Grids of stellar models with rotation VII: models from 0.8 to 300 M-circle dot at supersolar metallicity (Z=0.020) (2022)
Journal Article
Yusof, N., Hirschi, R., Eggenberger, P., Ekström, S., Georgy, C., Sibony, Y., …Murphy, L. (2022). Grids of stellar models with rotation VII: models from 0.8 to 300 M-circle dot at supersolar metallicity (Z=0.020). Monthly Notices of the Royal Astronomical Society, 511(2), 2814 - 2828. https://doi.org/10.1093/mnras/stac230

We present a grid of stellar models at supersolar metallicity (Z = 0.020) extending the previous grids of Geneva models at solar and sub-solar metallicities. A metallicity of Z = 0.020 was chosen to match that of the inner Galactic disc. A modest inc... Read More about Grids of stellar models with rotation VII: models from 0.8 to 300 M-circle dot at supersolar metallicity (Z=0.020).

An Isolated Stellar-Mass Black Hole Detected Through Astrometric Microlensing (2022)
Journal Article
Sahu, K. C., Anderson, J., Casertano, S., Bond, H. E., Udalski, A., Dominik, M., …Collaboration, R. (2022). An Isolated Stellar-Mass Black Hole Detected Through Astrometric Microlensing. Astrophysical Journal, 933(1),

We report the first unambiguous detection and mass measurement of an isolated stellar-mass black hole (BH). We used the Hubble Space Telescope (HST) to carry out precise astrometry of the source star of the long-duration (t_E ~ 270 days), high-magnif... Read More about An Isolated Stellar-Mass Black Hole Detected Through Astrometric Microlensing.

BEBOP II: sensitivity to sub-Saturn circumbinary planets using radial-velocities (2022)
Journal Article
Maxted, & Hellier. (2022). BEBOP II: sensitivity to sub-Saturn circumbinary planets using radial-velocities. Monthly Notices of the Royal Astronomical Society, 3571 - 3583. https://doi.org/10.1093/mnras/stac113

BEBOP is a radial-velocity survey that monitors a sample of single-lined eclipsing binaries, in search of circumbinary planets by using high-resolution spectrographs. Here, we describe and test the methods we use to identify planetary signals within... Read More about BEBOP II: sensitivity to sub-Saturn circumbinary planets using radial-velocities.

V4334 Sgr (Sakurai's Object): still churning out the dust (2022)
Journal Article
(2022). V4334 Sgr (Sakurai's Object): still churning out the dust. Monthly Notices of the Royal Astronomical Society, 713-722. https://doi.org/10.1093/mnras/stac095

We present a 0.8–2.5 µm spectrum of the Very Late Thermal Pulse object V4334 Sgr (Sakurai’s Object), obtained in 2020 September. The spectrum displays a continuum that rises strongly to longer wavelengths, and is considerably brighter than the most r... Read More about V4334 Sgr (Sakurai's Object): still churning out the dust.

Parameters of the eclipsing binary a Draconis observed by TESS and SONG (2022)
Journal Article
Hey, D. R., Kochoska, A., Monier, R., Kochukhov, O., Johnston, C., Bedding, T. R., …Pallé, P. L. (2022). Parameters of the eclipsing binary a Draconis observed by TESS and SONG. Monthly Notices of the Royal Astronomical Society, 511(2), 2648-2658. https://doi.org/10.1093/mnras/stac020

We present an analysis of the eclipsing single-lined spectroscopic binary system a Dra based on photometry from the Transiting Exoplanet Survey Satellite (TESS) mission and newly acquired spectroscopic measurements. Recently discovered to have eclips... Read More about Parameters of the eclipsing binary a Draconis observed by TESS and SONG.

A pair of sub-Neptunes transiting the bright K-dwarf TOI-1064 characterized with CHEOPS (2022)
Journal Article
Maxted. (2022). A pair of sub-Neptunes transiting the bright K-dwarf TOI-1064 characterized with CHEOPS. Monthly Notices of the Royal Astronomical Society, 1043 - 1071. https://doi.org/10.1093/mnras/stab3799

We report the discovery and characterization of a pair of sub-Neptunes transiting the bright K-dwarf TOI-1064 (TIC 79748331), initially detected in the Transiting Exoplanet Survey Satellite (TESS) photometry. To characterize the system, we performed... Read More about A pair of sub-Neptunes transiting the bright K-dwarf TOI-1064 characterized with CHEOPS.

Detection of the tidal deformation of WASP-103b at 3 s with CHEOPS (2022)
Journal Article
Maxted. (2022). Detection of the tidal deformation of WASP-103b at 3 s with CHEOPS. Astronomy & Astrophysics, https://doi.org/10.1051/0004-6361/202142196

Context. Ultra-short period planets undergo strong tidal interactions with their host star which lead to planet deformation and orbital tidal decay.

