Pre-solar grains from novae and "Born-again giants" (2024)
Book Chapter
Evans, A., & Gehrz, R. (2024). Pre-solar grains from novae and "Born-again giants". In Presolar grains in extra-terrestrial materials. Elsevier

We review the properties of dust formed during classical nova eruptions and the Very Late Thermal Pulses (VLTPs) that occur during the later stages of post-Asymptotic Giant Branch evolution of low-mass stars. In both cases, carbon and hydrocarbon dus... Read More about Pre-solar grains from novae and "Born-again giants".

BEBOP V. Homogeneous stellar analysis of potential circumbinary planet hosts (2024)
Journal Article
Freckelton, A. V., Sebastian, D., Mortier, A., Triaud, A. H. M. J., Maxted, P. F. L., Acuña, L., …Willett, E. (2024). BEBOP V. Homogeneous stellar analysis of potential circumbinary planet hosts. Monthly Notices of the Royal Astronomical Society, 531(4), 4085-4098. https://doi.org/10.1093/mnras/stae1405

Planets orbiting binary systems are relatively unexplored compared to those around single stars. Detections of circumbinary planets and planetary systems offer a first detailed view into our understanding of circumbinary planet formation and dynamica... Read More about BEBOP V. Homogeneous stellar analysis of potential circumbinary planet hosts.

Physical properties of eclipsing binaries containing intermediate-mass pulsators or low-mass stars (2024)
Thesis
Jennings, Z. P. S. (2024). Physical properties of eclipsing binaries containing intermediate-mass pulsators or low-mass stars. (Thesis). Keele University. Retrieved from https://keele-repository.worktribe.com/output/775631

Precise stellar parameter measurements are crucial for improving our theoretical understanding of stellar structure. They help quantify model errors and uncertainties and provide vital constraints for interpreting observed phenomena, such as radius i... Read More about Physical properties of eclipsing binaries containing intermediate-mass pulsators or low-mass stars.

Exoplanet radius measurements for short-period exoplanets observed by the CHEOPS mission (2024)
Thesis
Harris, B. M. (2024). Exoplanet radius measurements for short-period exoplanets observed by the CHEOPS mission. (Thesis). Keele University. Retrieved from https://keele-repository.worktribe.com/output/775271

Context. Scheduling observing time for the CHEOPS mission leaves short gaps in which the telescope goes unused. If data collected during these gaps provided quality results, they could be utilised to make observing time more efficient.
Aims. The ai... Read More about Exoplanet radius measurements for short-period exoplanets observed by the CHEOPS mission.

Hydrodynamic simulations of convection and nucleosynthesis in the late phases of massive stars to constrain and guide stellar evolution theory (2023)
Thesis
Rizzuti, F. (2023). Hydrodynamic simulations of convection and nucleosynthesis in the late phases of massive stars to constrain and guide stellar evolution theory. (Thesis). Keele University. Retrieved from https://keele-repository.worktribe.com/output/674565

The present knowledge of stellar evolution is still limited today by large uncertainties that derive from the complex multi-dimensional processes occurring in stars. Among them, the turbulent motions of the stellar fluid control the size and evolutio... Read More about Hydrodynamic simulations of convection and nucleosynthesis in the late phases of massive stars to constrain and guide stellar evolution theory.

The dynamics of star formation in the local Milky Way as traced by OB associations (2023)
Thesis
Quintana Isasi, A. L. P. (2023). The dynamics of star formation in the local Milky Way as traced by OB associations. (Thesis). Keele University

OB associations are gravitationally unbound, low-density groups of young stars delineated by bright OB stars. At the intersection of star formation and Galactic structure, they are important across many areas of astronomy. However, most historical OB... Read More about The dynamics of star formation in the local Milky Way as traced by OB associations.

