Search Publications
Missions
Journals
Publication Years
Multipoint Observations of the June 2012 Interacting Interplanetary Flux Ropes
Poedts, Stefaan; Futaana, Yoshifumi; Palmerio, Erika +10 more
In this paper we perform a detailed analysis of interplanetary flux ropes observed between June 15-17, 2012 at Venus and subsequently at Earth's Lagrange L1 point, while the observation points were separated by about 0.28 AU in radial distance and 5° in heliographic longitude. The flux ropes were associated with coronal mass ejections (CMEs) that …
Gaia-DR2 extended kinematical maps . I. Method and application
López-Corredoira, M.; Sylos Labini, F.
Context. The Gaia Collaboration has used Gaia-DR2 sources with six-dimensional (6D) phase space information to derive kinematical maps within 5 kpc of the Sun, which is a reachable range for stars with relative error in distance lower than 20%.
Aims: Here we aim to extend the range of distances by a factor of two to three, thus adding the ran…
Short-duration Stellar Flares in GALEX Data
Brasseur, C. E.; Osten, Rachel A.; Fleming, Scott W.
We report on a population of short-duration near-ultraviolet (NUV) flares in stars observed by the Kepler and Galaxy Evolution Explorer (GALEX) missions. We analyzed the NUV light curves of 34,276 stars observed from 2009 to 2013 by both the GALEX (NUV) and Kepler (optical) space missions with the eventual goal of investigating multiwavelength fla…
Origin of the Extended Mars Radar Blackout of September 2017
Leblanc, François; Witasse, Olivier; Sánchez-Cano, Beatriz +13 more
The Mars Advanced Radar for Subsurface and Ionosphere Sounding (MARSIS) onboard Mars Express, which operates between 0.1 and 5.5 MHz, suffered from a complete blackout for 10 days in September 2017 when observing on the nightside (a rare occurrence). Moreover, the Shallow Radar (SHARAD) onboard the Mars Reconnaissance Orbiter, which operates at 20…
Geometry, Kinematics, and Heliospheric Impact of a Large CME-driven Shock in 2017 September
Liu, Ying D.; Zhao, Xiaowei; Zhu, Bei
A powerful coronal mass ejection (CME) occurred on 2017 September 10 near the end of the declining phase of the historically weak solar cycle 24. We obtain new insights concerning the geometry and kinematics of CME-driven shocks in relation to their heliospheric impacts from the optimal, multispacecraft observations of the eruption. The shock, whi…
Thermal Infrared Imaging of MWC 758 with the Large Binocular Telescope: Planetary-driven Spiral Arms?
Dong, Ruobing; Wagner, Kevin; Ertel, Steve +5 more
Theoretical studies suggest that a giant planet around the young star MWC 758 could be responsible for driving the spiral features in its circumstellar disk. Here, we present a deep imaging campaign with the Large Binocular Telescope with the primary goal of imaging the predicted planet. We present images of the disk in two epochs in the L‧ filter…
Star Formation Histories of the LEGUS Dwarf Galaxies. III. The Nonbursty Nature of 23 Star-forming Dwarf Galaxies
Cignoni, M.; Tosi, M.; Sabbi, E. +15 more
We derive the recent star formation histories (SFHs) of 23 active dwarf galaxies using Hubble Space Telescope observations from the Legacy Extragalactic UV Survey. We apply a color-magnitude diagram (CMD) fitting technique using two independent sets of stellar models, PARSEC-COLIBRI and MIST. Despite the nonnegligible recent activity, none of the …
Photometric Redshift Calibration Requirements for WFIRST Weak-lensing Cosmology: Predictions from CANDELS
Mobasher, Bahram; Rhodes, Jason; Capak, Peter +7 more
In order for the Wide-Field Infrared Survey Telescope (WFIRST) and other stage IV dark energy experiments (e.g., Large Synoptic Survey Telescope, LSST; and Euclid) to infer cosmological parameters not limited by systematic errors, accurate redshift measurements are needed. This accuracy can be met by using spectroscopic subsamples to calibrate the…
Dissecting bombs and bursts: non-LTE inversions of low-atmosphere reconnection in SST and IRIS observations
Carlsson, M.; Rouppe van der Voort, L. H. M.; de la Cruz Rodríguez, J. +3 more
Ellerman bombs and UV bursts are transient brightenings that are ubiquitously observed in the lower atmospheres of active and emerging flux regions. As they are believed to pinpoint sites of magnetic reconnection in reconfiguring fields, understanding their occurrence and detailed evolution may provide useful insight into the overall evolution of …
Swift UVOT near-UV transit observations of WASP-121 b
Schmitt, J. H. M. M.; Czesla, S.; Salz, M. +3 more
Close-in gas planets are subject to continuous photoevaporation that can erode their volatile envelopes. Today, ongoing mass loss has been confirmed in a few individual systems via transit observations in the ultraviolet spectral range. We demonstrate that the Ultraviolet/Optical Telescope (UVOT) onboard the Neil Gehrels Swift Observatory enables …