Search Publications
A Constant Limiting Mass Scale for Flat Early-type Galaxies from z ~ 1 to z = 0: Density Evolves but Shapes Do Not
Franx, Marijn; van der Wel, Arjen; Rix, Hans-Walter +1 more
We measure the evolution in the intrinsic shape distribution of early-type galaxies from z ~ 1 to z ~ 0 by analyzing their projected axis-ratio distributions. We extract a low-redshift sample (0.04 < z < 0.08) of early-type galaxies with very low star formation rates from the Sloan Digital Sky Survey, based on a color-color selection scheme …
Orbital identification of clays and carbonates in Gusev crater
Poulet, Francois; Carter, John
Gusev crater was selected as the landing site of one of the two NASA Mars Exploration Rovers because water once could have ponded within the crater and partly filled it with sediments as suggested by the presence of a feeder channel and the fluvial-lacustrine morphology of the in-filling. However, the paucity of mineralogical evidence for fluvial-…
Optical and Infrared Photometry of Globular Clusters in NGC 1399: Evidence for Color-Metallicity Nonlinearity
Jordán, Andrés; Peng, Eric W.; Ferrarese, Laura +3 more
We combine new Wide Field Camera 3 IR Channel (WFC3/IR) F160W (H 160) imaging data for NGC 1399, the central galaxy in the Fornax cluster, with archival F475W (g 475), F606W (V 606), F814W (I 814), and F850LP (z 850) optical data from the Advanced Camera for Surveys (ACS). The purely optical g…
The flow of interstellar dust into the solar system
Kempf, S.; Srama, R.; Grün, E. +3 more
Context. Interstellar dust (ISD) is a major component in the formation and evolution of stars, stellar systems, and planets. Astronomical observations of interstellar extinction and polarization, and of the infrared emission of the dust, are the most commonly used technique for characterizing interstellar dust. Besides this, the interstellar dust …
Unveiling the Physical Properties and Kinematics of Molecular Gas in the Antennae Galaxies (NGC 4038/9) through High-resolution CO (J = 3-2) Observations
Tamura, Yoichi; Wilson, Christine D.; Yun, Min S. +12 more
We present a ~1'' (100 pc) resolution 12CO (3-2) map of the nearby intermediate-stage interacting galaxy pair NGC 4038/9 (the Antennae galaxies) obtained with the Submillimeter Array. We find that half the CO (3-2) emission originates in the overlap region where most of the tidally induced star formation had been previously found in sho…
Early-type Galaxies at z = 1.3. I. The Lynx Supercluster: Cluster and Groups at z = 1.3. Morphology and Color-Magnitude Relation
White, Richard L.; Illingworth, Garth D.; Koyama, Yusei +18 more
We confirm the detection of three groups in the Lynx supercluster, at z ≈ 1.3, through spectroscopic follow-up and X-ray imaging, and we give estimates for their redshifts and masses. We study the properties of the group galaxies compared to the two central clusters, RX J0849+4452 and RX J0848+4453. Using spectroscopic follow-up and multi-waveleng…
High-resolution XMM-Newton Spectroscopy of the Cooling Flow Cluster A3112
Loewenstein, Michael; Smith, Randall K.; Mushotzky, Richard +4 more
We examine high signal-to-noise XMM-Newton European Photon Imaging Camera (EPIC) and Reflection Grating Spectrometer (RGS) observations to determine the physical characteristics of the gas in the cool core and outskirts of the nearby rich cluster A3112. The XMM-Newton Extended Source Analysis Software data reduction and background modeling methods…
The Gaia spectrophotometric standard stars survey - I. Preliminary results
Jordi, C.; Monguió, M.; Figueras, F. +23 more
We describe two ground-based observing campaigns aimed at building a grid of approximately 200 spectrophotometric standard stars (SPSS), with an internal ≃1 per cent precision and tied to Vega within ≃3 per cent, for the absolute flux calibration of data gathered by Gaia, the European Space Agency (ESA) astrometric mission. The criteria for the se…
Titan's Bulk Composition Constrained by Cassini-Huygens: Implication for Internal Outgassing
Hersant, F.; Tobie, G.; Gautier, D.
In the present report, by using a series of data gathered by the Cassini-Huygens mission, we constrain the bulk content of Titan's interior for various gas species (CH4, CO2, CO, NH3, H2S, Ar, Ne, Xe), and we show that most of the gas compounds (except H2S and Xe) initially incorporated within…
The SWELLS survey - III. Disfavouring 'heavy' initial mass functions for spiral lens galaxies
Treu, Tommaso; Marshall, Philip J.; Auger, Matthew W. +6 more
We present gravitational lens models for 20 strong gravitational lens systems observed as part of the Sloan WFC Edge-on Late-type Lens Survey (SWELLS) project. 15 of the lenses are taken from Paper I, while five are newly discovered systems. The systems are galaxy-galaxy lenses where the foreground deflector has an inclined disc, with a wide range…