Search Publications
A Targeted Search for Variable Gravitationally Lensed Quasars
Schlegel, David J.; Huang, Xiaosheng; Palmese, Antonella +4 more
We present a pipeline to identify photometric variability within strong gravitationally lensing candidates, in the Dark Energy Spectroscopic Instrument Legacy Imaging Surveys. In our first paper, we laid out our pipeline and presented seven new gravitationally lensed supernovae candidates in a retrospective search. In this companion paper, we appl…
A Spatial Uniformity Check of Gaia DR3 Photometry and BP/RP Spectra
Huang, Bowen; Yuan, Haibo; Xiao, Kai
Gaia DR3 photometry and Blue Photometer (BP) and Red Photometer (RP) spectra have been widely used as reference in photometric calibrations. In this work, we check the spatial uniformity of Gaia DR3 photometry and BP/RP spectra by comparing the BP, RP, and G-band photometry with the synthetic ones from the BP/RP spectra. The discrepancies have a s…
Sigmoid Eruption Associated with the X9.3 Flare from AR 12673 Drives the Gradual Solar Energetic Particle Event on 2017 September 6
Brooks, David H.; Yardley, Stephanie L.
Large gradual solar energetic particle (SEP) events can pose a radiation risk to crewed spaceflight and a significant threat to near-Earth satellites; however, the origin of the SEP seed particle population, and how these particles are released, accelerated and transported into the heliosphere are not well understood. We analyze NOAA active region…
Erratum: "Inferences from Surface Brightness Fluctuations of Zwicky 3146 via the Sunyaev–Zel'dovich Effect and X-Ray Observations" (2023, ApJ, 951, 41)
Mroczkowski, Tony; Kraft, Ralph; Devlin, Mark +16 more
Refinement of Global Coronal and Interplanetary Magnetic Field Extrapolations Constrained by Remote-sensing and In Situ Observations at the Solar Minimum
Feng, Li; Gan, Weiqun; Shi, Guanglu +2 more
Solar magnetic fields are closely related to various physical phenomena on the Sun, which can be extrapolated with different models from photospheric magnetograms. However, the open flux problem (OFP), the underestimation of the magnetic field derived from the extrapolated model, is still unsolved. To minimize the impact of the OFP, we propose thr…
Solar Chromospheric Heating by Magnetohydrodynamic Waves: Dependence on the Inclination of the Magnetic Field
Shimizu, Toshifumi; Koyama, Mayu
A proposed mechanism for solar chromospheric heating is magnetohydrodynamic waves propagating upward along magnetic field lines and dissipating their energy in the chromosphere. In particular, compressible magnetoacoustic waves may contribute to the heating. Theoretically, the components below the cutoff frequency cannot propagate into the chromos…
NGC 7314: X-Ray Study of the Evolving Accretion Properties
Chang, Hsiang-Kuang; Chatterjee, Debjit; Jana, Arghajit +1 more
We present a comprehensive analysis of the timing and spectral properties of NGC 7314, a Seyfert 1.9 galaxy, using X-ray observations from XMM-Newton, NuSTAR, and RXTE/proportional counter array (PCA). The timing analysis reveals significant variability across different energy bands, with fractional variability values consistent with previous stud…
Evolution of the Ratio of Mg II Intensities during Solar Flares
Tripathi, Durgesh; Roy, Soumya
The Mg II k and h line intensity ratios can be used to probe the characteristics of the plasma in the solar atmosphere. In this study, using the observations recorded by the Interface Region Imaging Spectrometer, we study the variation of the Mg II k and h intensity ratio for three flares belonging to X-class, M-class, and C-class, throughout thei…
The Chemical Puzzle of Weak G-Band Stars: A Comprehensive Study of HD 54627, HD 105783, HD 198718, and HD 201557
Pereira, C. B.; Quispe-Huaynasi, F.; Holanda, N. +2 more
Weak G-band stars (WGBs) are a unique class of objects characterized by weak CH molecular lines in the Fraunhofer G band, indicative of a deficiency in 12C. This peculiar spectral feature is often accompanied by significant enrichments in N and, occasionally, Li and Na abundances. Despite their rarity and recent discoveries of new WGB c…
Formation of a Magnetic Cloud from the Merging of Two Successive Coronal Mass Ejections
Wang, Rui; Liu, Ying D.; Hu, Huidong +2 more
On 2022 March 28 two successive coronal mass ejections (CMEs) were observed by multiple spacecraft and resulted in a magnetic cloud (MC) at 1 au. We investigate the propagation and interaction properties of the two CMEs correlated with the MC using coordinated multipoint remote sensing and in situ observations from Solar Orbiter, STEREO-A, Solar a…