Jenny E. Greene
YOU?
Author Swipe
View article: Cross-correlation of Luminous Red Galaxies with ML-selected Active Galactic Nuclei in HSC-SSP. II. AGN Classification and Clustering with DESI Spectroscopy
Cross-correlation of Luminous Red Galaxies with ML-selected Active Galactic Nuclei in HSC-SSP. II. AGN Classification and Clustering with DESI Spectroscopy Open
An unresolved question in studies of active galactic nuclei (AGNs) is whether their distinct classes probe different evolutionary stages of black hole–host galaxy interaction. We present the projected two-point cross-correlation function b…
View article: Little Red Dots at an Inflection Point: Ubiquitous V-shaped Turnover Consistently Occurs at the Balmer Limit
Little Red Dots at an Inflection Point: Ubiquitous V-shaped Turnover Consistently Occurs at the Balmer Limit Open
Among the most puzzling early discoveries of JWST are “little red dots” (LRDs), compact red sources that host broad Balmer emission lines, and in many cases exhibit a “V-shaped” change in slope in the rest-optical. The physical properties …
View article: The Balmer Break and Optical Continuum of Little Red Dots from Super-Eddington Accretion
The Balmer Break and Optical Continuum of Little Red Dots from Super-Eddington Accretion Open
The physical origin of little red dots (LRDs)—compact extragalactic sources with red rest-optical continua and broad Balmer lines—remains elusive. The redness of LRDs is likely intrinsic, suggesting optically thick gas emitting at a charac…
View article: Unusually High Gas-to-dust Ratios Observed in High-redshift Quiescent Galaxies
Unusually High Gas-to-dust Ratios Observed in High-redshift Quiescent Galaxies Open
Tracking the cold molecular gas contents of galaxies is critical to understand the interplay between star formation and galaxy growth across cosmic time. Observations of the long-wavelength dust continuum, a proxy for the cold gas, are wid…
View article: Cold Gas in a Post-starburst Pair in the <i>z</i> ∼ 1.4 HeavyMetal Survey: Major Mergers as a Pathway to Retain Gas in Quenched Galaxies
Cold Gas in a Post-starburst Pair in the <i>z</i> ∼ 1.4 HeavyMetal Survey: Major Mergers as a Pathway to Retain Gas in Quenched Galaxies Open
Recent observations at low redshift have revealed that some post-starburst galaxies retain significant molecular gas reservoirs despite low ongoing star formation rates, challenging most theoretical predictions that rely on heating or expe…
View article: The Structure and Formation Histories of Low-mass Quiescent Galaxies in the A2744 Cluster Environment
The Structure and Formation Histories of Low-mass Quiescent Galaxies in the A2744 Cluster Environment Open
Low-mass quiescent galaxies are thought to predominantly reside in overdense regions, as environmental effects are often invoked to explain their shutdown of star formation. These longer-timescale quenching mechanisms—such as interactions …
View article: First Data Release of the Merian Survey: A Wide-field Imaging Survey of Dwarf Galaxies at <i>z</i> ∼ 0.06–0.10
First Data Release of the Merian Survey: A Wide-field Imaging Survey of Dwarf Galaxies at <i>z</i> ∼ 0.06–0.10 Open
We present an overview of the Merian Survey and its forthcoming first data release (DR1), an optical imaging survey optimized for studying bright-star-forming dwarf galaxies. Merian uses two medium-band filters (N708 and N540, centered at …
View article: Central Massive Black Holes Are Not Ubiquitous in Local Low-mass Galaxies
Central Massive Black Holes Are Not Ubiquitous in Local Low-mass Galaxies Open
The black hole occupation fraction ( f occ ) defines the fraction of galaxies that harbor central massive black holes (MBHs), irrespective of their accretion activity level. While it is widely accepted that f occ is nearly 100% in local ma…
View article: Cross-correlation of Luminous Red Galaxies with ML-selected AGN in HSC-SSP III: HOD Parameters for Type I and Type II Quasars
Cross-correlation of Luminous Red Galaxies with ML-selected AGN in HSC-SSP III: HOD Parameters for Type I and Type II Quasars Open
Understanding the dark matter (DM) halo environment in which galaxies that host active galactic nuclei (AGN) reside is a window into the nature of supermassive black hole (SMBH) accretion. We apply halo occupation distribution (HOD) modeli…
View article: Evidence for Supermassive Black Hole Binaries
Evidence for Supermassive Black Hole Binaries Open
We review the state of the evidence for the existence and observational appearance of supermassive black hole binaries. Such objects are expected from standard hierarchical galaxy evolution to form after two galaxies, each containing a sup…
