Search Publications
SPOTS: The Search for Planets Orbiting Two Stars. II. First constraints on the frequency of sub-stellar companions on wide circumbinary orbits
Janson, M.; Desidera, S.; Bonavita, M. +4 more
A large number of direct imaging surveys for exoplanets have been performed in recent years, yielding the first directly imaged planets and providing constraints on the prevalence and distribution of wide planetary systems. However, like most of the radial velocity ones, these generally focus on single stars, hence binaries and higher-order multip…
Testing deviations from ΛCDM with growth rate measurements from six large-scale structure surveys at z = 0.06-1
Ho, Shirley; Silvestri, Alessandra; Alam, Shadab
We use measurements from the Planck satellite mission and galaxy redshift surveys over the last decade to test three of the basic assumptions of the standard model of cosmology, ΛCDM (Λ cold dark matter): the spatial curvature of the universe, the nature of dark energy and the laws of gravity on large scales. We obtain improved constraints on seve…
An HST Survey of the Highest-velocity Ejecta in Cassiopeia A
Milisavljevic, Dan; Fesen, Robert A.
We present Hubble Space Telescope WFC3/IR images of the Cassiopeia A supernova remnant that survey its high-velocity, S-rich debris in the NE jet and SW counterjet regions through [S III] λλ9069, 9531 and [S II] λλ10,287-10,370 line emissions. We identify nearly 3400 sulfur emitting knots concentrated in ∼120° wide opposing streams, almost triple …
Rosetta Lander - Landing and operations on comet 67P/Churyumov-Gerasimenko
Finke, Felix; Ulamec, Stephan; Biele, Jens +10 more
The Rosetta Lander Philae is part of the ESA Rosetta Mission which reached comet 67P/Churyumov-Gerasimenko after a 10 year cruise in August 2014. Since then, Rosetta has been studying both its nucleus and coma with instruments aboard the Orbiter. On November 12th, 2014 the Lander, Philae, was successfully delivered to the surface of the comet and …
Constraining Globular Cluster Age Uncertainties using the IR Color-Magnitude Diagram
Brown, Thomas M.; Gennaro, Mario; Calamida, Annalisa +2 more
Globular Clusters (GCs) in the Milky Way are the primary laboratories for establishing the ages of the oldest stellar populations and for measuring the color-magnitude relation of stars. In infrared (IR) color-magnitude diagrams (CMDs), the stellar main sequence (MS) exhibits a “kink” due to opacity effects in M dwarfs such that lower mass and coo…
The injection of ten electron/3He-rich SEP events
Krucker, Säm; Li, Gang; Mason, Glenn M. +2 more
We have derived the particle injections at the Sun for ten good electron/3He-rich solar energetic particle (SEP) events, using a 1.2 AU particle path length (suggested by analysis of the velocity dispersion). The inferred solar injections of high-energy (~10 to 300 keV) electrons and of ~MeV/nucleon ions (carbon and heavier) start with …
Height formation of bright points observed by IRIS in Mg II line wings during flux emergence
Heinzel, P.; Schmieder, B.; Berlicki, A. +3 more
Context. A flux emergence in the active region AR 111850 was observed on September 24, 2013 with the Interface Region Imaging Spectrograph (IRIS). Many bright points are associated with the new emerging flux and show enhancement brightening in the UV spectra.
Aims: The aim of this work is to compute the altitude formation of the compact brigh…
The Phase Space of z∼1.2 SpARCS Clusters: Using Herschel to Probe Dust Temperature as a Function of Environment and Accretion History
Muzzin, A.; van der Burg, R. F. J.; Wilson, G. +5 more
We present a five-band Herschel study (100-500 µm) of three galaxy clusters at z∼ 1.2 from the Spitzer Adaptation of the Red-Sequence Cluster Survey. With a sample of 120 spectroscopically confirmed cluster members, we investigate the role of environment on galaxy properties utilizing the projected cluster phase space (line-of-sight velocity…
Quantifying tensions between CMB and distance data sets in models with free curvature or lensing amplitude
Mohr, J. J.; Saro, A.; Dietrich, J. P. +2 more
Recent measurements of the cosmic microwave background (CMB) by the Planck Collaboration have produced arguably the most powerful observational evidence in support of the standard model of cosmology, I.e. the spatially flat ΛCDM paradigm. In this work, we perform model selection tests to examine whether the base CMB temperature and large scale pol…
Galaxies Probing Galaxies at High Resolution: Co-rotating Gas Associated with a Milky Way Analog at z=0.4
Moustakas, John; Coil, Alison L.; Tremonti, Christy A. +5 more
We present results on gas flows in the halo of a Milky-Way-like galaxy at z = 0.413 based on high-resolution spectroscopy of a background galaxy. This is the first study of circumgalactic gas at high spectral resolution toward an extended background source (I.e., a galaxy rather than a quasar). Using long-slit spectroscopy of the foreground galaxy…