstellar Ices

G. Zasowski, F. Kemper, Dan M. Watson +4

We present observations of Taurus-Auriga Class I/II protostars obtained with the Spitzer InfraRed Spectrograph. Detailed spectral fits to the 6 and 15 micron features are made, usi…

astro-ph2007★ 216 cited

Vigorous star formation with low efficiency in massive disk galaxies at z=1.5

E. Daddi, H. Dannerbauer, D. Elbaz +4

We present the first detection of molecular gas cooling CO emission lines from ordinary massive galaxies at z=1.5. Two sources were observed with the IRAM Plateau de Bure Interfero…

astro-ph2007★ 90 cited

SANEPIC: A Map-Making Method for Timestream Data From Large Arrays

G. Patanchon, P. A. R. Ade, J. J. Bock +23

We describe a map-making method which we have developed for the Balloon-borne Large Aperture Submillimeter Telescope (BLAST) experiment, but which should have general application t…

astro-ph2007★ 47 cited

The Balloon-borne Large Aperture Submillimeter Telescope (BLAST) 2005: A 4 sq. deg Galactic Plane Survey in Vulpecula (l=59)

E. L. Chapin, P. A. R. Ade, J. J. Bock +24

We present the first results from a new 250, 350, and 500 micron Galactic Plane survey taken with the Balloon-borne Large-Aperture Submillimeter Telescope (BLAST) in 2005. This sur…

astro-ph2007★ 31 cited

Far-infrared polarimetry from the Stratospheric Observatory for Infrared Astronomy

J. E. Vaillancourt, D. T. Chuss, R. M. Crutcher +8

Multi-wavelength imaging polarimetry at far-infrared wavelengths has proven to be an excellent tool for studying the physical properties of dust, molecular clouds, and magnetic fie…

astro-ph2007★ 43 cited

Galaxy Cluster Correlation Function to z ~ 1.5 in the IRAC Shallow Cluster Survey

M. Brodwin, A. H. Gonzalez, L. A. Moustakas +4

We present the galaxy cluster autocorrelation function of 277 galaxy cluster candidates with 0.25 \le z \le 1.5 in a 7 deg^2 area of the IRAC Shallow Cluster Survey. We find strong…

astro-ph2007★ 119 cited

Near-Infrared Mapping and Physical Properties of the Dwarf-Planet Ceres

Benoit Carry, Christophe Dumas, Marcello Fulchignoni +5

We study the physical characteristics (shape, dimensions, spin axis direction, albedo maps, mineralogy) of the dwarf-planet Ceres based on high-angular resolution near-infrared obs…

astro-ph2007★ 337 cited

The Great Observatories Origins Deep Survey. VLT/FORS2 Spectroscopy in the GOODS-South Field: Part III

E. Vanzella, S. Cristiani, M. Dickinson +15

Aims. We present the full data set of the spectroscopic campaign of the ESO/GOODS program in the GOODS-South field, obtained with the FORS2 spectrograph at the ESO/VLT. Method. Obj…

astro-ph2007★ 148 cited

The Balloon-borne Large Aperture Submillimeter Telescope: BLAST

E. Pascale, P. A. R. Ade, J. J. Bock +27

The Balloon-borne Large Aperture Submillimeter Telescope (BLAST) is a sub-orbital surveying experiment designed to study the evolutionary history and processes of star formation in…

astro-ph2007★ 57 cited

The VSOP 5 GHz Active Galactic Nucleus Survey: V. Imaging Results for the Remaining 140 sources

R. Dodson, E. B. Fomalont, K. Wiik +21

In February 1997, the Japanese radio astronomy satellite HALCA was launched to provide the space-bourne element for the VLBI Space Observatory Programme (VSOP) mission. Approximate…

astro-ph2007★ 20 cited

SuperNova Acceleration Probe (SNAP): Investigating Photometric Redshift Optimization

