Search Publications
PSR B0656+14: the unified outlook from the infrared to X-rays
Geier, S.; Mennickent, R. E.; Cabrera-Lavers, A. +4 more
We report detection of PSR B0656+14 with the Gran Telescopio Canarias in narrow optical F657, F754, F802, and F902 and near-infrared JHKs bands. The pulsar detection in the Ks band extends its spectrum to 2.2 $\mu$m and confirms its flux increase towards the infrared. We also present a thorough analysis of the optical spectru…
Probing the Astrometric Properties of Gaia EDR3 Quasars at the Faintest Magnitudes
Liao, Shilong; Qi, Zhaoxiang; Tang, Zhenghong +3 more
Gaia early data release 3 (EDR3) provides about 1.6 million QSO-like objects. Measuring the systematic residuals of the quasars convincingly in Gaia EDR3 is paramount for further fundamental astronomy use. We aim to conduct an independent assessment of the astrometric quality of Gaia EDR3 utilizing a sizable and confirmed extragalactic sources cat…
A confined dynamo: Magnetic activity of the K-dwarf component in the pre-cataclysmic binary system V471 Tauri
Kriskovics, L.; Oláh, K.; Borkovits, T. +6 more
Context. Late-type stars in close binary systems can exhibit strong magnetic activity owing to rapid rotation supported by tidal locking. On the other hand, tidal coupling may suppress the differential rotation which is a key ingredient of the magnetic dynamo.
Aims: We studied the red dwarf component in the eclipsing binary system V471 Tau in…
Maximum helium content of multiple populations in the globular cluster NGC 6752
Martins, F.; Charbonnel, C.; Chantereau, W.
Context. Multiple populations in globular clusters are usually explained by the formation of stars out of material with a chemical composition that is polluted to different degrees by the ejecta of short-lived, massive stars. But the nature of the "polluters" remains elusive. Different types of stars have been proposed to account for the observed …
Central kinematics of the Galactic globular cluster M80
Weilbacher, Peter M.; Kamann, Sebastian; Dreizler, Stefan +7 more
We use spectra observed with the integral-field spectrograph Multi Unit Spectroscopic Explorer (MUSE) to reveal the central kinematics of the Galactic globular cluster Messier 80 (M80, NGC 6093). Using observations obtained with the recently commissioned narrow-field mode of MUSE, we are able to analyse 932 stars in the central 7.5 arcsec by 7.5 a…
Investigating three Sirius-like systems with SPHERE
Rouan, D.; Ménard, F.; Avenhaus, H. +61 more
Context. Sirius-like systems are relatively wide binaries with a separation from a few to hundreds of au; they are composed of a white dwarf (WD) and a companion of a spectral type earlier than M0. Here we consider main sequence (MS) companions, where the WD progenitor evolves in isolation, but its wind during the former asymptotic giant branch (A…
HAT-P-58b-HAT-P-64b: Seven Planets Transiting Bright Stars
Torres, Guillermo; Sato, B.; Hébrard, G. +31 more
We report the discovery and characterization of seven transiting exoplanets from the HATNet survey. The planets, which are hot Jupiters and Saturns transiting bright Sun-like stars, include: HAT-P-58b (with mass Mp = 0.37 MJ, radius Rp = 1.33 RJ, and orbital period P = 4.0138 days), HAT-P-59b (Mp
Asteroid Observations from the Transiting Exoplanet Survey Satellite: Detection Processing Pipeline and Results from Primary Mission Data
Pál, András; Vaillancourt, John E.; Kotson, Michael C. +7 more
The Transiting Exoplanet Survey Satellite (TESS) is a NASA Explorer-class mission designed for finding exoplanets around nearby stars. TESS image data can also serve as a valuable resource for asteroid and comet detection, including near-Earth objects (NEOs). In order to exploit the TESS image data for moving object detection and potential object …
Concurrent empirical magnetic reconstruction of storm and substorm spatial scales using data mining and virtual spacecraft
Stephens, Grant K.; Sitnov, Mikhail I.
Data-mining (DM) has ushered in a new era of empirical magnetic reconstructions of the 4 magnetosphere via application of the k-nearest neighbors (kNN) method. In this approach, 5 the combined magnetosphere storm-substorm state is characterized by the Sym-H and AL IMF 6 indices, their time derivatives, and the solar wind electric field vBz . Howev…
Toward a More Complex Understanding of Natal Super Star Clusters with Multiwavelength Observations
Johnson, Kelsey E.; Indebetouw, Remy; Brogan, Crystal L. +3 more
Henize 2-10 (He 2-10) is a nearby (D = 9 Mpc) starbursting blue compact dwarf galaxy that boasts a high star formation rate and a low-luminosity active galactic nucleus. He 2-10 is also one of the first galaxies in which embedded super star clusters (SSCs) were discovered. SSCs are massive, compact star clusters that will impact their host galaxie…