Search Publications
The Power of High-precision Broadband Photometry: Tracing the Milky Way Density Profile with Blue Horizontal Branch Stars in the Dark Energy Survey
Lewis, Geraint F.; Erkal, Denis; Bland-Hawthorn, Joss +9 more
Blue horizontal branch stars (BHBs), excellent distant tracers for probing the Milky Way's halo density profile, are distinguished in the
Turbulence, and Proton and Electron Heating Rates in the Solar Corona: Analytical Approach
Telloni, Daniele; Zank, Gary P.; Adhikari, Laxman +5 more
Analytical solutions for 2D and slab turbulence energies in the solar corona are presented, including a derivation of the corresponding correlation lengths, with implications for the proton and electron temperatures in the solar corona. These solutions are derived by solving the transport equations for 2D and slab turbulence energies and their cor…
A Case Study of Gas Impacted by Black-hole Jets with the JWST: Outflows, Bow Shocks, and High Excitation of the Gas in the Galaxy IC 5063
Malkan, Matthew; Armus, Lee; Spinoglio, Luigi +8 more
We present James Webb Space Telescope MIRI data of the inner ∼3 × 2 kpc2 of the galaxy IC 5063, in which the jets of a supermassive black hole interact with the gaseous disk they are crossing. Jet-driven outflows were known to be initiated along or near the jet path and to modify the stability of molecular clouds, possibly altering thei…
Investigating Model Dependencies for Obscured Active Galactic Nuclei: A Case Study of NGC 3982
Ricci, Claudio; Boorman, Peter G.; Kallová, Kristína
X-ray spectroscopy of heavily obscured active galactic nuclei (AGN) offers a unique opportunity to study the circumnuclear environment of accreting supermassive black holes. However, individual models describing the obscurer have unique parameter spaces that give distinct parameter posterior distributions when fit to the same data. To assess the i…
Analysis of BMR Tilt from AutoTAB Catalog: Hinting toward the Thin Flux Tube Model?
Banerjee, Dipankar; Sreedevi, Anu; Jha, Bibhuti Kumar +1 more
One of the intriguing mechanisms of the Sun is the formation of bipolar magnetic regions (BMRs) in the solar convection zone (CZ), which are observed as regions of concentrated magnetic fields of opposite polarity on the photosphere. These BMRs are tilted with respect to the equatorial line, which statistically increases with latitude. The thin fl…
Identifying H I Emission and UV Absorber Associations near the Magellanic Stream
Putman, Mary E.; Zheng, Yong; Kim, Doyeon A.
We present a new technique to identify associations of H I emission in the Magellanic Stream (MS) and ultraviolet (UV) absorbers from 92 QSO sight lines near the MS. We quantify the level of associations of individual H I elements to the main H I body of the Stream using Wasserstein distance-based models, and derive characteristic spatial and kine…
Detection of a 2.85 µm Feature on Five Spinel-rich Asteroids from JWST
Ehlmann, Bethany L.; de Kleer, Katherine; Gomez Barrientos, Jonathan +2 more
Ground-based observations of "Barbarian" L-type asteroids at 1–2.5 µm indicate that their near-infrared spectra are dominated by the mineral spinel, which has been attributed to a high abundance of calcium-aluminum inclusions (CAIs)—the first solids to condense out of the protoplanetary disk during the formation of the solar system. However,…
The Optical to Infrared 0.6–5.3 µm Dust Extinction Law of the Milky Way with JWST NIRSpec: Westerlund 2
Wang, Shu; Chen, Xiaodian
The interstellar extinction law is important for interpreting observations and inferring the properties of interstellar dust grains. Based on the 993 prism/CLEAR spectra from the James Webb Space Telescope (JWST), we investigate the 0.6–5.3 µm interstellar dust extinction law. We propose a pair method to obtain the reddening curves based onl…
The Interplay between the Disk and Corona of the Changing-look Active Galactic Nucleus 1ES 1927+654
Ho, Luis C.; Ricci, Claudio; Trakhtenbrot, Benny +4 more
Time-domain studies of active galactic nuclei (AGNs) offer a powerful tool for understanding black hole accretion physics. Prior to the optical outburst on 2017 December 23, 1ES 1927+654 was classified as a "true" type 2 AGN, an unobscured source intrinsically devoid of broad-line emission in polarized spectra. Through our 3 yr monitoring campaign…
Radio-only and Radio-to-far-ultraviolet Spectral Energy Distribution Modeling of 14 ULIRGs: Insights into the Global Properties of Infrared Bright Galaxies
Díaz-Santos, Tanio; Małek, Katarzyna; Dey, Subhrata +1 more
We present detailed spectral energy distribution (SED) modeling of 14 local ultraluminous infrared galaxies (ULIRGs) with outstanding photometric data from the literature covering the ultraviolet–infrared (FIR) and radio bands (∼50 MHz to ∼30 GHz). We employ the CIGALE SED fitting code to model the ultraviolet–FIR–radio SED. For the radio-only SED…