Tomas Dahlen, Bahram Mobasher, Stephanie Jouvel +5

The aim of this paper is to investigate ways to optimize the accuracy of photometric redshifts for a SNAP like mission. We focus on how the accuracy of the photometric redshifts de…

astro-ph2007★ 297 cited

Debris disks around Sun-like stars

D. E. Trilling, G. Bryden, C. A. Beichman +7

We have observed nearly 200 FGK stars at 24 and 70 microns with the Spitzer Space Telescope. We identify excess infrared emission, including a number of cases where the observed fl…

astro-ph2007★ 14 cited

Spitzer IRS mapping of the central kpc of Centaurus A

Alice C. Quillen, Joss Bland-Hawthorn, Joel Green +6

We report on the results of infrared spectroscopic mapping observations carried out in the nuclear region of Centaurus A (NGC5128). The 500 pc bipolar dust shell discovered by Quil…

astro-ph2007★ 19 cited

A Comparison of Weak Lensing Measurements From Ground- and Space-Based Facilities

Mansi M. Kasliwal, Richard Massey, Richard S. Ellis +2

We assess the relative merits of weak lensing surveys, using overlapping imaging data from the ground-based Subaru telescope and the Hubble Space Telescope (HST). Our tests complem…

astro-ph2007★ 26 cited

The orbits of the quadruple star system 88 Tau A from PHASES differential astrometry and radial velocity

Benjamin F. Lane, Matthew W. Muterspaugh, Francis C. Fekel +7

We have used high precision differential astrometry from the Palomar High-precision Astrometric Search for Exoplanet Systems (PHASES) project and radial velocity measurements cover…

astro-ph2007★ 56 cited

Masses, Luminosities, and Orbital Coplanarities of the mu Orionis Quadruple Star System from PHASES Differential Astrometry

Matthew W. Muterspaugh, Benjamin F. Lane, Francis C. Fekel +6

mu Orionis was identified by spectroscopic studies as a quadruple star system. Seventeen high precision differential astrometry measurements of mu Ori have been collected by the Pa…

astro-ph2007★ 21 cited

The scalar perturbation spectral index n_s: WMAP sensitivity to unresolved point sources

K. M. Huffenberger, H. K. Eriksen, F. K. Hansen +2

Precision measurement of the scalar perturbation spectral index, n_s, from the Wilkinson Microwave Anisotropy Probe temperature angular power spectrum requires the subtraction of u…

astro-ph2007★ 7 cited

A Search for 6.7 GHz Methanol Masers in M33

P. F. Goldsmith, J. D. Pandian, A. A. Deshpande

We report the negative results from a search for 6.7 GHz methanol masers in the nearby spiral galaxy M33. We observed 14 GMCs in the central 4 kpc of the Galaxy, and found 3 sigma…

astro-ph2007★ 84 cited

Super-resolving distant galaxies with gravitational telescopes: Keck-LGSAO and Hubble imaging of the lens system SDSSJ0737+3216

P. J. Marshall, T. Treu, J. Melbourne +13

We combine high-resolution images in four optical/infra-red bands, obtained with the laser guide star adaptive optics system on the Keck Telescope and with the Hubble Space Telesco…

astro-ph2007★ 72 cited

Highly Collimated Jets and Wide-Angle Outflows in HH46/47: New Evidence from Spitzer IR Images

T. Velusamy, W. D. Langer, K. A. Marsh

We present new details of the structure and morphology of the jets and outflows in HH46/47 as seen in Spitzer infrared images from IRAC and MIPS, reprocessed using the ``HiRes'' de…

astro-ph2007★ 36 cited

Spider Optimization: Probing the Systematics of a Large Scale B-Mode Experiment

C. J. MacTavish, P. A. R. Ade, E. S. Battistelli +31

Spider is a long-duration, balloon-borne polarimeter designed to measure large scale Cosmic Microwave Background (CMB) polarization with very high sensitivity and control of system…