Search Publications
High-resolution Hubble Space Telescope Imaging Survey of Local Star-forming Galaxies. I. Spatially Resolved Obscured Star Formation with Hα and Paschen-β Recombination Lines
Perna, Michele; Calzetti, Daniela; Colina, Luis +9 more
We present a sample of 24 local star-forming galaxies observed with broadband and narrowband photometry from the Hubble Space Telescope (HST) that are part of the Great Observatories All-sky Luminous Infrared Galaxies Survey of local luminous and ultraluminous infrared galaxies. With narrowband filters around the emission lines Hα (and [N II]) and…
Photometric Metallicity Prediction of Fundamental-mode RR Lyrae Stars in the Gaia Optical and K s Infrared Wave Bands by Deep Learning
Grebel, Eva K.; Dékány, István
RR Lyrae stars are useful chemical tracers thanks to the empirical relationship between their heavy-element abundance and the shape of their light curves. However, the consistent and accurate calibration of this relation across multiple photometric wave bands has been lacking. We have devised a new method for the metallicity estimation of fundamen…
To E or Not to E : Numerical Nuances of Global Coronal Models
Poedts, Stefaan; Perri, Barbara; Lani, Andrea +2 more
In recent years, global coronal models have experienced an ongoing increase in popularity as tools for forecasting solar weather. Within the domain of up to 21.5 R ⊙, magnetohydrodynamics (MHD) is used to resolve the coronal structure using magnetograms as inputs at the solar surface. Ideally, these computations would be repeated with e…
Morpho-kinematic Properties of Wolf-Rayet Planetary Nebulae
Danehkar, A.
The majority of planetary nebulae (PNs) show axisymmetric morphologies, whose causes are not well understood. In this work, we present spatially resolved kinematic observations of 14 Galactic PNs surrounding Wolf-Rayet ([WR]) and weak emission-line stars (wels), based on the Hα and [N II] emission taken with the Wide Field Spectrograph on the Aust…
The First Insight-HXMT Gamma-Ray Burst Catalog: The First Four Years
Li, Gang; Ge, Ming-Yu; Ma, Xiang +40 more
The Hard X-ray Modulation Telescope (Insight-HXMT) is China's first X-ray astronomy satellite. It was launched on 2017 June 15. The anticoincidence CsI detectors of the High Energy X-ray telescope (HE) on board Insight-HXMT could serve as an all-sky gamma-ray monitor in about 0.2-3 MeV. In its first four years of operation, Insight-HXMT has detect…
In-orbit Timing Calibration of the Insight-Hard X-Ray Modulation Telescope
Zhang, Shu; Li, Xiaobo; Zhang, Shuang-Nan +24 more
We describe the timing system and the timing calibration results of the three payloads on board the Insight-Hard X-ray Modulation Telescope (Insight-HXMT). These three payloads are the High Energy X-ray telescope (HE; 20-250 keV), the Medium Energy X-ray telescope (ME; 5-30 keV), and the Low Energy X-ray telescope (LE; 1-10 keV). We present a meth…
Characteristics of Kepler Eclipsing Binaries Displaying a Significant O'Connell Effect
Perlman, Eric S.; Caballero-Nieves, Saida M.; Knote, Matthew F. +2 more
The O'Connell effect-the presence of unequal maxima in eclipsing binaries-remains an unsolved riddle in the study of close binary systems. The Kepler space telescope produced high-precision photometry of nearly 3000 eclipsing binary systems, providing a unique opportunity to study the O'Connell effect in a large sample and in greater detail than i…
Stellar Flyby Analysis for Spiral Arm Hosts with Gaia DR3
Dong, Ruobing; De Rosa, Robert J.; Pueyo, Laurent +5 more
Scattered-light imaging studies have detected nearly two dozen spiral arm systems in circumstellar disks, yet the formation mechanisms for most of them are still under debate. Although existing studies can use motion measurements to distinguish leading mechanisms such as planet-disk interaction and disk self-gravity, close-in stellar flybys can in…
Linking Extragalactic Transients and Their Host Galaxy Properties: Transient Sample, Multiwavelength Host Identification, and Database Construction
French, K. Decker; Zabludoff, Ann; Behroozi, Peter +7 more
Understanding the preferences of transient types for host galaxies with certain characteristics is key to studies of transient physics and galaxy evolution, as well as to transient identification and classification in the LSST era. Here we describe a value-added database of extragalactic transients-supernovae, tidal disruption events, gamma-ray bu…
The Dark Energy Survey Bright Arcs Survey: Candidate Strongly Lensed Galaxy Systems from the Dark Energy Survey 5000 Square Degree Footprint
Bechtol, K.; Smith, M.; Abbott, T. M. C. +79 more
We report the combined results of eight searches for strong gravitational lens systems in the full 5000 square degrees of Dark Energy Survey (DES) observations. The observations accumulated by the end of the third observing season fully covered the DES footprint in five filters (grizY), with an i-band limiting magnitude (at 10σ) of 23.44. In four …