Search Publications
Missions
Journals
Publication Years
Weak secondary cyclotron line in eclipsing high-mass X-ray binary Cen X-3
Misra, Ranjeev; Dangal, Pravat; Chakradhari, N. K. +1 more
We report the time-resolved spectroscopy results from two observations of Centaurus X-3, over one binary orbit with AstroSat and two binary orbits with Nuclear Spectroscopic Telescope Array (NuSTAR). NuSTAR covered two intensity states where the light curve showed transition in count rate from first to second binary orbit by a factor of ~3. A phen…
Switchback Patches Evolve into Microstreams via Magnetic Relaxation
Velli, Marco; Owen, Christopher J.; Kasper, Justin +5 more
Switchbacks, defined as Alfvénic reversals in magnetic field polarity, can dissipate their magnetic energy with heliocentric distance. To further investigate this, two distinct solar wind parcels tracing back to a similar solar source region were examined during a radial alignment between Parker Solar Probe (@25.8RS) and Solar Orbiter (@152RS). Th…
A Broad Line-width, Compact, Millimeter-bright Molecular Emission Line Source near the Galactic Center
Morris, Mark R.; Smith, Howard A.; Caselli, Paola +37 more
A compact source, G0.02467–0.0727, was detected in Atacama Large Millimeter/submillimeter Array 3 mm observations in continuum and very broad line emission. The continuum emission has a spectral index α ≈ 3.3, suggesting that the emission is from dust. The line emission is detected in several transitions of CS, SO, and SO2 and exhibits …
Analyzing JWST/NIRSpec Hydrogen Line Detections at TWA 27B: Constraining Accretion Properties and Geometry
Hashimoto, Jun; Marleau, Gabriel-Dominique; Aoyama, Yuhiko
Hydrogen lines from forming planets are crucial for understanding planet formation. However, the number of planetary hydrogen line detections is still limited. Recent JWST/NIRSpec observations have detected Paschen and Brackett hydrogen lines at TWA 27 B (2M1207b). Although classified as a planetary- mass companison (PMC) rather than a planet due …
Quantifying the diffusion of suprathermal electrons by whistler waves between 0.2 and 1 AU with Solar Orbiter and Parker Solar Probe
Maksimovic, M.; Kretzschmar, M.; Berthomier, M. +7 more
Context. The evolution of the solar wind electron distribution function with heliocentric distance exhibits different features that are still unexplained, in particular, the fast decrease in the electron heat flux and the increase in the Strahl pitch angle width. Wave-particle interactions between electrons and whistler waves are often proposed to…
Symbiotic stars in X-rays: IV. XMM-Newton, Swift, and TESS observations
Nuñez, N. E.; Mukai, K.; Sokoloski, J. L. +7 more
White dwarf symbiotic binaries are detected in X-rays with luminosities in the range of 1030–1034 ergs s‑1. Their X-ray emission arises either from the accretion disk boundary layer, from a region where the winds from both components collide, or from nuclear burning on the surface of the white dwarf (WD). In our co…
An Empirical Extinction Curve Revealed by Gaia XP Spectra and LAMOST
Zhang, Xiangyu; Wang, Tao; Huang, Bowen +4 more
We present a direct measurement of extinction curves using corrected Gaia XP spectra of the common sources in Gaia DR3 and LAMOST DR7. Our analysis of approximately 370,000 high-quality samples yielded a high-precision average extinction curve for the Milky Way. After incorporating infrared photometric data from Two Micron All Sky Survey and Wide-…
The TESS-Keck Survey. VII. A Superdense Sub-Neptune Orbiting TOI-1824
Batalha, Natalie M.; Mayo, Andrew W.; Rice, Malena +35 more
We confirm a massive sub-Neptune-sized planet on a P = 22.8 days orbit around the star TOI-1824 (T eff = 5200 K, V = 9.7 mag). TESS first identified TOI-1824 b (formerly TOI-1824.01) as an object of interest in 2020 April after two transits in Sector 22 were matched with a single transit in Sector 21. TOI-1824 was subsequently targeted …
AWSoM Magnetohydrodynamic Simulation of a Solar Active Region. II. Statistical Analysis of Alfvén Wave Dissipation and Reflection, Scaling Laws, and Energy Budget on Coronal Loops
Landi, Enrico; van der Holst, Bart; Manchester, Ward +6 more
The coronal heating problem has been a major challenge in solar physics, and a tremendous amount of effort has been made over the past several decades to solve it. In this paper, we aim at answering how the physical processes behind the Alfvén wave turbulent heating adopted in the Alfvén Wave Solar atmosphere Model (AWSoM) unfold in individual pla…
GAUSSN: Bayesian time-delay estimation for strongly lensed supernovae
Arendse, Nikki; Grayling, Matthew; Dhawan, Suhail +3 more
We present GAUSSN, a Bayesian semiparametric Gaussian Process (GP) model for time-delay estimation with resolved systems of gravitationally lensed supernovae (glSNe). GAUSSN models the underlying light curve non-parametrically using a GP. Without assuming a template light curve for each SN type, GAUSSN fits for the time delays of all images using …