Search Publications
Models for 60 double-lined binaries containing giants
Eggleton, Peter P.; Yakut, Kadri
The observed masses, radii and temperatures of 60 medium- to long-period binaries, most of which contain a cool, evolved star and a hotter less evolved one, are compared with theoretical models which include (a) core convective overshooting, (b) mass-loss, possibly driven by dynamo action as in RS CVn binaries, and (c) tidal friction, including it…
Integrated cosmological probes: Extended analysis
Amara, Adam; Refregier, Alexandre; Nicola, Andrina
Recent progress in cosmology has relied on combining different cosmological probes. In an earlier work, we implemented an integrated approach to cosmology where the probes are combined into a common framework at the map level. This has the advantage of taking full account of the correlations between the different probes, to provide a stringent tes…
A Hubble Diagram for Quasars
Risaliti, Guido; Lusso, Elisabeta; Bisogni, Susanna
The cosmological model is at present not tested between the redshift of the farthest observed supernovae (z 1.4) and that of the Cosmic Microwave Background (z 1,100). Here we introduce a new method to measure the cosmological parameters: we show that quasars can be used as “standard candles” by employing the non-linear relation between their intr…
Small Coronal Holes Near Active Regions as Sources of Slow Solar Wind
Wang, Y. -M.
We discuss the nature of the small areas of rapidly diverging, open magnetic flux that form in the strong unipolar fields at the peripheries of active regions (ARs), according to coronal extrapolations of photospheric field measurements. Because such regions usually have dark counterparts in extreme-ultraviolet (EUV) images, we refer to them as co…
Investigation of diurnal variability of water vapor in Enceladus' plume by the Cassini ultraviolet imaging spectrograph
Hansen, C. J.; Hendrix, A. R.; Portyankina, G. +4 more
An occultation of ɛ Orionis by Enceladus' plume was observed with Enceladus at an orbital longitude near apoapsis in order to investigate whether water vapor flow is modulated diurnally, similar to ice particles. The occultation showed that the bulk water vapor emanating from Enceladus changes little with orbital position. The amount of gas in at …
Void Profile from Planck Lensing Potential Map
Sawangwit, Utane; Chantavat, Teeraparb; Wandelt, Benjamin D.
We use the lensing potential map from Planck CMB lensing reconstruction analysis and the “Public Cosmic Void Catalog” to measure the stacked void lensing potential. We have made an attempt to fit the HSW void profile parameters from the stacked lensing potential. In this profile, four parameters are needed to describe the shape of voids with diffe…
Determining the Halo Mass Scale Where Galaxies Lose Their Gas
Moustakas, John; Aragón-Salamanca, Alfonso; Milvang-Jensen, Bo +9 more
A major question in galaxy formation is how the gas supply that fuels activity in galaxies is modulated by their environment. We use spectroscopy of a set of well-characterized clusters and groups at 0.4 < z < 0.8 from the ESO Distant Cluster Survey and compare it to identically selected field galaxies. Our spectroscopy allows us to isolate …
Blind Millimeter Line Emitter Search using ALMA Data Toward Gravitational Lensing Clusters
Tamura, Yoichi; Kohno, Kotaro; Oguri, Masamune +10 more
We present the results of a blind millimeter line emitter search using ALMA Band 6 data with a single-frequency tuning toward four gravitational lensing clusters (RXJ1347.5-1145, Abell S0592, MACS J0416.1-2403, and Abell 2744). We construct 3D signal-to-noise ratio (S/N) cubes with 60 and 100 MHz binning, and search for millimeter line emitters. W…
Gas Content and Kinematics in Clumpy, Turbulent Star-forming Disks
Glazebrook, Karl; Bolatto, Alberto D.; Obreschkow, Danail +6 more
We present molecular gas-mass estimates for a sample of 13 local galaxies whose kinematic and star-forming properties closely resemble those observed in z ≈ 1.5 main-sequence galaxies. Plateau de Bure observations of the CO[1-0] emission line and Herschel Space Observatory observations of the dust emission both suggest molecular gas-mass fractions…
Normal and counter Evershed flows in the photospheric penumbra of a sunspot. SPINOR 2D inversions of Hinode-SOT/SP observations
Solanki, S. K.; Lagg, A.; Jurčák, J. +2 more
Context. The Evershed effect, a nearly horizontal outflow of material seen in the penumbrae of sunspots in the photospheric layers, is a common characteristic of well-developed penumbrae, but is still not well understood. Even less is known about photospheric horizontal inflows in the penumbra, also known as counter Evershed flows.
Aims: Here…