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Constraints on the Dust Size Distributions in the HD 163296 Disk from the Difference of the Apparent Dust Ring Widths between Two ALMA Bands
Kataoka, Akimasa; Doi, Kiyoaki
The dust size in protoplanetary disks is a crucial parameter for understanding planet formation, while the observational constraints on dust size distribution have large uncertainties. In this study, we present a new method to constrain the dust size distribution from the dust spatial distribution, utilizing the fact that larger dust grains are mo…
(523599) 2003 RM: The Asteroid that Wanted to be a Comet
Granvik, Mikael; Wainscoat, Richard J.; Weryk, Robert +11 more
We report a statistically significant detection of nongravitational acceleration on the subkilometer near-Earth asteroid (523599) 2003 RM. Due to its orbit, 2003 RM experiences favorable observing apparitions every 5 yr. Thus, since its discovery, 2003 RM has been extensively tracked with ground-based optical facilities in 2003, 2008, 2013, and 20…
The IACOB project. VIII. Searching for empirical signatures of binarity in fast-rotating O-type stars
Herrero, A.; Simón-Díaz, S.; Nazé, Y. +6 more
Context. The empirical distribution of projected rotational velocities (v sin i) in massive O-type stars is characterised by a dominant slow velocity component and a tail of fast rotators. It has been proposed that binary interaction plays a dominant role in the formation of this tail.
Aims: We perform a complete and homogeneous search for em…
The Unified Cluster Catalogue: towards a comprehensive and homogeneous data base of stellar clusters
Perren, Gabriel I.; Pera, María S.; Navone, Hugo D. +1 more
We introduce the Unified Cluster Catalogue, the largest catalogue of stellar clusters currently listing nearly 14 000 objects. In this initial release, it exclusively contains Milky Way open clusters, with plans to include other objects in future updates. Each cluster is processed using a novel probability membership algorithm, which incorporates …
Dependence of Cosmological Constraints on Gray Photometric Zero-point Uncertainties of Supernova Surveys
Riess, Adam G.; Stubbs, Christopher W.; Brout, Dillon +2 more
Type Ia supernova (SN) measurements of the Hubble constant, H 0; cosmic mass density, Ω M ; and dark energy equation-of-state parameter, w, rely on heterogeneous SN surveys across three decades of observation. These distinct surveys may have undiagnosed, relative photometric zero-point errors. We determine the sensitivities o…
Investigating the Narrow-line Region Dynamics in Nearby Active Galaxies
Fischer, Travis C.; Crenshaw, D. Michael; Schmitt, Henrique R. +7 more
We present dynamical models of the narrow-line region (NLR) outflows in the nearby Seyfert galaxies Mrk 3, Mrk 78, NGC 1068, and NGC 4151 using observations from the Hubble Space Telescope and Apache Point Observatory. We employ long-slit spectroscopy to map the spatially resolved outflow and rotational velocities of the ionized gas. We also perfo…
Multiphase Gas Interactions on Subarcsec Scales in the Shocked Intergalactic Medium of Stephan's Quintet with JWST and ALMA
Togi, Aditya; Duc, P. -A.; Appleton, P. N. +12 more
We combine James Webb Space Telescope (JWST) and Hubble Space Telescope imaging with Atacama Large Millimeter Array CO(2-1) spectroscopy to study the highly turbulent multiphase intergalactic medium (IGM) in Stephan's Quintet on 25-150 pc scales. Previous Spitzer observations revealed luminous H2 line cooling across a 45 kpc-long filame…
JWST NIRCam Defocused Imaging: Photometric Stability Performance and How It Can Sense Mirror Tilts
Gennaro, Mario; Espinoza, Néstor; Perrin, Marshall D. +25 more
We use JWST NIRCam short-wavelength photometry to capture a transit lightcurve of the exoplanet HAT-P-14 b to assess performance as part of instrument commissioning. The short-wavelength precision is 152 ppm per 27 s integration as measured over the full time series compared to a theoretical limit of 107 ppm, after corrections to spatially correla…
A hidden population of white dwarfs with atmospheric carbon traces in the Gaia bifurcation
Rebassa-Mansergas, Alberto; Hollands, Mark; Althaus, Leandro G. +4 more
Context. The high-quality photometric and astrometric capabilities of the ESA Gaia space mission have revealed a bifurcation of the white dwarf sequence on the color magnitude diagram with two branches: A and B. While the A branch consists mostly of white dwarfs with hydrogen(H)-rich atmospheres, the B branch is not completely understood. Although…
TOI-5678b: A 48-day transiting Neptune-mass planet characterized with CHEOPS and HARPS★
Alonso, R.; Bouchy, F.; Deleuil, M. +92 more
Context. A large sample of long-period giant planets has been discovered thanks to long-term radial velocity surveys, but only a few dozen of these planets have a precise radius measurement. Transiting gas giants are crucial targets for the study of atmospheric composition across a wide range of equilibrium temperatures and, more importantly, for …