The Chandra Cygnus OB2 Legacy Survey: Design and X-Ray Point-source Catalog (2023)
Journal Article
Wright, N. J., Drake, J. J., Guarcello, M. G., Aldcroft, T. L., Kashyap, V. L., Damiani, F., …Fruscione, A. (2023). The Chandra Cygnus OB2 Legacy Survey: Design and X-Ray Point-source Catalog. Astrophysical Journal Supplement, 269(1), Article 7. https://doi.org/10.3847/1538-4365/acdd62

The Cygnus OB2 association is the largest concentration of young and massive stars within 2 kpc of the Sun, including an estimated ∼65 O-type stars and hundreds of OB stars. The Chandra Cygnus OB2 Legacy Survey is a large imaging program undertaken w... Read More about The Chandra Cygnus OB2 Legacy Survey: Design and X-Ray Point-source Catalog.

Simulating the Sensitivity to Stellar Point Sources of Chandra X-Ray Observations (2023)
Journal Article
Wright, N. J., Drake, J. J., Guarcello, M. G., Kashyap, V. L., & Zezas, A. (2023). Simulating the Sensitivity to Stellar Point Sources of Chandra X-Ray Observations. Astrophysical Journal Supplement, 269(1), Article 8. https://doi.org/10.3847/1538-4365/acdd63

The Chandra Cygnus OB2 Legacy Survey is a wide and deep X-ray survey of the nearby and massive Cygnus OB2 association. The survey has detected ∼8000 X-ray sources, the majority of which are pre-main-sequence X-ray-emitting young stars in the associat... Read More about Simulating the Sensitivity to Stellar Point Sources of Chandra X-Ray Observations.

Optical and Infrared Counterparts of the X-Ray Sources Detected in the Chandra Cygnus OB2 Legacy Survey (2023)
Journal Article
Guarcello, M. G., Drake, J. J., Wright, N. J., Naylor, T., Flaccomio, E., Kashyap, V. L., & García-Alvarez, D. (2023). Optical and Infrared Counterparts of the X-Ray Sources Detected in the Chandra Cygnus OB2 Legacy Survey. Astrophysical Journal Supplement, 269(1), 9. https://doi.org/10.3847/1538-4365/acdd64

The young massive OB association Cygnus OB2, in the Cygnus X complex, is the closest (∼1400 pc) star-forming region to the Sun hosting thousands of young low-mass stars and up to 1000 OB stars, among which are some of the most massive stars known in... Read More about Optical and Infrared Counterparts of the X-Ray Sources Detected in the Chandra Cygnus OB2 Legacy Survey.

A new method for spatially resolving the turbulence driving mixture in the ISM with application to the Small Magellanic Cloud (2023)
Journal Article
Gerrard, I. A., Federrath, C., Pingel, N. M., McClure-Griffiths, N. M., Marchal, A., Joncas, G., …Lynn, C. (2023). A new method for spatially resolving the turbulence driving mixture in the ISM with application to the Small Magellanic Cloud. Monthly Notices of the Royal Astronomical Society, 526(1), https://doi.org/10.1093/mnras/stad2718

Turbulence plays a crucial role in shaping the structure of the interstellar medium. The ratio of the three-dimensional density contrast ($\sigma _{\rho /\rho _0}$) to the turbulent sonic Mach number ($\mathcal {M}$) of an isothermal, compressible ga... Read More about A new method for spatially resolving the turbulence driving mixture in the ISM with application to the Small Magellanic Cloud.

Three Saturn-mass planets transiting F-type stars revealed with TESS and HARPS: TOI-615b, TOI-622b, and TOI-2641b (2023)
Journal Article
Psaridi, A., Bouchy, F., Lendl, M., Akinsanmi, B., Stassun, K. G., Smalley, B., …Zapata, A. (2023). Three Saturn-mass planets transiting F-type stars revealed with TESS and HARPS: TOI-615b, TOI-622b, and TOI-2641b. Astronomy & Astrophysics, 675, A39. https://doi.org/10.1051/0004-6361/202346406

While the sample of confirmed exoplanets continues to grow, the population of transiting exoplanets around early-type stars is still limited. These planets allow us to investigate the planet properties and formation pathways over a wide range of stel... Read More about Three Saturn-mass planets transiting F-type stars revealed with TESS and HARPS: TOI-615b, TOI-622b, and TOI-2641b.

