Search Publications
Missions
Journals
Publication Years
Transients from the Cataclysmic Deaths of Cataclysmic Variables
Strader, Jay; Chomiuk, Laura; Shen, Ken J. +2 more
We explore the observational appearance of the merger of a low-mass star with a white dwarf (WD) binary companion. We are motivated by recent work finding that multiple tensions between the observed properties of cataclysmic variables (CVs) and standard evolution models are resolved if a large fraction of CV binaries merge as a result of unstable …
Large-scale asymmetry in galaxy spin directions: evidence from the Southern hemisphere
Shamir, Lior
Recent observations using several different telescopes and sky surveys showed patterns of asymmetry in the distribution of galaxies by their spin directions as observed from Earth. These studies were done with data imaged from the Northern hemisphere, showing excellent agreement between different telescopes and different analysis methods. Here, da…
A Wide Planetary Mass Companion Discovered through the Citizen Science Project Backyard Worlds: Planet 9
Debes, John H.; Gonzales, Eileen C.; Meisner, Aaron M. +22 more
Through the Backyard Worlds: Planet 9 citizen science project we discovered a late-type L dwarf co-moving with the young K0 star BD+60 1417 at a projected separation of 37″ or 1662 au. The secondary-CWISER J124332.12+600126.2 (W1243)-is detected in both the CatWISE2020 and 2MASS reject tables. The photometric distance and CatWISE proper motion bot…
Flare-forecasting Algorithms Based on High-gradient Polarity Inversion Lines in Active Regions
Piana, Michele; Benvenuto, Federico; Cicogna, Domenico +6 more
Solar flares emanate from solar active regions hosting complex and strong bipolar magnetic fluxes. Estimating the probability of an active region to flare and defining reliable precursors of intense flares are extremely challenging tasks in the space weather field. In this work, we focus on two metrics as flare precursors, the unsigned flux R, tes…
A Layered Debris Disk around M Star TWA 7 in Scattered Light
Stark, Christopher C.; Debes, John H.; Roberge, Aki +15 more
We have obtained Hubble Space Telescope (HST) coronagraphic observations of the circumstellar disk around M star TWA 7 using the Space Telescope Imaging Spectrograph (STIS) instrument in visible light. Together with archival observations, including HST/NICMOS using the F160W filter and Very Large Telescope/SPHERE at the H-band in polarized light, …
Measurement of Magnetic Field Fluctuations in the Parker Solar Probe and Solar Orbiter Missions
Maksimovic, M.; Bale, S. D.; Krasnoselskikh, V. +17 more
The search coil magnetometer (SCM) measures the magnetic signature of solar wind fluctuations with three components in the 3 Hz-50 kHz range and one single component in the 1 kHz-1 MHz range. This instrument is important for providing in situ observations of transients caused by interplanetary shocks and reconnection, for the identification of ele…
The dust mass in Cassiopeia A from infrared and optical line flux differences
De Looze, I.; Barlow, M. J.; Milisavljevic, D. +2 more
The large quantities of dust that have been found in a number of high-redshift galaxies have led to suggestions that core-collapse supernovae (CCSNe) are the main sources of their dust and have motivated the measurement of the dust masses formed by local CCSNe. For Cassiopeia A (Cas A), an oxygen-rich remnant of a Type IIb CCSN, a dust mass of 0.6…
The Nuclear Star Cluster and Nuclear Stellar Disk of the Milky Way: Different Stellar Populations and Star Formation Histories
Neumayer, Nadine; Schödel, Rainer; Nogueras-Lara, Francisco
The Milky Way's nuclear stellar disk (NSD) and nuclear star cluster (NSC) are the main features of the Galactic center. Nevertheless, their observation is hampered by the extreme source crowding and high extinction. Hence, their relation and formation scenario are not fully clear yet. We aim to detect the stellar populations from the NSC and the N…
The rapid transition from star formation to AGN-dominated rest-frame ultraviolet light at z ≃ 4
Häußler, B.; Bowler, R. A. A.; Jarvis, M. J. +1 more
With the advent of deep optical-to-near-infrared extragalactic imaging on the degree scale, samples of high-redshift sources are being selected that contain both bright star-forming (SF) galaxies and faint active galactic nuclei (AGN). In this study, we investigate the transition between SF- and AGN-dominated systems at z ≃ 4 in the rest-frame ult…
Fast infrared variability from the black hole candidate MAXI J1535-571 and tight constraints on the modelling
Vincentelli, F. M.; Casella, P.; Maccarone, T. +7 more
We present the results regarding the analysis of the fast X-ray/infrared (IR) variability of the black hole transient MAXI J1535-571. The data studied in this work consist of two strictly simultaneous observations performed with XMM-Newton (X-rays: 0.7-10 keV), VLT/HAWK-I (Ks band, 2.2 µm) and VLT/VISIR (M and PAH2_2 bands, 4.85 a…