Search Publications
Peculiar Velocity Constraints from Five-band SZ Effect Measurements toward RX J1347.5-1145 with MUSIC and Bolocam from the CSO
Czakon, Nicole G.; Glenn, Jason; Zemcov, Michael +25 more
We present Sunyaev-Zel’dovich (SZ) effect measurements from wide-field images toward the galaxy cluster RX J1347.5-1145 obtained from the Caltech Submillimeter Observatory with the Multiwavelength Submillimeter Inductance Camera at 147, 213, 281, and 337 GHz and with Bolocam at 140 GHz. As part of our analysis, we have used higher frequency data f…
Constraints on an exosphere at Ceres from Hubble Space Telescope observations
Saur, Joachim; Roth, Lorenz; Feldman, Paul D. +5 more
We report far ultraviolet observations of Ceres obtained with the Cosmic Origin Spectrograph (COS) of the Hubble Space Telescope in the search for atomic emissions from an exosphere. The derived brightnesses at the oxygen lines at 1304 Å and 1356 Å are consistent with zero signals within the 1σ propagated statistical uncertainties. The OI 1304 Å b…
Large dust gaps in the transitional disks of HD 100453 and HD 34282. Connecting the gap size to the spectral energy distribution and mid-infrared imaging
Tielens, A. G. G. M.; Khalafinejad, S.; Maaskant, K. M. +1 more
Context. The formation of dust gaps in protoplanetary disks is one of the most important signs of disk evolution and might indicate the formation of planets.
Aims: We aim to characterize the flaring disk structure around the Herbig Ae/Be stars HD 100453 and HD 34282. Their spectral energy distributions (SEDs) show an emission excess between 1…
Robust automatic photometry of local galaxies from SDSS. Dissecting the color magnitude relation with color profiles
Fumagalli, Michele; Fossati, Matteo; Consolandi, Guido +2 more
We present an automatic procedure to perform reliable photometry of galaxies on SDSS images. We selected a sample of 5853 galaxies in the Coma and Virgo superclusters. For each galaxy, we derive Petrosian g and I magnitudes, surface brightness and color profiles. Unlike the SDSS pipeline, our procedure is not affected by the well known shredding p…
First in-situ detection of the cometary ammonium ion NH_4+ (protonated ammonia NH3) in the coma of 67P/C-G near perihelion
Altwegg, K.; Balsiger, H.; Fuselier, S. A. +21 more
In this paper, we report the first in situ detection of the ammonium ion NH_4+ at 67P/Churyumov-Gerasimenko (67P/C-G) in a cometary coma, using the Rosetta Orbiter Spectrometer for Ion and Neutral Analysis (ROSINA)/Double Focusing Mass Spectrometer (DFMS). Unlike neutral and ion spectrometers onboard previous cometary missions, the ROSI…
Properties of dust particles in comets from photometric and polarimetric observations of 67P
Lasue, J.; Hines, D. C.; Sen, A. K. +3 more
Remote observations of the light scattered by dust particles in comet 67P/Churyumov-Gerasimenko (67P/C-G) (photometry and imaging polarimetry) allow us to compare the deduced physical properties of these particles with in situ measurements provided by the Rosetta mission. Onboard experiments on the dust confirm properties inferred from polarimetri…
On the connection between the metal-enriched intergalactic medium and galaxies: an O VI-galaxy cross-correlation study at z < 1
Tejos, Nicolas; Morris, Simon L.; Fumagalli, Michele +10 more
We present new results on the auto- and cross-correlation functions of galaxies and O VI absorbers in a ∼18 Gpc3 comoving volume at z < 1. We use a sample of 51 296 galaxies and 140 O VI absorbers in the column density range 13 ≲ log N ≲ 15 to measure two-point correlation functions in the two dimensions transverse and orthogonal to …
An enduring rapidly moving storm as a guide to Saturn's Equatorial jet's complex structure
Hueso, R.; Sánchez-Lavega, A.; Rojas, J. F. +13 more
Saturn has an intense and broad eastward equatorial jet with a complex three-dimensional structure mixed with time variability. The equatorial region experiences strong seasonal insolation variations enhanced by ring shadowing, and three of the six known giant planetary-scale storms have developed in it. These factors make Saturn's equator a natur…
Blue straggler star populations in globular clusters - II. Proper-motion cleaned HST catalogues of BSSs in 38 Galactic GCs
Puzia, Thomas H.; Simunovic, Mirko
We present new blue straggler star (BSS) catalogues in 38 Milky Way globular clusters (GCs) based on multipassband and multi-epoch treasury survey data from the Hubble Space Telescope. We measure precise astrometry and relative proper motions of stars in all target clusters and performed a subsequent cluster membership selection. We study the accu…
Toward a Network of Faint DA White Dwarfs as High-precision Spectrophotometric Standards
Rest, A.; Saha, A.; Stubbs, C. W. +8 more
We present the initial results from a program aimed at establishing a network of hot DA white dwarfs to serve as spectrophotometric standards for present and future wide-field surveys. These stars span the equatorial zone and are faint enough to be conveniently observed throughout the year with large-aperture telescopes. The spectra of these white…