Search Publications
Validation of the new Hipparcos reduction
van Leeuwen, F.
Context: A new reduction of the astrometric data as produced by the Hipparcos mission has been published, claiming accuracies for nearly all stars brighter than magnitude Hp=8 to be better, by up to a factor 4, than in the original catalogue.
Aims: The new Hipparcos astrometric catalogue is checked for the quality of the data and the consisten…
Star Formation in AEGIS Field Galaxies since z=1.1: The Dominance of Gradually Declining Star Formation, and the Main Sequence of Star-forming Galaxies
Le Floc'h, E.; Barmby, P.; Cooper, M. C. +26 more
We analyze star formation (SF) as a function of stellar mass (M*) and redshift z in the All-Wavelength Extended Groth Strip International Survey. For 2905 field galaxies, complete to 1010(1010.8) Msolar at z<0.7(1), with Keck spectroscopic redshifts out to z=1.1, we compile SF rates (SFRs) from emissi…
The Cosmic Evolution Survey (COSMOS): Overview
Kneib, J. -P.; Aussel, H.; Sanders, D. B. +19 more
The Cosmic Evolution Survey (COSMOS) is designed to probe the correlated evolution of galaxies, star formation, active galactic nuclei (AGNs), and dark matter (DM) with large-scale structure (LSS) over the redshift range z>0.5-6. The survey includes multiwavelength imaging and spectroscopy from X-ray-to-radio wavelengths covering a 2 deg2<…
New Hubble Space Telescope Discoveries of Type Ia Supernovae at z >= 1: Narrowing Constraints on the Early Behavior of Dark Energy
Dickinson, Mark; Ferguson, Henry C.; Casertano, Stefano +18 more
We have discovered 21 new Type Ia supernovae (SNe Ia) with the Hubble Space Telescope (HST) and have used them to trace the history of cosmic expansion over the last 10 billion yr. These objects, which include 13 spectroscopically confirmed SNe Ia at z>=1, were discovered during 14 epochs of reimaging of the GOODS fields North and South over 2 …
The Hinode (Solar-B) Mission: An Overview
Golub, L.; Culhane, J. L.; Yamada, T. +22 more
The Hinode satellite (formerly Solar-B) of the Japan Aerospace Exploration Agency's Institute of Space and Astronautical Science (ISAS/JAXA) was successfully launched in September 2006. As the successor to the Yohkoh mission, it aims to understand how magnetic energy gets transferred from the photosphere to the upper atmosphere and results in expl…
The reversal of the star formation-density relation in the distant universe
Daddi, E.; Elbaz, D.; Popesso, P. +11 more
Aims:We study the relationship between the local environment of galaxies and their star formation rate (SFR) in the Great Observatories Origins Deep Survey, GOODS, at z∼1.
Methods: We use ultradeep imaging at 24 µm with the MIPS camera onboard {Spitzer} to determine the contribution of obscured light to the SFR of galaxies over the redsh…
Galaxy Luminosity Functions to z~1 from DEEP2 and COMBO-17: Implications for Red Galaxy Formation
Im, M.; Cooper, M. C.; Wolf, C. +31 more
The DEEP2 and COMBO-17 surveys are compared to study luminosity functions of red and blue galaxies to z~1. The two surveys have different methods and sensitivities, but nevertheless results agree. After z~1, M*B has dimmed by 1.2-1.3 mag for all colors of galaxies, φ* for blue galaxies has hardly changed, and φ
The EUV Imaging Spectrometer for Hinode
Young, P. R.; Simnett, G. M.; Culhane, J. L. +36 more
The EUV Imaging Spectrometer (EIS) on Hinode will observe solar corona and upper transition region emission lines in the wavelength ranges 170 - 210 Å and 250 - 290 Å. The line centroid positions and profile widths will allow plasma velocities and turbulent or non-thermal line broadenings to be measured. We will derive local plasma temperatures an…
X-Ray Imaging Spectrometer (XIS) on Board Suzaku
Hamaguchi, Kenji; Dotani, Tadayasu; Miller, Eric D. +43 more
The XIS is an X-ray Imaging Spectrometer system, consisting of state-of-the-art charge-coupled devices (CCDs) optimized for X-ray detection, camera bodies, and control electronics. Four sets of XIS sensors are placed at the focal planes of the grazing-incidence, nested thin-foil mirrors (XRT: X-Ray Telescope) onboard the Suzaku satellite. Three of…
zCOSMOS: A Large VLT/VIMOS Redshift Survey Covering 0 < z < 3 in the COSMOS Field
Smail, I.; Finoguenov, A.; Kneib, J. -P. +74 more
zCOSMOS is a large-redshift survey that is being undertaken in the COSMOS field using 600 hr of observation with the VIMOS spectrograph on the 8 m VLT. The survey is designed to characterize the environments of COSMOS galaxies from the 100 kpc scales of galaxy groups up to the 100 Mpc scale of the cosmic web and to produce diagnostic information o…