K. Horne
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View article: The SDSS-V Black Hole Mapper Reverberation Mapping Project: Light Echoes of the Coronal-line Region in a Luminous Quasar
The SDSS-V Black Hole Mapper Reverberation Mapping Project: Light Echoes of the Coronal-line Region in a Luminous Quasar Open
We present a reverberation mapping (RM) analysis of the coronal line [Ne v ] λ 3427-emitting region of the quasar COS168 (SDSS J095910.30+020732.2). [Ne v ] λ 3427 is known as one of the “coronal lines,” which are a species of emission lin…
View article: The Accretion Disk Size Problem in AGN Disk Reverberation Mapping Is an Obscuration Effect: A Uniform AGN Sample Study with Swift
The Accretion Disk Size Problem in AGN Disk Reverberation Mapping Is an Obscuration Effect: A Uniform AGN Sample Study with Swift Open
In the past decade, Swift has performed several active galactic nucleus (AGN) high-cadence reverberation mapping campaigns, and it has generally found that the UV/optical interband lags are ∼3 times longer than predicted for a standard thi…
View article: TOI-7166 b: a habitable zone mini-Neptune planet around a nearby low-mass star
TOI-7166 b: a habitable zone mini-Neptune planet around a nearby low-mass star Open
We present the discovery and validation of TOI-7166 b, a $2.01 \pm 0.05\,\mathrm{ R}_{\oplus }$ planet orbiting a nearby low-mass star. We validated the planet by combining Transiting Exoplanet Survey Satellite and multicolour high-precisi…
View article: Structure of Kerr black hole spacetimes in Weyl conformal gravity
Structure of Kerr black hole spacetimes in Weyl conformal gravity Open
We analyze the stationary, uncharged, rotating, vacuum solution to Weyl conformal gravity. We elucidate the causal and ergoregion structure of the spacetimes found in the parameter space of the metric for positive mass. These are then comp…
View article: Charged black holes in Weyl conformal gravity
Charged black holes in Weyl conformal gravity Open
We present a parametric study of the spacetime structures obtainable in Weyl conformal gravity's dyonic Reissner-Nordström solution. We derive expressions for photon sphere radii and horizons for this metric in terms of the conformal gravi…
View article: High Five From ASTEP: Three Validated Planets and Two Eclipsing Binaries in a Diverse Set of Long-Period Candidates
High Five From ASTEP: Three Validated Planets and Two Eclipsing Binaries in a Diverse Set of Long-Period Candidates Open
We present the analysis of five long-period TESS Objects of Interest (TOIs), each with orbital periods exceeding one month. Initially identified by the Transiting Exoplanet Survey Satellite (TESS), we extensively monitored these targets wi…
View article: The SDSS-V Black Hole Mapper Reverberation Mapping Project: Multiline Dynamical Modeling of a Highly Variable Active Galactic Nucleus with Decade-long Light Curves
The SDSS-V Black Hole Mapper Reverberation Mapping Project: Multiline Dynamical Modeling of a Highly Variable Active Galactic Nucleus with Decade-long Light Curves Open
We present dynamical modeling of the broad-line region (BLR) of the highly variable active galactic nucleus (AGN) SDSS J141041.25+531849.0 ( z = 0.359) using photometric and spectroscopic monitoring data from the Sloan Digital Sky Survey (…
View article: Continuum reverberation mapping of accretion discs surrounding supermassive black hole binaries: observational signatures
Continuum reverberation mapping of accretion discs surrounding supermassive black hole binaries: observational signatures Open
It has remained challenging to reliably identify sub-parsec supermassive black hole binaries (SMBHBs), despite them being expected to be ubiquitous. We propose a new method using multiband continuum reverberation mapping to identify low-ma…
View article: The TESS Grand Unified Hot Jupiter Survey. III. Thirty More Giant Planets<sup>*</sup>
The TESS Grand Unified Hot Jupiter Survey. III. Thirty More Giant Planets<sup>*</sup> Open
We present the discovery of 30 transiting giant planets that were initially detected using data from NASA’s Transiting Exoplanet Survey Satellite mission. These new planets orbit relatively bright ( G ≤ 12.5) FGK host stars with orbital pe…
View article: A 16 Myr Super-Neptune in Upper Centaurus Lupus and a Preliminary Survey of Transiting Planets in Sco-Cen with TESS
A 16 Myr Super-Neptune in Upper Centaurus Lupus and a Preliminary Survey of Transiting Planets in Sco-Cen with TESS Open