View article: Central Massive Black Holes Are Not Ubiquitous in Local Low-Mass Galaxies
Central Massive Black Holes Are Not Ubiquitous in Local Low-Mass Galaxies Open
The black-hole occupation fraction ($f_\mathrm{occ}$) defines the fraction of galaxies that harbor central massive black holes (MBHs), irrespective of their accretion activity level. While it is widely accepted that $f_\mathrm{occ}$ is nea…
View article: Measurement of Dark Matter Substructure from the Kinematics of the GD-1 Stellar Stream
Measurement of Dark Matter Substructure from the Kinematics of the GD-1 Stellar Stream Open
Stellar streams are sensitive tracers of low-mass dark matter subhalos and provide a means to test the Cold Dark Matter (CDM) paradigm on small scales. In this work, we connect the intrinsic velocity dispersion of the GD-1 stream to the nu…
View article: Mapping the Stellar Kinematics in the Central 240 Parsecs of M87 with the James Webb Space Telescope
Mapping the Stellar Kinematics in the Central 240 Parsecs of M87 with the James Webb Space Telescope Open
The supermassive black hole (SMBH) in the giant elliptical galaxy M87 is one of the most well-studied in the local universe, but the stellar- and gas-dynamical SMBH mass measurements disagree. As this galaxy is a key anchor for the upper e…
View article: WIggle Corrector Kit for NIRSpEc Data: WICKED
WIggle Corrector Kit for NIRSpEc Data: WICKED Open
Context . The point spread function of the integral field unit (IFU) mode of the Near-Infrared Spectrograph (NIRSpec) detector of JWST is undersampled. The resampling of the spectra into a 3D data cube creates resampling noise seen as low-…
View article: A Confirmed Deficit of Hot and Cold Dust Emission in the Most Luminous Little Red Dots
A Confirmed Deficit of Hot and Cold Dust Emission in the Most Luminous Little Red Dots Open
Luminous broad H α emission and red rest-optical spectral energy distributions (SEDs) are the hallmark of compact little red dots (LRDs), implying highly attenuated dusty starbursts and/or obscured active galactic nuclei (AGN). However, th…
View article: Joint X-ray, kinetic Sunyaev-Zeldovich, and weak lensing measurements: toward a consensus picture of efficient gas expulsion from groups and clusters
Joint X-ray, kinetic Sunyaev-Zeldovich, and weak lensing measurements: toward a consensus picture of efficient gas expulsion from groups and clusters Open
There is no consensus on how baryon feedback shapes the underlying matter distribution from either simulations or observations. We confront the uncertain landscape by jointly analyzing new measurements of the gas distribution around groups…
View article: What you see is what you get: empirically measured bolometric luminosities of Little Red Dots
What you see is what you get: empirically measured bolometric luminosities of Little Red Dots Open
New populations of red active galactic nuclei (known as ``Little Red Dots'') discovered by JWST exhibit remarkable spectral energy distributions. Leveraging X-ray through far-infrared observations of two of the most luminous known Little R…
View article: Quenching through Tidal Gas Removal: Molecular Gas and Star Formation in Tidal Tails of <i>z</i> ∼ 0.7 Post-starburst Galaxies
Quenching through Tidal Gas Removal: Molecular Gas and Star Formation in Tidal Tails of <i>z</i> ∼ 0.7 Post-starburst Galaxies Open
The active suppression of star formation in galaxies is critical for preventing the growth of overly massive systems and explaining the formation of present-day elliptical galaxies. We present a high-resolution, spatially resolved, multiwa…
View article: A remarkable ruby: Absorption in dense gas, rather than evolved stars, drives the extreme Balmer break of a little red dot at <i>z</i> = 3.5
A remarkable ruby: Absorption in dense gas, rather than evolved stars, drives the extreme Balmer break of a little red dot at <i>z</i> = 3.5 Open
The origin of the rest-optical emission of compact, red, high-redshift sources known as little red dots (LRDs) poses a major puzzle. If interpreted as starlight, it would imply that LRDs constitute the densest stellar systems in the Univer…
View article: UNCOVER/MegaScience: No Evidence of Environmental Quenching in a <i>z </i>∼ 2.6 Protocluster
UNCOVER/MegaScience: No Evidence of Environmental Quenching in a <i>z </i>∼ 2.6 Protocluster Open
Environmental quenching—where interactions with other galaxies and/or the intracluster medium suppress star formation in low-mass galaxies—has been well established as the primary driver behind the formation of the red sequence for low-mas…
View article: RUBIES: A spectroscopic census of little red dots
RUBIES: A spectroscopic census of little red dots Open