Aims. WASP-103b is the exoplanet with the highest expected deformation signature in its transit li... Read More about Detection of the tidal deformation of WASP-103b at 3 s with CHEOPS.

The Isaac Newton Telescope Monitoring Survey of Local Group Dwarf Galaxies. II. The Star-formation History of Andromeda I Derived from Long-period Variables (2021)
Journal Article
Van Loon. (2021). The Isaac Newton Telescope Monitoring Survey of Local Group Dwarf Galaxies. II. The Star-formation History of Andromeda I Derived from Long-period Variables. Astrophysical Journal, https://doi.org/10.3847/1538-4357/ac2d96

An optical monitoring survey in the nearby dwarf galaxies was carried out with the 2.5 m Isaac Newton Telescope. 55 dwarf galaxies and four isolated globular clusters in the Local Group were observed with the Wide Field Camera. The main aims of this... Read More about The Isaac Newton Telescope Monitoring Survey of Local Group Dwarf Galaxies. II. The Star-formation History of Andromeda I Derived from Long-period Variables.

Families and clusters of diffuse interstellar bands: a data-driven correlation analysis (2021)
Journal Article
Van Loon. (2021). Families and clusters of diffuse interstellar bands: a data-driven correlation analysis. Monthly Notices of the Royal Astronomical Society, 3546 - 3560. https://doi.org/10.1093/mnras/stab3651

More than 500 diffuse interstellar bands (DIBs) have been observed in astronomical spectra, and their signatures and correlations in different environments have been studied over the past decades to reveal clues about the nature of the carriers. We c... Read More about Families and clusters of diffuse interstellar bands: a data-driven correlation analysis.

TOI-1201 b: A mini-Neptune transiting a bright and moderately young M dwarf (2021)
Journal Article
Hellier. (2021). TOI-1201 b: A mini-Neptune transiting a bright and moderately young M dwarf. Astronomy & Astrophysics, https://doi.org/10.1051/0004-6361/202141587

We present the discovery of a transiting mini-Neptune around TOI-1201, a relatively bright and moderately young early M dwarf (J ˜ 9.5 mag, ~600–800 Myr) in an equal-mass ~8 arcsecond-wide binary system, using data from the Transiting Exoplanet Surve... Read More about TOI-1201 b: A mini-Neptune transiting a bright and moderately young M dwarf.

GJ 367b: A dense, ultrashort-period sub-Earth planet transiting a nearby red dwarf star. (2021)
Journal Article
Hellier. (2021). GJ 367b: A dense, ultrashort-period sub-Earth planet transiting a nearby red dwarf star. Science, 1271 - 1275. https://doi.org/10.1126/science.aay3253

Ultrashort-period (USP) exoplanets have orbital periods shorter than 1 day. Precise masses and radii of USP exoplanets could provide constraints on their unknown formation and evolution processes. We report the detection and characterization of the U... Read More about GJ 367b: A dense, ultrashort-period sub-Earth planet transiting a nearby red dwarf star..

TIC 172900988: A Transiting Circumbinary Planet Detected in One Sector of TESS Data (2021)
Journal Article
Hellier, & Maxted. (2021). TIC 172900988: A Transiting Circumbinary Planet Detected in One Sector of TESS Data. Astronomical Journal, https://doi.org/10.3847/1538-3881/ac223a

We report the first discovery of a transiting circumbinary planet detected from a single sector of Transiting Exoplanet Survey Satellite (TESS) data. During Sector 21, the planet TIC 172900988b transited the primary star and then five days later it t... Read More about TIC 172900988: A Transiting Circumbinary Planet Detected in One Sector of TESS Data.

REDISCUSSION OF ECLIPSING BINARIES. PAPER 7: DELTA SCUTI, GAMMA DORADUS, AND TIDALLY-PERTURBED PULSATIONS IN RR LYNCIS (2021)
Journal Article
Taylor. (2021). REDISCUSSION OF ECLIPSING BINARIES. PAPER 7: DELTA SCUTI, GAMMA DORADUS, AND TIDALLY-PERTURBED PULSATIONS IN RR LYNCIS. Observatory, 141, 282

RR Lyn is a detached eclipsing binary with a 9.95 d orbit containing two A-stars: one metallic-lined and one possibly metal-poor. We use the light curve from the TESS satellite and two sets of published radial velocity measurements to determine the p... Read More about REDISCUSSION OF ECLIPSING BINARIES. PAPER 7: DELTA SCUTI, GAMMA DORADUS, AND TIDALLY-PERTURBED PULSATIONS IN RR LYNCIS.