Measuring the properties of planets younger than about 50 Myr helps to test different planetary formation and evolution models. NASA’s Transiting Exoplanet Survey Satellite (TESS) has observed nearly the entire sky, including a wide range …
View article: The Nineteenth Data Release of the Sloan Digital Sky Survey
The Nineteenth Data Release of the Sloan Digital Sky Survey Open
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 objects to constrain the physical processes that govern our…
View article: Eleven New Transiting Brown Dwarfs and Very-low-mass Stars from TESS
Eleven New Transiting Brown Dwarfs and Very-low-mass Stars from TESS Open
We present the discovery of 11 new transiting brown dwarfs (BDs) and low-mass M dwarfs from NASA’s Transiting Exoplanet Survey Satellite (TESS) mission: TOI-2844, TOI-3122, TOI-3577, TOI-3755, TOI-4462, TOI-4635, TOI-4737, TOI-4759, TOI-52…
View article: The Sloan Digital Sky Survey Reverberation Mapping Project: Insights on Maximizing Efficiency in Lag Measurements and Black Hole Masses
The Sloan Digital Sky Survey Reverberation Mapping Project: Insights on Maximizing Efficiency in Lag Measurements and Black Hole Masses Open
Multiyear observations from the Sloan Digital Sky Survey (SDSS) Reverberation Mapping (RM) project have significantly increased the number of quasars with reliable RM lag measurements. We statistically analyze target properties, light-cur…
View article: The TESS Grand Unified Hot Jupiter Survey. III. Thirty More Giant Planets
The TESS Grand Unified Hot Jupiter Survey. III. Thirty More Giant Planets Open
We present the discovery of 30 transiting giant planets that were initially detected using data from NASA's Transiting Exoplanet Survey Satellite (TESS) mission. These new planets orbit relatively bright ($G \leq 12.5$) FGK host stars with…
View article: Structure of Kerr black hole spacetimes in Weyl conformal gravity
Structure of Kerr black hole spacetimes in Weyl conformal gravity Open
We analyze the stationary, uncharged, rotating, vacuum solution to Weyl conformal gravity. We elucidate the causal and ergoregion structure of the spacetimes found in the parameter space of the metric for positive mass. These are then comp…
View article: Testing X-Ray Reprocessing and Mapping the Soft Excess of NGC 7469 with NICER
Testing X-Ray Reprocessing and Mapping the Soft Excess of NGC 7469 with NICER Open
We present an X-ray/UV reverberation analysis of NGC 7469 across 210 days, using daily NICER observations with contemporaneous monitoring by Swift UVOT+XRT. We model the X-ray spectrum with a power-law continuum and a soft excess during ea…
View article: Monitoring AGNs with H<i>β</i> Asymmetry. V. Long-term Variation and Evolution of the Broad H<i>β</i> Emission-line Profiles
Monitoring AGNs with H<i>β</i> Asymmetry. V. Long-term Variation and Evolution of the Broad H<i>β</i> Emission-line Profiles Open
The physical origins of the diverse emission-line asymmetries observed in the spectra of active galactic nuclei (AGNs) are not completely understood. Monitoring the temporal variations of line profiles offers a promising approach to invest…
View article: TOI-2005b: An Eccentric Warm Jupiter in Spin-orbit Alignment
TOI-2005b: An Eccentric Warm Jupiter in Spin-orbit Alignment Open
We report the discovery and characterization of TOI-2005 b, a warm Jupiter on an eccentric ( e ∼ 0.59), 17.3 days orbit around a V mag = 9.867 rapidly rotating F-star. The object was detected as a candidate by Transiting Exoplanet Survey S…
View article: A lasting legacy
A lasting legacy Open
Ingrid Pelisoli, Boris Gänsicke and colleagues celebrate the legacy of Tom Marsh, both in his wide-ranging research and as a driving force behind the 21 successful years of astronomy at the University of Warwick
View article: Constraining Atmospheric Composition from the Outflow: Helium Observations Reveal the Fundamental Properties of Two Planets Straddling the Radius Gap
Constraining Atmospheric Composition from the Outflow: Helium Observations Reveal the Fundamental Properties of Two Planets Straddling the Radius Gap Open
TOI-836 is a ∼2–3 Gyr K dwarf with an inner super Earth ( R = 1.7 R ⊕ , P = 3.8 days) and an outer mini-Neptune ( R = 2.6 R ⊕ , P = 8.6 days). JWST/NIRSpec 2.8–5.2 μ m transmission spectra are flat for both planets. We present Keck/NIRSPEC…
View article: Monitoring AGNs with H$β$ Asymmetry. V. Long-term Variation and Evolution of the Broad H$β$ Emission-Line Profiles
Monitoring AGNs with H$β$ Asymmetry. V. Long-term Variation and Evolution of the Broad H$β$ Emission-Line Profiles Open
