activity
20222026
most citedOptical Variability of Quasars with 20-Year Photometric Light Curves

75 citations · 98 across the 16 of their papers we have counts for

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14 papers · 1 filter

astro-ph.GA2026

NEXUS: Spectral Variability of Little Red Dots and Blue Active Galactic Nuclei at

Zachary Stone, Yue Shen, Ming-Yang Zhuang +4

We present spectral measurements for 17 Little Red Dots (LRDs) and 14 blue broad-line active galactic nuclei (AGNs) at using multi-epoch JWST NIRSpec MSA s…

astro-ph.GA2026

The Twentieth Data Release of the Sloan Digital Sky Survey: First All-Sky BOSS Spectra, eROSITA-SDSS-V Mapper Coordinated Observations, and a Preview of the Local Volume Mapper

SDSS Collaboration, Mojgan Aghakhanloo, David Aguilar +273

This paper presents the twentieth data release (DR20) from the Sloan Digital Sky Survey, the third data release of its fifth generation (SDSS-V). SDSS-V is a panoptic spectroscopy…

astro-ph.GA2026

NEXUS: Abundance, Environments, and Spectral Diversity of Little Red Dots from the NIRSpec MSA Sample

Zhiwei Pan, Ming-Yang Zhuang, Yue Shen +6

We present a comprehensive study of Little Red Dots (LRDs) at 2.3 < z < 7.4 using NIRCam photometry and NIRSpec MSA/PRISM spectra from the ongoing NEXUS program. Photometric select…

astro-ph.GA2026★ 1 cited

Identifying Changing-Look AGN Transitions in Light Curve Data with the Zwicky Transient Facility

Margaret E. Verrico, K. Decker French, Vivienne F. Baldassare +10

Changing-Look AGN (CL-AGN) are AGN which transition between Seyfert types, challenging AGN unification models. Most CL-AGN have been identified via repeat spectroscopy, making it d…

astro-ph.GA2026

JWST's PEARLS: A clumpy ring galaxy at

David Vizgan, Ming-Yang Zhuang, Ian Smail +22

Ring galaxies are an uncommon class of galaxies whose morphology is closely related to dynamical processes that govern galaxy evolution. Some ring galaxies, known as "collisional r…

astro-ph.GA2025

Too Quiet for Comfort: Local Little Red Dots Lack Variability over Decades

Colin J. Burke, Zachary Stone, Yue Shen +1

Several local () metal-poor dwarf AGNs have remarkably similar properties to those of high-redshift Little Red Dots (LRDs), and are recently proposed to be local ana…

astro-ph.GA2025★ 1 cited

NEXUS: A Search for Nuclear Variability with the First Two JWST NIRCam Epochs

Zachary Stone, Yue Shen, Ming-Yang Zhuang +10

The multi-cycle JWST Treasury program NEXUS will obtain cadenced imaging and spectroscopic observations around the North Ecliptic Pole during 2024-2028. Here we report a systematic…

astro-ph.GA2025★ 8 cited

The Nineteenth Data Release of the Sloan Digital Sky Survey

SDSS Collaboration, Gautham Adamane Pallathadka, Mojgan Aghakhanloo +210

Mapping the local and distant Universe is key to our understanding of it. For decades, the Sloan Digital Sky Survey (SDSS) has made a concerted effort to map millions of celestial…

astro-ph.GA2024

The SDSS-V Black Hole Mapper Reverberation Mapping Project: A Kinematically Variable Broad-Line Region and Consequences for Masses of Luminous Quasars

Logan B. Fries, Jonathan R. Trump, Keith Horne +27

We present a velocity-resolved reverberation mapping analysis of the hypervariable quasar RM160 (SDSS J141041.25+531849.0) at z = 0.359 with 153 spectroscopic epochs of data repres…

astro-ph.GA2024

The SDSS-V Black Hole Mapper Reverberation Mapping Project: Multi-Line Dynamical Modeling of a Highly Variable Active Galactic Nucleus with Decade-long Light Curves

Zachary Stone, Yue Shen, Scott F. Anderson +15

We present dynamical modeling of the broad-line region (BLR) for the highly variable AGN SDSS J141041.25+531849.0 () using photometric and spectroscopic monitoring data…

astro-ph.GA2024★ 1 cited

High-quality Extragalactic Legacy-field Monitoring (HELM) with DECam

Ming-Yang Zhuang, Qian Yang, Yue Shen +45

High-quality Extragalactic Legacy-field Monitoring (HELM) is a long-term observing program that photometrically monitors several well-studied extragalactic legacy fields with the D…

astro-ph.GA2023★ 5 cited

The Sloan Digital Sky Survey Reverberation Mapping Project: Key Results

Yue Shen, Catherine J. Grier, Keith Horne +44

We present the final data from the Sloan Digital Sky Survey Reverberation Mapping (SDSS-RM) project, a precursor to the SDSS-V Black Hole Mapper Reverberation Mapping program. This…

astro-ph.GA2022★ 7 cited

Temperature Fluctuations in Quasar Accretion Discs from Spectroscopic Monitoring Data

Zachary Stone, Yue Shen

Neustadt & Kochanek (2022, hereafter NK22) proposed a new method to reconstruct the temperature perturbation map (as functions of time and disc radius) of AGN accretion discs using…

astro-ph.GA2022★ 75 cited

Optical Variability of Quasars with 20-Year Photometric Light Curves

Zachary Stone, Yue Shen, Colin J. Burke +52

We study the optical photometric variability of a sample of 190 quasars within the SDSS Stripe 82 region that have long-term photometric coverage during with…