Science Archives Publication System

The All-Wavelength Extended Groth Strip International Survey (AEGIS) Data Sets

DOI: 10.1086/517931 Bibcode: 2007ApJ...660L...1D

Smail, I.; Le Floc'h, E.; Barmby, P. +53 more

In this the first of a series of Letters, we present a panchromatic data set in the Extended Groth Strip region of the sky. Our survey, the All-Wavelength Extended Groth Strip International Survey (AEGIS), aims to study the physical properties and evolutionary processes of galaxies at z~1. It includes the following deep, wide-field imaging data se…

2007 • The Astrophysical Journal

eHST 534

An XMM-Newton survey of broad iron lines in Seyfert galaxies

DOI: 10.1111/j.1365-2966.2007.12331.x Bibcode: 2007MNRAS.382..194N

Nandra, K.; Reeves, J. N.; George, I. M. +1 more

We present an analysis of the X-ray spectra of a sample of 37 observations of 26 Seyfert galaxies observed by XMM-Newton in order to characterize their iron Kα emission. All objects show evidence for iron line emission in the 6-7 keV band. A narrow `core' at 6.4 keV is seen almost universally in the spectra, and we model this using a neutral Compt…

2007 • Monthly Notices of the Royal Astronomical Society

XMM-Newton 516

The SAURON project - X. The orbital anisotropy of elliptical and lenticular galaxies: revisiting the (V/σ, ɛ) diagram with integral-field stellar kinematics

DOI: 10.1111/j.1365-2966.2007.11963.x Bibcode: 2007MNRAS.379..418C

Krajnović, Davor; Emsellem, Eric; van de Ven, Glenn +11 more

We analyse the orbital distribution of elliptical (E) and lenticular (S0) galaxies using SAURON integral-field stellar kinematics within about one effective (half-light) radius. We construct the anisotropy diagram, which relates the ratio of the ordered and random motion in a galaxy (V/σ) to its observed ellipticity (ɛ), for the 48 E/S0 galaxies f…

2007 • Monthly Notices of the Royal Astronomical Society

eHST 514

Star Formation in NGC 5194 (M51a). II. The Spatially Resolved Star Formation Law

DOI: 10.1086/522300 Bibcode: 2007ApJ...671..333K

Gordon, Karl D.; Bot, Caroline; Calzetti, Daniela +20 more

We have studied the relationship between the star formation rate (SFR), surface density, and gas surface density in the spiral galaxy M51a (NGC 5194), using multiwavelength data obtained as part of the Spitzer Infrared Nearby Galaxies Survey (SINGS). We introduce a new SFR index based on a linear combination of Hα emission-line and 24 µm con…

2007 • The Astrophysical Journal

eHST 508

The Process of Tholin Formation in Titan’s Upper Atmosphere

DOI: 10.1126/science.1139727 Bibcode: 2007Sci...316..870W

Coates, A. J.; Young, D. T.; Waite, J. H. +4 more

Titan’s lower atmosphere has long been known to harbor organic aerosols (tholins) presumed to have been formed from simple molecules, such as methane and nitrogen (CH₄ and N₂). Up to now, it has been assumed that tholins were formed at altitudes of several hundred kilometers by processes as yet unobserved. Using measurements …

2007 • Science

Cassini 501

Strong size evolution of the most massive galaxies since z ∼ 2

DOI: 10.1111/j.1365-2966.2007.12388.x Bibcode: 2007MNRAS.382..109T

Cooper, M. C.; Ellis, Richard S.; Trujillo, Ignacio +3 more

Using the combined capabilities of the large near-infrared Palomar/DEEP-2 survey, and the superb resolution of the Advanced Camera for Surveys HST camera, we explore the size evolution of 831 very massive galaxies (M_⋆≥ 10¹¹h^-2₇₀ M_⊙) since z~ 2. We split our sample according to their light conc…

2007 • Monthly Notices of the Royal Astronomical Society

eHST 477

Radio Loudness of Active Galactic Nuclei: Observational Facts and Theoretical Implications

DOI: 10.1086/511972 Bibcode: 2007ApJ...658..815S

Stawarz, Łukasz; Sikora, Marek; Lasota, Jean-Pierre

We investigate how the total radio luminosity of AGN-powered radio sources depends on their accretion luminosity and the central black hole mass. Our studies cover about 7 orders of magnitude in accretion luminosity (expressed in Eddington units, i.e., as Eddington ratios) and the full range of AGN black hole masses. We find that AGNs form two dis…

2007 • The Astrophysical Journal

eHST 472

The ACS Survey of Galactic Globular Clusters. I. Overview and Clusters without Previous Hubble Space Telescope Photometry

DOI: 10.1086/511979 Bibcode: 2007AJ....133.1658S

Anderson, Jay; Dotter, Aaron; Sarajedini, Ata +10 more

We present the first results of a large Advanced Camera for Surveys (ACS) survey of Galactic globular clusters. This Hubble Space Telescope (HST) Treasury project is designed to obtain photometry with S/N (signal-to-noise ratio) gtrsim10 for main-sequence stars with masses gtrsim0.2 M_odot in a sample of globulars using the ACS Wide Fiel…

2007 • The Astronomical Journal

eHST 462

COSMOS: Hubble Space Telescope Observations

DOI: 10.1086/516580 Bibcode: 2007ApJS..172...38S

Kneib, J. -P.; Aussel, H.; Daddi, E. +52 more

The Cosmic Evolution Survey (COSMOS) was initiated with an extensive allocation (590 orbits in Cycles 12-13) using the Hubble Space Telescope (HST) for high-resolution imaging. Here we review the characteristics of the HST imaging with the Advanced Camera for Surveys (ACS) and parallel observations with NICMOS and WFPC2. A square field (1.8 deg

2007 • The Astrophysical Journal Supplement Series

eHST 462

The lakes of Titan

DOI: 10.1038/nature05438 Bibcode: 2007Natur.445...61S

Lorenz, R. D.; Stiles, B.; Kelleher, K. +35 more

The surface of Saturn's haze-shrouded moon Titan has long been proposed to have oceans or lakes, on the basis of the stability of liquid methane at the surface. Initial visible and radar imaging failed to find any evidence of an ocean, although abundant evidence was found that flowing liquids have existed on the surface. Here we provide definitive…

2007 • Nature

Cassini 442