Search Publications
Missions
Journals
Publication Years
Artificial Intelligence-Assisted Inversion (AIAI) of Synthetic Type Ia Supernova Spectra
Wang, Lifan; Hu, Lei; Chen, Xingzhuo
We generate ∼100,000 model spectra of Type 1a supernovae (SNe Ia) to form a spectral library for the purpose of building an artificial intelligence-assisted inversion (AIAI) algorithm for theoretical models. As a first attempt, we restrict our studies to the time around B-band maximum and compute theoretical spectra with a broad spectral wavelengt…
Identifying new X-ray binary candidates in M31 using random forest classification
Barmby, P.; Vulic, N.; Arnason, R. M.
Identifying X-ray binary (XRB) candidates in nearby galaxies requires distinguishing them from possible contaminants including foreground stars and background active galactic nuclei. This work investigates the use of supervised machine learning algorithms to identify high-probability XRB candidates. Using a catalogue of 943 Chandra X-ray sources i…
A deep Chandra survey for faint X-ray sources in the Galactic globular cluster M30, and searches for optical and radio counterparts
Strader, Jay; Bahramian, Arash; Maccarone, Thomas J. +11 more
We present a deep (~330 ks) Chandra survey of the Galactic globular cluster M30 (NGC 7099). Combining the new Cycle 18 with the previous Cycle 3 observations we report a total of 10 new X-ray point sources within the 1${_{.}^{\prime}}$03 half-light radius, compiling an extended X-ray catalogue of a total of 23 sources. We incorporate imaging obser…
The assembly history of the nearest S0 galaxy NGC 3115 from its kinematics out to six half-light radii
Forbes, Duncan A.; Romanowsky, Aaron J.; Brodie, Jean P. +6 more
Using new and archival data, we study the kinematic properties of the nearest field S0 galaxy, NGC 3115, out to ∼6.5 half-light radii (Re) from its stars (integrated starlight), globular clusters (GCs), and planetary nebulae (PNe). We find evidence of three kinematic regions with an inner transition at ∼0.2 Re from a dispersi…
First Resolved Scattered-light Images of Four Debris Disks in Scorpius-Centaurus with the Gemini Planet Imager
Matthews, Brenda C.; Duchêne, Gaspard; Esposito, Thomas M. +57 more
We present the first spatially resolved scattered-light images of four debris disks around members of the Scorpius-Centaurus (Sco-Cen) OB association with high-contrast imaging and polarimetry using the Gemini Planet Imager (GPI). All four disks are resolved for the first time in polarized light, and one disk is also detected in total intensity. T…
Studies of the 2018/Mars Year 34 Planet-Encircling Dust Storm
Guzewich, S. D.; Fedorova, A. A.; Kahre, M. A. +1 more
Mars' planet-encircling or global dust storms (GDSs) are an iconic and enigmatic feature of the Red Planet. Occurring every few Mars Years (MYs), on average, they are a stochastic process in the otherwise largely repeatable annual cycle of martian weather. In 2018 (MY 34 in the calendar of Clancy et al. [2000],
VVV WIN 1733-3349: a low extinction window to probe the far side of the Milky Way bulge
Minniti, D.; Benjamin, R. A.; Saito, R. K. +5 more
Windows of low extinction in the Milky Way (MW) have been used along the past decades for the study of the Galactic structure and the stellar population across the inner bulge and disc. Here, we report the analysis of another low extinction near-IR window discovered by the VISTA Variables in the Vía Láctea Survey (VVV). VVV WIN 1733-3349 is about …
X-ray and γ-ray orbital variability from the γ-ray binary HESS J1832-093
Reimer, O.; Martí-Devesa, G.
Context.γ-ray binaries are systems composed of a massive star and a compact object whose interaction leads to particle acceleration up to relativistic energies. In the last fifteen years, a few binaries have been found to emit at high energies, but their number is still low. The TeV source HESS J1832-093 has been proposed as a binary candidate, al…
Thermal properties of large main-belt asteroids observed by Herschel PACS
Marton, G.; Müller, T. G.; Kiss, C. +11 more
Non-resolved thermal infrared observations enable studies of thermal and physical properties of asteroids via thermo-physical models provided the shape and rotational properties of the target are well determined. We used calibration-programme Herschel PACS data (70, 100, 160 µm) and state-of-the-art shape models derived from adaptive-optics …
IRIS Observations of the Low-atmosphere Counterparts of Active Region Outflows
Polito, Vanessa; Testa, Paola; De Pontieu, Bart +2 more
Active region (AR) outflows have been studied in detail since the launch of Hinode/EIS and are believed to provide a possible source of mass and energy to the slow solar wind. In this work, we investigate the lower atmospheric counterpart of AR outflows using observations from the Interface Region Imaging Spectrograph (IRIS). We find that the IRIS…