The physical nature of little red dots (LRDs), a population of compact red galaxies revealed by JWST, remains unclear. Photometric samples were constructed from varying selection criteria with limited spectroscopic follow-up available to t…
View article: RUBIES spectroscopically confirms the high number density of quiescent galaxies from $\mathbf{2
RUBIES spectroscopically confirms the high number density of quiescent galaxies from $\mathbf{2 Open
We present the number density of massive ($ \mathrm{ log (M_{*}/M_{\odot}) > 10.3} $) quiescent galaxies at $23$, most simulations fail to produce enough massive quiescent galaxies, suggesting the treatment of feedback and/or the channels …
View article: Magellan Spectroscopy of Active Galactic Nuclei in Low-mass Galaxies: Scaling Relations and a Triple-peaked Active Galactic Nucleus
Magellan Spectroscopy of Active Galactic Nuclei in Low-mass Galaxies: Scaling Relations and a Triple-peaked Active Galactic Nucleus Open
In this work, we aim to further populate the low-mass regime of black hole (BH) scaling relations to better understand the formation and growth mechanisms of central supermassive BHs. We target six galaxies that have been previously identi…
View article: The MASSIVE Survey. XX. A Triaxial Stellar Dynamical Measurement of the Supermassive Black Hole Mass and Intrinsic Galaxy Shape of Giant Radio Galaxy NGC 315
The MASSIVE Survey. XX. A Triaxial Stellar Dynamical Measurement of the Supermassive Black Hole Mass and Intrinsic Galaxy Shape of Giant Radio Galaxy NGC 315 Open
We present a new dynamical measurement of the supermassive black hole mass and intrinsic shape of the stellar halo of the massive radio galaxy NGC 315 as part of the MASSIVE survey. High signal-to-noise ratio spectra from integral-field sp…
View article: Environmental Evidence for Overly Massive Black Holes in Low-mass Galaxies and a Black Hole–Halo Mass Relation at <i>z</i> ∼ 5
Environmental Evidence for Overly Massive Black Holes in Low-mass Galaxies and a Black Hole–Halo Mass Relation at <i>z</i> ∼ 5 Open
JWST observations have unveiled faint active galactic nuclei (AGNs) at high redshift that provide insights into the formation of supermassive black holes (SMBHs). However, disentangling their stellar from AGN light is challenging. Here, we…
View article: JWST UNCOVERs the Optical Size–Stellar Mass Relation at 4 < <i>z</i> < 8: Rapid Growth in the Sizes of Low-mass Galaxies in the First Billion Years of the Universe
JWST UNCOVERs the Optical Size–Stellar Mass Relation at 4 < <i>z</i> < 8: Rapid Growth in the Sizes of Low-mass Galaxies in the First Billion Years of the Universe Open
We study the rest-frame optical and ultraviolet (UV) morphology of galaxies in the first billion years of the Universe. Using James Webb Space Telescope data from the UNCOVER and MegaScience surveys targeting the lensing cluster A2744, we …
View article: Magellan Spectroscopy of AGNs in Low-mass Galaxies: Scaling Relations and a Triple-Peaked AGN
Magellan Spectroscopy of AGNs in Low-mass Galaxies: Scaling Relations and a Triple-Peaked AGN Open
In this work, we aim to further populate the low-mass regime of black hole (BH) scaling relations to better understand the formation and growth mechanisms of central supermassive BHs. We target six galaxies that have been previously identi…
View article: Unusually High Gas-to-Dust Ratios Observed in High-Redshift Quiescent Galaxies
Unusually High Gas-to-Dust Ratios Observed in High-Redshift Quiescent Galaxies Open
Tracking the cold molecular gas contents of galaxies is critical to understand the interplay between star formation and galaxy growth across cosmic time. Observations of the long-wavelength dust continuum, a proxy for the cold gas, are wid…
View article: Measuring Emission Lines with JWST MegaScience Medium Bands: A New Window into Dust and Star Formation at Cosmic Noon
Measuring Emission Lines with JWST MegaScience Medium Bands: A New Window into Dust and Star Formation at Cosmic Noon Open
We demonstrate the power of JWST-NIRCam medium-band photometry to measure emission line fluxes and study the dust and star formation properties of galaxies at cosmic noon. In this work, we present photometric emission line measurements and…
View article: The Discovery of Little Red Dots in the Local Universe: Signatures of Cool Gas Envelopes
The Discovery of Little Red Dots in the Local Universe: Signatures of Cool Gas Envelopes Open
JWST observations have revealed a population of high-redshift "little red dots" (LRDs) that challenge conventional AGN models. We report the discovery of three local LRDs at $z = 0.1$-$0.2$, initially selected from the SDSS database, with …