Search Publications
Magnetic moment and plasma environment of HD 209458b as determined from Lyα observations
Holmström, Mats; Lammer, Helmut; Kislyakova, Kristina G. +2 more
Transit observations of HD 209458b in the stellar Lyman-α(Lyα) line revealed strong absorption in both blue and red wings of the line interpreted as hydrogen atoms escaping from the planet’s exosphere at high velocities. The following sources for the absorption were suggested: acceleration by the stellar radiation pressure, natural spectral line b…
A Geometrically Supported z ~ 10 Candidate Multiply Imaged by the Hubble Frontier Fields Cluster A2744
Broadhurst, Tom; Kelson, Daniel D.; Moustakas, John +11 more
The deflection angles of lensed sources increase with their distance behind a given lens. We utilize this geometric effect to corroborate the z phot ~= 9.8 photometric redshift estimate of a faint near-IR dropout, triply imaged by the massive galaxy cluster A2744 in deep Hubble Frontier Fields images. The multiple images of this source …
Fueling Active Galactic Nuclei. II. Spatially Resolved Molecular Inflows and Outflows
Malkan, M. A.; Burtscher, L.; Schnorr-Müller, A. +11 more
We analyze the two-dimensional distribution and kinematics of the stars as well as molecular and ionized gas in the central few hundred parsecs of five active and five matched inactive galaxies. The equivalent widths of the Brγ line indicate that there is no ongoing star formation in their nuclei, although recent (terminated) starbursts are possib…
Neutrinos help reconcile Planck measurements with both the early and local Universe
Dvorkin, Cora; Hu, Wayne; Wyman, Mark +1 more
In light of the recent BICEP2 B-mode polarization detection, which implies a large inflationary tensor-to-scalar ratio r0.05=0.2-0.05+0.07, we re-examine the evidence for an extra sterile massive neutrino, originally invoked to account for the tension between the cosmic microwave background (CMB) temperature power spectrum and local mea…
The bathymetry of a Titan sea
Paillou, Philippe; Zebker, Howard; Lunine, Jonathan +9 more
We construct the depth profile—the bathymetry—of Titan's large sea Ligeia Mare from Cassini RADAR data collected during the 23 May 2013 (T91) nadir-looking altimetry flyby. We find the greatest depth to be about 160 m and a seabed slope that is gentler toward the northern shore, consistent with previously imaged shoreline morphologies. Low radio s…
Statistical survey of widely spread out solar electron events observed with STEREO and ACE with special attention to anisotropies
Gómez-Herrero, R.; Malandraki, O.; Dresing, N. +4 more
Context. In February 2011, the two STEREO spacecrafts reached a separation of 180 degrees in longitude, offering a complete view of the Sun for the first time ever. When the full Sun surface is visible, source active regions of solar energetic particle (SEP) events can be identified unambiguously. STEREO, in combination with near-Earth observatori…
The Dependence of Galactic Outflows on the Properties and Orientation of zCOSMOS Galaxies at z ~ 1
Kneib, J. -P.; Cimatti, A.; Bolzonella, M. +44 more
We present an analysis of cool outflowing gas around galaxies, traced by Mg II absorption lines in the coadded spectra of a sample of 486 zCOSMOS galaxies at 1 <= z <= 1.5. These galaxies span a range of stellar masses (9.45 <= log10[M */M ⊙] <= 10.7) and star formation rates (0.14 <= log10
Spectral Energy Distributions of QSOs at z > 5: Common Active Galactic Nucleus-heated Dust and Occasionally Strong Star-formation
Meisenheimer, K.; Walter, F.; Krause, O. +7 more
We present spectral energy distributions (SEDs) of 69 QSOs at z > 5, covering a rest frame wavelength range of 0.1 µm to ~80 µm, and centered on new Spitzer and Herschel observations. The detection rate of the QSOs with Spitzer is very high (97% at λrest <~ 4 µm), but drops toward the Herschel bands with 30% dete…
NGC 1277: A Massive Compact Relic Galaxy in the Nearby Universe
Vazdekis, Alexandre; Trujillo, Ignacio; Balcells, Marc +2 more
As early as 10 Gyr ago, galaxies with more than 1011 M ⊙ of stars already existed. While most of these massive galaxies must have subsequently transformed through on-going star formation and mergers with other galaxies, a small fraction (lsim0.1%) may have survived untouched until today. Searches for such relic galaxies, usef…
The Luminosity Function at z ~ 8 from 97 Y-band Dropouts: Inferences about Reionization
Holwerda, Benne W.; Stiavelli, Massimo; Schmidt, Kasper B. +6 more
We present the largest search to date for Y-band dropout galaxies (z ~ 8 Lyman break galaxies, LBGs) based on 350 arcmin2 of Hubble Space Telescope observations in the V, Y, J, and H bands from the Brightest of Reionizing Galaxies (BoRG) survey. In addition to previously published data, the BoRG13 data set presented here includes approx…