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The SOPHIE search for northern extrasolar planets. XII. Three giant planets suitable for astrometric mass determination with Gaia
Bouchy, F.; Deleuil, M.; Moutou, C. +22 more
We present new radial velocity measurements for three low-metallicity solar-like stars observed with the SOPHIE spectrograph and its predecessor ELODIE, both installed at the 193 cm telescope of the Haute-Provence Observatory, allowing the detection and characterization of three new giant extrasolar planets in intermediate periods of 1.7 to 3.7 yr…
A Complete Census of Hα Emitters in NGC 6397
Pallanca, Cristina; Mucciarelli, Alessio; Ferraro, Francesco R. +3 more
We used a data set of archival Hubble Space Telescope images obtained through the F555W, F814W, and F656N filters to perform a complete search for objects showing {{H}}α emission in the globular cluster NGC 6397. As a photometric diagnostic, we used the {(V-{{H}}α )}0 color excess in the {(V-{{H}}α )}0-{(V-I)}0 col…
Near-periodical spin period evolution in the binary system LMC X-4
Tsygankov, S.; Lutovinov, A.; Molkov, S. +2 more
In this paper, we investigated the long-term evolution of the pulse period in the high-mass X-ray binary LMC X-4 by taking advantage of more than 43 yr of measurements in the X-ray domain. Our analysis revealed for the first time that the source is displaying near-periodical variations of its spin period on a time-scale of roughly 6.8 yr, making L…
Minimal Magnetic States of the Sun and the Solar Wind: Implications for the Origin of the Slow Solar Wind
von Steiger, R.; Cliver, E. W.
During the last decade it has been proposed that both the Sun and the solar wind have minimum magnetic states, lowest order levels of magnetism that underlie the 11-yr cycle as well as longer-term variability. Here we review the literature on basal magnetic states at the Sun and in the heliosphere and draw a connection between the two based on the…
SHARDS Frontier Fields: Physical Properties of a Low-mass Lyα Emitter at z = 5.75
Pérez-González, Pablo G.; Richard, Johan; Conselice, Christopher J. +20 more
We analyze the properties of a multiply imaged Lyα (Lyα) emitter at z = 5.75 identified through SHARDS Frontier Fields intermediate-band imaging of the Hubble Frontier Fields (HFF) cluster Abell 370. The source, A370-L57, has low intrinsic luminosity (M UV ∼ -16.5), steep UV spectral index (β = -2.4 ± 0.1), and extreme rest-frame equiva…
Growth rate measurement of ULF waves in the ion foreshock
Hietala, H.; Angelopoulos, V.; Dorfman, S. +1 more
We report the first satellite measurement of the ultralow frequency (ULF) wave growth rate in the upstream region of the Earth's bow shock. We employ the two identical ARTEMIS spacecraft orbiting the Moon to characterize crescent-shaped reflected ion beams and relatively monochromatic ULF waves. The event presented here features spacecraft separat…
Characterizing dw1335-29, a recently discovered dwarf satellite of M83
Bell, Eric F.; Monachesi, Antonela; Bailin, Jeremy +4 more
The number, distribution and properties of dwarf satellites are crucial probes of the physics of galaxy formation at low masses and the response of satellite galaxies to the tidal and gas dynamical effects of their more massive parent. To make progress, it is necessary to augment and solidify the census of dwarf satellites of galaxies outside the …
Gaia eclipsing binary and multiple systems. Supervised classification and self-organizing maps
Rimoldini, L.; Holl, B.; Mowlavi, N. +6 more
Context. Large surveys producing tera- and petabyte-scale databases require machine-learning and knowledge discovery methods to deal with the overwhelming quantity of data and the difficulties of extracting concise, meaningful information with reliable assessment of its uncertainty. This study investigates the potential of a few machine-learning m…
Calibrating the Planck Cluster Mass Scale with Cluster Velocity Dispersions
Chary, Ranga-Ram; Stern, Daniel; Shim, Hyunjin +7 more
We measure the Planck cluster mass bias using dynamical mass measurements based on velocity dispersions of a subsample of 17 Planck-detected clusters. The velocity dispersions were calculated using redshifts determined from spectra that were obtained at the Gemini observatory with the GMOS multi-object spectrograph. We correct our estimates for ef…
Pushing the limits: detecting H2 emission from faint bipolar planetary nebulae in the IPHAS sample
Guerrero, M. A.; Santamaría, E.; Ramos-Larios, G. +1 more
We have obtained deep narrowband images in the near-infrared H2 λ2.122 µm emission line for a sample of 15 faint Isaac Newton Telescope Photometric H α Survey (IPHAS) bipolar planetary nebulae (PNe) to search for molecular material. H2 emission is found in most of them (14 out of 15), mostly associated with rings at the…