Proper motions of OB stars in the far Carina Arm (2021)
Journal Article
Wright. (2021). Proper motions of OB stars in the far Carina Arm. Monthly Notices of the Royal Astronomical Society, 4952 - 4968. https://doi.org/10.1093/mnras/stab2905

<jats:title>ABSTRACT</jats:title> <jats:p>In large-scale maps of the Galactic disc, the Carina Arm stands out as a clear spiral feature, hosting prominent star clusters and associations rich in massive stars. We study the proper motions of 4199 O and... Read More about Proper motions of OB stars in the far Carina Arm.

Analysis of Early Science observations with the CHaracterising ExOPlanets Satellite (CHEOPS) using pycheops (2021)
Journal Article
Maxted, P. F. L., Ehrenreich, D., Wilson, T. G., Alibert, Y., Cameron, A. C., Hoyer, S., …Walton, N. A. (2022). Analysis of Early Science observations with the CHaracterising ExOPlanets Satellite (CHEOPS) using pycheops. Monthly Notices of the Royal Astronomical Society, 514(1), 77-104. https://doi.org/10.1093/mnras/stab3371

CHEOPS (CHaracterising ExOPlanet Satellite) is an ESA S-class mission that observes bright stars at high cadence from low-Earth orbit. The main aim of the mission is to characterize exoplanets that transit nearby stars using ultrahigh precision photo... Read More about Analysis of Early Science observations with the CHaracterising ExOPlanets Satellite (CHEOPS) using pycheops.

High-resolution H alpha imaging of the northern Galactic plane and the IGAPS image database (2021)
Journal Article
Wright. (2021). High-resolution H alpha imaging of the northern Galactic plane and the IGAPS image database. Astronomy & Astrophysics, https://doi.org/10.1051/0004-6361/202140950

The INT Galactic Plane Survey (IGAPS) is the merger of the optical photometric surveys IPHAS and UVEX based on data from the Isaac Newton Telescope (INT) obtained between 2003 and 2018. It captures the entire northern Galactic plane within the Galact... Read More about High-resolution H alpha imaging of the northern Galactic plane and the IGAPS image database.

Presence of red giant population in the foreground stellar substructure of the Small Magellanic Cloud (2021)
Journal Article
Van Loon. (2021). Presence of red giant population in the foreground stellar substructure of the Small Magellanic Cloud. Monthly Notices of the Royal Astronomical Society, 5854 - 5863. https://doi.org/10.1093/mnras/stab2873

<jats:title>ABSTRACT</jats:title> <jats:p>The eastern region of the Small Magellanic Cloud (SMC) is found to have a foreground stellar substructure, which is identified as a distance bimodality (~12?kpc apart) in the previous studies using red clump... Read More about Presence of red giant population in the foreground stellar substructure of the Small Magellanic Cloud.

Convective boundary structure and mixing in stellar interiors (2021)
Thesis
Scott, L. J. A. (2021). Convective boundary structure and mixing in stellar interiors. (Thesis). Keele University

The treatment of convection remains one of the key uncertainties in stellar evolution. In particular, mixing processes at the boundaries of convective regions are complex and diffcult to define analytically. Therefore, hydrodynamic simulations are us... Read More about Convective boundary structure and mixing in stellar interiors.

The Gaia-ESO Survey: Membership probabilities for stars in 63 open and 7 globular clusters from 3D kinematics (2021)
Journal Article
Wright, & Jeffries. (2021). The Gaia-ESO Survey: Membership probabilities for stars in 63 open and 7 globular clusters from 3D kinematics. Monthly Notices of the Royal Astronomical Society, https://doi.org/10.1093/mnras/stab3032

Spectroscopy from the final internal data release of the Gaia-ESO Survey (GES) has been combined with Gaia EDR3 to assign membership probabilities to targets observed towards 63 Galactic open clusters and 7 globular clusters. The membership probabili... Read More about The Gaia-ESO Survey: Membership probabilities for stars in 63 open and 7 globular clusters from 3D kinematics.

The changing face of AU Mic b: stellar spots, spin-orbit commensurability, and transit timing variations as seen by CHEOPS and TESS (2021)
Journal Article
Maxted. (2021). The changing face of AU Mic b: stellar spots, spin-orbit commensurability, and transit timing variations as seen by CHEOPS and TESS. Astronomy & Astrophysics, 654, Article A159

AU Mic is a young planetary system with a resolved debris disc showing signs of planet formation and two transiting warm Neptunes near mean-motion resonances. Here we analyse three transits of AU Mic b observed with the CHaracterising ExOPlanet Satel... Read More about The changing face of AU Mic b: stellar spots, spin-orbit commensurability, and transit timing variations as seen by CHEOPS and TESS.