Search Publications
Missions
Journals
Publication Years
Cloud Atlas: Discovery of Patchy Clouds and High-amplitude Rotational Modulations in a Young, Extremely Red L-type Brown Dwarf
Schneider, Glenn; Cowan, Nicolas B.; Burgasser, Adam J. +10 more
Condensate clouds fundamentally impact the atmospheric structure and spectra of exoplanets and brown dwarfs, but the connections between surface gravity, cloud structure, dust in the upper atmosphere, and the red colors of some brown dwarfs remain poorly understood. Rotational modulations enable the study of different clouds in the same atmosphere…
Insights into surface runoff on early Mars from paleolake basin morphology and stratigraphy
Mustard, John F.; Goudge, Timothy A.; Head, James W. +2 more
Chandra Observes the End of an Era in SN 1987A
Zhekov, Svetozar A.; Dwek, Eli; Park, Sangwook +3 more
Updated imaging and photometric results from Chandra observations of SN 1987A, covering the last 16 years, are presented. We find that the 0.5-2 keV light curve has remained constant at ∼8 × 10-12 erg s-1 cm-2 since 9500 days, with the 3-8 keV light curve continuing to increase until at least 10,000 days. The expan…
Gaia Data Release 1. Principles of the photometric calibration of the G band
Jordi, C.; Balaguer-Núñez, L.; Evans, D. W. +24 more
Context. Gaia is an ESA cornerstone mission launched on 19 December 2013 aiming to obtain the most complete and precise 3D map of our Galaxy by observing more than one billion sources. This paper is part of a series of documents explaining the data processing and its results for Gaia Data Release 1, focussing on the G band photometry.
Aims: T…
Updated constraints and forecasts on primordial tensor modes
Melchiorri, Alessandro; Cabass, Giovanni; Gerbino, Martina +3 more
We present new, tight, constraints on the cosmological background of gravitational waves (GWs) using the latest measurements of CMB temperature and polarization anisotropies provided by the Planck, BICEP2 and Keck Array experiments. These constraints are further improved when the GW contribution NeffGW to the effective number…
A free-form prediction for the reappearance of supernova Refsdal in the Hubble Frontier Fields cluster MACSJ1149.5+2223
Broadhurst, Tom; Zheng, Wei; Zitrin, Adi +7 more
The massive cluster MACSJ1149.5+2223(z = 0.544) displays five very large lensed images of a well-resolved spiral galaxy at zspect = 1.491. It is within one of these images that the first example of a multiply lensed supernova (SN) has been detected recently as part of the Grism Lens-Amplified Survey from Space. The depth of this data al…
A package for the automated classification of periodic variable stars
Bailer-Jones, Coryn A. L.; Kim, Dae-Won
We present a machine learning package for the classification of periodic variable stars. Our package is intended to be general: it can classify any single band optical light curve comprising at least a few tens of observations covering durations from weeks to years with arbitrary time sampling. We use light curves of periodic variable stars taken …
The plasma structure of coronal hole solar wind: Origins and evolution
Borovsky, Joseph E.
Whereas slow solar wind is known to be highly structured, the fast (coronal hole origin) wind is usually considered to be homogeneous. Using measurements from Helios 1 + 2, ACE, Wind, and Ulysses, structure in the coronal hole origin solar wind is examined from 0.3 AU to 2.3 AU. Care is taken to collect and analyze intervals of "unperturbed corona…
Fission and reconfiguration of bilobate comets as revealed by 67P/Churyumov-Gerasimenko
Mottola, Stefano; Steckloff, Jordan; Naidu, Shantanu P. +6 more
The solid, central part of a comet—its nucleus—is subject to destructive processes, which cause nuclei to split at a rate of about 0.01 per year per comet. These destructive events are due to a range of possible thermophysical effects; however, the geophysical expressions of these effects are unknown. Separately, over two-thirds of comet nuclei th…
Tracing outflows in the AGN forbidden region with SINFONI
Piconcelli, E.; Brusa, M.; Mainieri, V. +8 more
Context. Active galactic nucleus (AGN) driven outflows are invoked in numerical simulations to reproduce several observed properties of local galaxies. The z > 1 epoch is of particular interest as it was during this time that the volume averaged star formation and the accretion rate of black holes were at their maximum. Radiatively driven outfl…