Search Publications
Solar Influences on Climate
Beer, J.; Lockwood, M.; Gray, L. J. +12 more
Understanding the influence of solar variability on the Earth's climate requires knowledge of solar variability, solar-terrestrial interactions, and the mechanisms determining the response of the Earth's climate system. We provide a summary of our current understanding in each of these three areas. Observations and mechanisms for the Sun's variabi…
A study of the gas-star formation relation over cosmic time
Lutz, D.; Förster Schreiber, N. M.; Genzel, R. +19 more
We use the first systematic data sets of CO molecular line emission in z ~ 1-3 normal star-forming galaxies (SFGs) for a comparison of the dependence of galaxy-averaged star formation rates on molecular gas masses at low and high redshifts, and in different galactic environments. Although the current high-z samples are still small and biased towar…
The universal galaxy cluster pressure profile from a representative sample of nearby systems (REXCESS) and the YSZ - M500 relation
Böhringer, H.; Arnaud, M.; Pointecouteau, E. +3 more
We investigate the regularity of cluster pressure profiles with REXCESS, a representative sample of 33 local (z < 0.2) clusters drawn from the REFLEX catalogue and observed with XMM-Newton. The sample spans a mass range of 1014 M⊙ < M500 < 1015 M⊙, where M500 is the mass co…
Very High Gas Fractions and Extended Gas Reservoirs in z = 1.5 Disk Galaxies
Daddi, E.; Elbaz, D.; Stern, D. +10 more
We present evidence for very high gas fractions and extended molecular gas reservoirs in normal, near-infrared-selected (BzK) galaxies at z ~ 1.5. Our results are based on multi-configuration CO[2-1] observations obtained at the IRAM Plateau de Bure Interferometer. All six star-forming galaxies observed were detected at high significance. High spa…
Astrometry.net: Blind Astrometric Calibration of Arbitrary Astronomical Images
Hogg, David W.; Lang, Dustin; Blanton, Michael +2 more
We have built a reliable and robust system that takes as input an astronomical image, and returns as output the pointing, scale, and orientation of that image (the astrometric calibration or World Coordinate System information). The system requires no first guess, and works with the information in the image pixels alone; that is, the problem is a …
Near-Earth Interplanetary Coronal Mass Ejections During Solar Cycle 23 (1996 - 2009): Catalog and Summary of Properties
Cane, H. V.; Richardson, I. G.
In a previous study (Cane and Richardson, J. Geophys. Res.108(A4), SSH6-1, 2003), we investigated the occurrence of interplanetary coronal mass ejections in the near-Earth solar wind during 1996 - 2002, corresponding to the increasing and maximum phases of solar cycle 23, and provided a "comprehensive" catalog of these events. In this paper, we pr…
Clouds, filaments, and protostars: The Herschel Hi-GAL Milky Way
Sturm, E.; Miville-Deschênes, M. -A.; Boulanger, F. +121 more
We present the first results from the science demonstration phase for the Hi-GAL survey, the Herschel key program that will map the inner Galactic plane of the Milky Way in 5 bands. We outline our data reduction strategy and present some science highlights on the two observed 2° × 2° tiles approximately centered at l = 30° and l = 59°. The two reg…
Galaxy Stellar Mass Assembly Between 0.2 < z < 2 from the S-COSMOS Survey
Kneib, J. -P.; Aussel, H.; Le Floc'h, E. +22 more
We follow the galaxy stellar mass assembly by morphological and spectral type in the COSMOS 2 deg2 field. We derive the stellar mass functions and stellar mass densities from z = 2 to z = 0.2 using 196,000 galaxies selected at F 3.6 µm > 1 µJy with accurate photometric redshifts (σ_{(z_phot-z_spec)/(1+z_spec)}=…
An absolutely calibrated Teff scale from the infrared flux method. Dwarfs and subgiants
Asplund, M.; Casagrande, L.; Meléndez, J. +2 more
Various effective temperature scales have been proposed over the years. Despite much work and the high internal precision usually achieved, systematic differences of order 100 K (or more) among various scales are still present. We present an investigation based on the infrared flux method aimed at assessing the source of such discrepancies and pin…
Evidence for ultra-fast outflows in radio-quiet AGNs. I. Detection and statistical incidence of Fe K-shell absorption lines
Cappi, M.; Dadina, M.; Tombesi, F. +4 more
Context. Blue-shifted Fe K absorption lines have been detected in recent years between 7 and 10 keV in the X-ray spectra of several radio-quiet AGNs. The derived blue-shifted velocities of the lines can often reach mildly relativistic values, up to 0.2-0.4c. These findings are important because they suggest the presence of a previously unknown mas…