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Zodiacal Exoplanets in Time (ZEIT). V. A Uniform Search for Transiting Planets in Young Clusters Observed by K2
Vanderburg, Andrew; Rizzuto, Aaron C.; Kraus, Adam L. +2 more
Detection of transiting exoplanets around young stars is more difficult than for older systems owing to increased stellar variability. Nine young open cluster planets have been found in the K2 data, but no single analysis pipeline identified all planets. We have developed a transit search pipeline for young stars that uses a transit-shaped notch a…
Impact of neutrino properties on the estimation of inflationary parameters from current and future observations
Ho, Shirley; Mena, Olga; Gerbino, Martina +4 more
We study the impact of assumptions about neutrino properties on the estimation of inflationary parameters from cosmological data, with a specific focus on the allowed contours in the ns/r plane, where ns is the scalar spectral index and r is the tensor-to-scalar ratio. We study the following neutrino properties: (i) the total…
Lensing Constraints on the Mass Profile Shape and the Splashback Radius of Galaxy Clusters
Umetsu, Keiichi; Diemer, Benedikt
The lensing signal around galaxy clusters can, in principle, be used to test detailed predictions for their average mass profile from numerical simulations. However, the intrinsic shape of the profiles can be smeared out when a sample that spans a wide range of cluster masses is averaged in physical length units. This effect especially conceals ra…
The Dragonfly Nearby Galaxies Survey. III. The Luminosity Function of the M101 Group
van Dokkum, Pieter; Abraham, Roberto; Danieli, Shany +4 more
We obtained follow-up HST observations of the seven low surface brightness galaxies discovered with the Dragonfly Telephoto Array in the field of the massive spiral galaxy M101. Out of the seven galaxies, only three were resolved into stars and are potentially associated with the M101 group at D = 7 Mpc. Based on HST ACS photometry in the broad F6…
Relations between the Sizes of Galaxies and Their Dark Matter Halos at Redshifts 0 < z < 3
Pérez-González, Pablo G.; Ferguson, Henry C.; van der Wel, Arjen +6 more
We derive relations between the effective radii R eff of galaxies and the virial radii R 200c of their dark matter halos over the redshift range 0 < z < 3. For galaxies, we use the measured sizes from deep images taken with Hubble Space Telescope for the Cosmic Assembly Near-infrared Deep Extragalactic Legacy Survey; f…
A Physical Model-based Correction for Charge Traps in the Hubble Space Telescope’s Wide Field Camera 3 Near-IR Detector and Its Applications to Transiting Exoplanets and Brown Dwarfs
Schneider, Glenn; Apai, Dániel; Zhou, Yifan +1 more
The Hubble Space Telescope Wide Field Camera 3 (WFC3) near-IR channel is extensively used in time-resolved observations, especially for transiting exoplanet spectroscopy as well as brown dwarf and directly imaged exoplanet rotational phase mapping. The ramp effect is the dominant source of systematics in the WFC3 for time-resolved observations, wh…
Solar abundance ratios of the iron-peak elements in the Perseus cluster
Done, Chris; Safi-Harb, Samar; Hamaguchi, Kenji +191 more
The metal abundance of the hot plasma that permeates galaxy clusters represents the accumulation of heavy elements produced by billions of supernovae. Therefore, X-ray spectroscopy of the intracluster medium provides an opportunity to investigate the nature of supernova explosions integrated over cosmic time. In particular, the abundance of the ir…
Venus Surface Composition Constrained by Observation and Experiment
Helbert, Jörn; Gilmore, Martha; Treiman, Allan +1 more
New observations from the Venus Express spacecraft as well as theoretical and experimental investigation of Venus analogue materials have advanced our understanding of the petrology of Venus melts and the mineralogy of rocks on the surface. The VIRTIS instrument aboard Venus Express provided a map of the southern hemisphere of Venus at ∼1 µm…
Infrared spectroscopy of eruptive variable protostars from VVV
Minniti, D.; Marocco, F.; Lucas, P. W. +11 more
In a companion work (Paper I), we detected a large population of highly variable Young Stellar Objects (YSOs) in the Vista Variables in the Via Lactea (VVV) survey, typically with class I or flat spectrum spectral energy distributions and diverse light-curve types. Here we present infrared spectra (0.9-2.5 µm) of 37 of these variables, many …
Connection between Stellar Mass Distributions within Galaxies and Quenching Since z = 2
Tacchella, Sandro; Renzini, Alvio; Onodera, Masato +5 more
We study the history from z∼ 2 to z∼ 0 of the stellar mass assembly of quiescent and star-forming galaxies in a spatially resolved fashion. For this purpose, we use multi-wavelength imaging data from the Hubble Space Telescope (HST) over the GOODS fields and the Sloan Digital Sky Survey (SDSS) for the local population. We present the radial stella…