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Impulsive Coronal Heating from Large-scale Magnetic Rearrangements: From IRIS to SDO/AIA
Testa, Paola; Petralia, Antonino; Reale, Fabio +1 more
The Interface Region Imaging Spectrograph (IRIS) has observed bright spots at the transition region footpoints associated with heating in the overlying loops, as observed by coronal imagers. Some of these brightenings show significant blueshifts in the Si IV line at 1402.77 Å ({log}T[{{K}}]≈ 4.9). Such blueshifts cannot be reproduced by coronal lo…
Thermal properties of slowly rotating asteroids: results from a targeted survey
Geier, S.; Pál, A.; Thizy, O. +51 more
Context. Earlier work suggests that slowly rotating asteroids should have higher thermal inertias than faster rotators because the heat wave penetrates deeper into the subsurface. However, thermal inertias have been determined mainly for fast rotators due to selection effects in the available photometry used to obtain shape models required for the…
The Tail of PSR J0002+6216 and the Supernova Remnant CTB 1
Frail, D. A.; Kerr, M.; Schinzel, F. K. +2 more
We have carried out Very Large Array imaging and a Fermi timing analysis of the 115 ms γ-ray and radio pulsar PSR J0002+6216. We found that the pulsar lies at the apex of a narrowly collimated cometary-like 7‧ tail of nonthermal radio emission, which we identify as a bow-shock pulsar wind nebula. The tail of the nebula points back toward the geome…
Distinguishing circumstellar from stellar photometric variability in Eta Carinae
Gull, T. R.; Corcoran, M. F.; Madura, T. I. +14 more
The interacting binary Eta Carinae remains one of the most enigmatic massive stars in our Galaxy despite over four centuries of observations. In this work, its light curve from the ultraviolet to the near-infrared is analysed using spatially resolved HST observations and intense monitoring at the La Plata Observatory, combined with previously publ…
Mid-infrared spectroscopy of planetary analogs: A database for planetary remote sensing
Helbert, Joern; Hiesinger, Harald; Weber, Iris +4 more
The MERTIS (MErcury Radiometer and Thermal Infrared Spectrometer) instrument onboard the ESA/JAXA BepiColombo mission will provide mid-infrared data, which will be crucial to characterize the surface mineralogy of Mercury. In order to interpret the results, we are creating a database of mid-infrared spectra. As part of a study of synthetic glasses…
On the Origin of the Magnetic Energy in the Quiet Solar Chromosphere
Martínez-Sykora, Juan; De Pontieu, Bart; Carlsson, Mats +3 more
The presence of magnetic field is crucial in the transport of energy through the solar atmosphere. Recent ground-based and space-borne observations of the quiet Sun have revealed that magnetic field accumulates at photospheric heights, via a local dynamo or from small-scale flux emergence events. However, most of this small-scale magnetic field ma…
Young massive clusters in the interacting LIRG Arp 299: evidence for the dependence of star cluster formation and evolution on environment
Väisänen, P.; Ryder, S. D.; Randriamanakoto, Z. +1 more
Archival WFC3/UVIS imaging of Arp 299 (NGC 3690E+ NGC 3690W) is retrieved to investigate the young massive cluster (YMC) population of this ongoing merger. We extract 2182 cluster candidates, including 1323 high confidence photometric sources. Multiband photometry is matched with Yggdrasil models to estimate the age, mass, and extinction of each c…
Homogeneity of 67P/Churyumov-Gerasimenko as seen by CONSERT: implication on composition and formation
Blum, J.; Vincent, J. -B.; Kofman, W. +3 more
Context. After the landing of Philae, CONSERT probed the nucleus of 67P/Churyumov-Gerasimenko (67P) and observed no heterogeneities at metric scale within the probed part of the small lobe of 67P. Further studies have then quantified the observed homogeneity in terms of maximum permittivity contrast versus the typical size of heterogeneities.
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The PLATO Solar-like Light-curve Simulator. A tool to generate realistic stellar light-curves with instrumental effects representative of the PLATO mission
Smith, A. M. S.; Samadi, R.; Lebreton, Y. +10 more
Context. ESA's PLATO space mission, to be launched by the end of 2026, aims to detect and characterise Earth-like planets in their habitable zone using asteroseismology and the analysis of the transit events. The preparation of science objectives will require the implementation of hare-and-hound exercises relying on the massive generation of repre…
Fluids mobilization in Arabia Terra, Mars: Depth of pressurized reservoir from mounds self-similar clustering
Massironi, Matteo; Cremonese, Gabriele; Pondrelli, Monica +4 more
Arabia Terra is a region of Mars where signs of past-water occurrence are recorded in several landforms. Broad and local scale geomorphological, compositional and hydrological analyses point towards pervasive fluid circulation through time. In this work we focus on mound fields located in the interior of three casters larger than 40 km (Firsoff, K…