Search Publications
Missions
Journals
Publication Years
Observation of solar coronal heating powered by magneto-acoustic oscillations in a moss region
Ji, Kai-Fan; Hashim, Parida; Hong, Zhen-Xiang +3 more
In this paper, we report the observed temporal correlation between extreme-ultraviolet (EUV) emission and magneto-acoustic oscillations in an EUV moss region, which is the footpoint region only connected by magnetic loops with million-degree plasma. The result is obtained from a detailed multi-wavelength data analysis of the region with the purpos…
Measuring Young Stars in Space and Time. II. The Pre-main-sequence Stellar Content of N44
Gennaro, Mario; Dolphin, Andrew E.; Klessen, Ralf S. +9 more
The Hubble Space Telescope survey Measuring Young Stars in Space and Time (MYSST) entails some of the deepest photometric observations of extragalactic star formation, capturing even the lowest-mass stars of the active star-forming complex N44 in the Large Magellanic Cloud. We employ the new MYSST stellar catalog to identify and characterize the c…
Io's SO2 atmosphere from HST Lyman-α images: 1997 to 2018
Giono, Gabriel; Roth, Lorenz
The atmosphere of Jupiter's volcanic moon Io consists of mainly sulfur dioxide (SO2), and this main constituent has been studied with a variety of observing techniques across many wavelengths over the years. Here we study absorption by SO2 at the hydrogen Ly-α line (1216 Å) in a large set of images taken by the Space Telescop…
The infrared excess emission from nearby Gaia DR2 M dwarfs
Song, Inseok; Sgro, Lauren A.
We use Gaia DR2 data to search for M dwarfs with infrared (IR) excess, within 100 pc. By cross-matching Gaia with AllWISE and 2MASS catalogues, we select a subset of K/M dwarfs with reliable photometric data in both the optical and near-to-mid IR. Using our SED fitting pipeline, we determine a photospheric model for each star and determine its sig…
Limits on the presence of planets in systems with debris discs: HD 92945 and HD 107146
Henning, T.; Messina, S.; D'Orazi, V. +38 more
Recent observations of resolved cold debris discs at tens of au have revealed that gaps could be a common feature in these Kuiper-belt analogues. Such gaps could be evidence for the presence of planets within the gaps or closer in near the edges of the disc. We present SPHERE observations of HD 92945 and HD 107146, two systems with detected gaps. …
A Perspective on the Scaling of Magnetosheath Turbulence and Effects of Bow Shock Properties
Voitcu, Gabriel; Echim, Marius; Teodorescu, Eliza
We analyze magnetic field data from two magnetosheath crossings, representative of a larger collection of similar cases in the database of the Cluster spacecraft. We apply a novel data analysis method to identify the power-law behavior of the structure functions and to find the validity range of the power-law scaling. We validate the technique wit…
The BIG X-ray tail
Churazov, Eugene; Jones, Christine; Fossati, Matteo +9 more
Galaxy clusters grow primarily through the continuous accretion of group-scale haloes. Group galaxies experience preprocessing during their journey into clusters. A star-bursting compact group, the Blue Infalling Group (BIG), is plunging into the nearby cluster A1367. Previous optical observations reveal rich tidal features in the BIG members, and…
IKT 16 aka PSR J0058-7218: discovery of a 22 ms energetic rotation-powered pulsar in the Small Magellanic Cloud
Haberl, F.; Tiengo, A.; Filipović, M. D. +5 more
We report here on the discovery with XMM-Newton of pulsations at 22 ms from the central compact source associated with IKT 16, a supernova remnant in the Small Magellanic Cloud (SMC). The measured spin period and spin period derivative correspond to 21.7661076(2) ms and 2.9(3) × 10-14 s s-1, respectively. Assuming standard sp…
Eclipsing Binaries in the Open Cluster Ruprecht 147. IV: The Active Triple System EPIC 219511354
Torres, Guillermo; Vanderburg, Andrew; Gaidos, Eric +2 more
We report follow-up spectroscopic observations of the 1.62 day, K-type, detached, active, near-circular, double-lined eclipsing binary EPIC 219511354 in the open cluster Ruprecht 147, identified previously on the basis of photometric observations from the Kepler/K2 mission. This is the fourth eclipsing system analyzed in this cluster. A combined a…
The 2017 May 20 stellar occultation by the elongated centaur (95626) 2002 GZ32
Mottola, S.; Charmandaris, V.; Alvarez-Candal, A. +56 more
We predicted a stellar occultation of the bright star Gaia DR1 4332852996360346368 (UCAC4 385-75921) (mV = 14.0 mag) by the centaur 2002 GZ32 for 2017 May 20. Our latest shadow path prediction was favourable to a large region in Europe. Observations were arranged in a broad region inside the nominal shadow path. Series of ima…