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Characteristics of Kepler Eclipsing Binaries Displaying a Significant O'Connell Effect
Perlman, Eric S.; Caballero-Nieves, Saida M.; Knote, Matthew F. +2 more
The O'Connell effect-the presence of unequal maxima in eclipsing binaries-remains an unsolved riddle in the study of close binary systems. The Kepler space telescope produced high-precision photometry of nearly 3000 eclipsing binary systems, providing a unique opportunity to study the O'Connell effect in a large sample and in greater detail than i…
Cosmological Model Tests with JWST
Lovyagin, Nikita; Raikov, Alexander; Yershov, Vladimir +1 more
The James Webb Space Telescope (JWST), which has recently become operational, is capable of detecting objects at record-breaking redshifts, z≳15. This is a crucial advance for observational cosmology, as at these redshifts the differences between alternative cosmological models manifest themselves in the most obvious way. In recent years, some obs…
SILVERRUSH. XII. Intensity Mapping for Lyα Emission Extending over 100-1000 Comoving Kpc around z 2-7 LAEs with Subaru HSC-SSP and CHORUS Data
Ono, Yoshiaki; Ouchi, Masami; Momose, Rieko +14 more
We conduct intensity mapping to probe for extended diffuse Lyα emission around Lyα emitters (LAEs) at z ~2-7, exploiting very deep (~26 mag at 5σ) and large-area (~4.5 deg2) Subaru/Hyper Suprime-Cam narrowband (NB) images and large LAE catalogs consisting of a total of 1540 LAEs at z = 2.2, 3.3, 5.7, and 6.6 obtained by the HSC-SSP and …
Directional detection of dark matter using solid-state quantum sensing
Ebadi, Reza; Marshall, Mason C.; Phillips, David F. +12 more
Next-generation dark matter (DM) detectors searching for weakly interacting massive particles (WIMPs) will be sensitive to coherent scattering from solar neutrinos, demanding an efficient background-signal discrimination tool. Directional detectors improve sensitivity to WIMP DM despite the irreducible neutrino background. Wide-bandgap semiconduct…
Ariel stellar characterisation. I. Homogeneous stellar parameters of 187 FGK planet host stars: Description and validation of the method
Rainer, M.; Bossini, D.; Sanna, N. +16 more
Context. In 2020 the European Space Agency selected Ariel as the next mission to join the space fleet of observatories to study planets outside our Solar System. Ariel will be devoted to the characterisation of 1000 planetary atmospheres in order to understand what exoplanets are made of, how they form, and how they evolve. To achieve the last two…
The Panchromatic Hubble Andromeda Treasury: Triangulum Extended Region (PHATTER). IV. Star Cluster Catalog
Bell, Eric F.; Williams, Benjamin F.; Johnson, L. Clifton +10 more
We construct a catalog of star clusters from Hubble Space Telescope images of the inner disk of the Triangulum Galaxy (M33) using image classifications collected by the Local Group Cluster Search, a citizen science project hosted on the Zooniverse platform. We identify 1214 star clusters within the Hubble Space Telescope imaging footprint of the P…
Limits on primordial black holes detectability with Isatis: a BlackHawk tool
Auffinger, Jérémy
Primordial black holes (PBHs) are convenient candidates to explain the elusive dark matter (DM). However, years of constraints from various astronomical observations have constrained their abundance over a wide range of masses, leaving only a narrow window open at
A search for ionised gas outflows in an Hα imaging atlas of nearby LINERs
Hermosa Muñoz, L.; Márquez, I.; Masegosa, J. +2 more
Context. Outflows play a major role in the evolution of galaxies. However, we do not yet have a complete picture of their properties (extension, geometry, orientation, and clumpiness). For low-luminosity active galactic nuclei (AGNs), in particular low-ionisation nuclear emission line regions (LINERs), the rate of outflows and their properties are…
Inferring the rotation period distribution of stars from their projected rotation velocities and radii: Application to late-F/early-G Kepler stars
Petigura, Erik A.; Hall, Oliver J.; Masuda, Kento
While stellar rotation periods Prot may be measured from broad-band photometry, the photometric modulation becomes harder to detect for slower rotators, which could bias measurements of the long-period tail of the Prot distribution. Alternatively, the Prot distribution of stars can be inferred from their projected …
Variability Timescales of Hα on Active Mid-to-late M dwarfs
Winters, Jennifer G.; Medina, Amber A.; Charbonneau, David +2 more
We present a study of the variation timescales of the chromospheric activity indicator Hα on a sample of 13 fully convective, active mid-to-late M stars with masses between 0.1 and 0.3 solar masses. Our goal was to determine the dominant variability timescale and, by inference, a possible mechanism responsible for the variation. We gathered 10 or …