The physical origins of the diverse emission-line asymmetries observed in the spectra of active galactic nuclei (AGNs) remain incompletely understood. Monitoring the temporal variations of line profiles offers a promising approach to inves…
View article: Estimating masses of supermassive black holes in active galactic nuclei from the H<i>α</i> emission line
Estimating masses of supermassive black holes in active galactic nuclei from the H<i>α</i> emission line Open
Aims. The goal of this project is to construct an estimator for the masses of supermassive black holes in active galactic nuclei (AGNs) based on the broad H α emission line. Methods. We made use of published reverberation mapping data. We …
View article: Understanding the Broad-line Region of Active Galactic Nuclei with Photoionization. I. The Moderate-accretion Regime
Understanding the Broad-line Region of Active Galactic Nuclei with Photoionization. I. The Moderate-accretion Regime Open
Over three decades of reverberation mapping (RM) studies on local broad-line active galactic nuclei (AGNs) have measured reliable black hole (BH) masses for >100 AGNs. These RM measurements reveal a significant correlation between the Balm…
View article: 11 New Transiting Brown Dwarfs and Very Low Mass Stars from TESS
11 New Transiting Brown Dwarfs and Very Low Mass Stars from TESS Open
We present the discovery of 11 new transiting brown dwarfs and low-mass M-dwarfs from NASA's TESS mission: TOI-2844, TOI-3122, TOI-3577, TOI-3755, TOI-4462, TOI-4635, TOI-4737, TOI-4759, TOI-5240, TOI-5467, and TOI-5882. They consist of 5 …
View article: Testing disc reprocessing models for AGN optical variability by comparison of X-ray and optical power spectra of NGC 4395
Testing disc reprocessing models for AGN optical variability by comparison of X-ray and optical power spectra of NGC 4395 Open
It is generally thought that active galactic nucleus (AGN) optical variability is produced, at least in part, by reprocessing of central X-rays by a surrounding accretion disc, resulting in wavelength-dependent lags between bands. Any good…
View article: Testing disc reprocessing models for AGN optical variability by comparison of X-ray and optical power spectra of NGC 4395
Testing disc reprocessing models for AGN optical variability by comparison of X-ray and optical power spectra of NGC 4395 Open
It is generally thought that AGN optical variability is produced, at least in part, by reprocessing of central X-rays by a surrounding accretion disc, resulting in wavelength-dependent lags between bands. Any good model of AGN optical vari…
View article: The Sloan Digital Sky Survey Reverberation Mapping Project: Insights on Maximizing Efficiency in Lag Measurements and Black-Hole Masses
The Sloan Digital Sky Survey Reverberation Mapping Project: Insights on Maximizing Efficiency in Lag Measurements and Black-Hole Masses Open
Multi-year observations from the Sloan Digital Sky Survey Reverberation Mapping (SDSS-RM) project have significantly increased the number of quasars with reliable reverberation-mapping lag measurements. We statistically analyze target prop…
View article: Connecting the X-Ray/UV Variability of Fairall 9 with NICER: A Possible Warm Corona
Connecting the X-Ray/UV Variability of Fairall 9 with NICER: A Possible Warm Corona Open
The Seyfert 1 active galactic nucleus Fairall 9 was targeted by NICER, Swift, and ground-based observatories for a ∼1000 day long reverberation mapping campaign. The following analysis of NICER spectra taken at a 2 day cadence provides new…
View article: TOI-4336 A b: A temperate sub-Neptune ripe for atmospheric characterization in a nearby triple M-dwarf system
TOI-4336 A b: A temperate sub-Neptune ripe for atmospheric characterization in a nearby triple M-dwarf system Open
Context. Small planets transiting bright nearby stars are essential to our understanding of the formation and evolution of exoplanetary systems. However, few constitute prime targets for atmospheric characterization, and even fewer are par…
View article: Migration and Evolution of giant ExoPlanets (MEEP). I. Nine Newly Confirmed Hot Jupiters from the TESS Mission
Migration and Evolution of giant ExoPlanets (MEEP). I. Nine Newly Confirmed Hot Jupiters from the TESS Mission Open
Hot Jupiters were many of the first exoplanets discovered in the 1990s, but in the decades since their discovery the mysteries surrounding their origins have remained. Here we present nine new hot Jupiters (TOI-1855 b, TOI-2107 b, TOI-2368…