53 citations · 161 across the 20 of their papers we have counts for
7 papers · 1 filter
Danger Zone: Establishing Buffers for Enhanced Classification in BPT Diagrams
Changhyun Cho, Ahmad Nemer, Ivan Yu. Katkov +1
This study utilizes unsupervised machine learning, specifically the uniform manifold approximation and projection (UMAP) algorithm, to classify optical spectra originating from sta…
Low-energy Radio Bursts from Magnetar XTE J1810197: Implications for Fast Radio Bursts
Banshi Lal, Yogesh Maan, Moaz Abdelmaguid +3
Magnetars are the leading candidate sources of fast radio bursts (FRBs). However, the observational probes of the connections between magnetars and FRBs are severely limited by the…
Evidence of an Energetic Magnetar Powering 1LHAASO J05004454
J. A. J. Alford, J. D. Gelfand, M. Abdelmaguid +1
We investigate the origin of unidentified, extended TeV source 1LHAASO J05004454, considering three possible origins: cosmic rays interacting with a molecular cloud (MC), partic…
The Timing Evolution of the Magnetar Swift J1818.0-1607 During a Period of Reduced Activity
Moaz Abdelmaguid, Paulo C. C. Freire, Joseph D. Gelfand +3
We report results from an observational campaign of the radio-loud magnetar Swift J1818.0-1607 using the Green Bank Telescope (GBT) at 2.0 GHz, which began in November 2021 during…
NuSTAR and XMM-Newton Observations of PSR J1930+1852 and Its Pulsar Wind Nebula
J. A. J. Alford, G. -B. Zhang, J. D. Gelfand
Synchrotron X-ray emission from a pulsar wind nebula (PWN) is a sensitive probe of its magnetic field and high-energy particle population. Here we analyze contemporaneous NuSTAR an…
ZTF IC 10 variable catalog
Zehao Jin, Joseph D. Gelfand
To study how massive variable stars effect their environment, we search for variability among Zwicky Transient Facility (ZTF) sources located within the optical extent of a nearby…
Stellar CoRGI in MaNGA: Stellar Counterrotating Galaxies Identified in the MaNGA Survey
Damir Gasymov, Ivan Yu. Katkov, Evgenii V. Rubtsov +8
Stellar counterrotating (CR) galaxies are systems hosting two large-scale stellar components rotating in opposite directions -- a main, preexisting galaxy body with an older stella…