Fundamental parameters of very low mass stars in eclipsing binary star systems observed with the CHEOPS satellite (2023)
Thesis
Swayne, M. I. (2023). Fundamental parameters of very low mass stars in eclipsing binary star systems observed with the CHEOPS satellite. (Thesis). Keele University

Observations of low-mass stars have frequently shown unexpectedly large stellar radii when compared to the predictions from theoretical stellar structure models. This “radius inflation” problem may have consequences not just for stellar science but a... Read More about Fundamental parameters of very low mass stars in eclipsing binary star systems observed with the CHEOPS satellite.

Deciphering the atmospheric properties of hot gas giant exoplanets via ground-based transmission spectroscopy (2023)
Thesis
Spyratos, P. (2023). Deciphering the atmospheric properties of hot gas giant exoplanets via ground-based transmission spectroscopy. (Thesis). Keele University

Transiting hot gas giant exoplanets are great targets for atmospheric investigations due to their extended atmospheres and their strong obscuring effect on the observed starlight when they pass in front of their host star. Transmission spectroscopy c... Read More about Deciphering the atmospheric properties of hot gas giant exoplanets via ground-based transmission spectroscopy.

Radio and infrared surveys for active galactic nuclei behind the Magellanic Clouds (2023)
Thesis
Pennock, C. M. (2023). Radio and infrared surveys for active galactic nuclei behind the Magellanic Clouds. (Thesis). Keele University

I present an analysis of a new 120 deg2 radio continuum image of the Large Magellanic Cloud (LMC) at 888 MHz with a bandwidth of 288 MHz and beam size of 13.′′9×12.′′1, from the Australian Square Kilometre Array Pathfinder (ASKAP). I constructed a ca... Read More about Radio and infrared surveys for active galactic nuclei behind the Magellanic Clouds.

Machine learning identification of massive young stellar objects in Local Group galaxies (2023)
Thesis
Kinson, D. A. (2023). Machine learning identification of massive young stellar objects in Local Group galaxies. (Thesis). Keele University

This thesis presents the development and implementation of a machine learning classification of massive Young Stellar Objects (YSOs) in two Local Group galaxies, NGC6822 and M33. Using archival near- and far-IR data, point sources in both galaxies ar... Read More about Machine learning identification of massive young stellar objects in Local Group galaxies.

Fundamental effective temperature measurements for eclipsing binary stars – IV. Selection of new benchmark stars and first results for HD 22064 (2023)
Journal Article
Maxted. (2023). Fundamental effective temperature measurements for eclipsing binary stars – IV. Selection of new benchmark stars and first results for HD 22064. Monthly Notices of the Royal Astronomical Society, 522(2), 2683 - 2695. https://doi.org/10.1093/mnras/stad1112

I describe the selection and initial characterization of 20 eclipsing binary stars that are suitable for calibration and testing of stellar models and data analysis algorithms used by the PLATO mission and spectroscopic surveys. The binary stars sele... Read More about Fundamental effective temperature measurements for eclipsing binary stars – IV. Selection of new benchmark stars and first results for HD 22064.

Power-2 limb-darkening coefficients for the uvby, UBVRIJHK, SDSS ugriz, Gaia, Kepler, TESS, and CHEOPS photometric systems II. PHOENIX spherically symmetric stellar atmosphere models. (2023)
Journal Article
Claret, A., & Southworth, J. (2023). Power-2 limb-darkening coefficients for the uvby, UBVRIJHK, SDSS ugriz, Gaia, Kepler, TESS, and CHEOPS photometric systems II. PHOENIX spherically symmetric stellar atmosphere models. Astronomy & Astrophysics, 674, Article A63. https://doi.org/10.1051/0004-6361/202346478

Context. The phenomenon of limb-darkening is relevant to many topics in astrophysics, including the analysis of light curves of eclipsing binaries, optical interferometry, measurement of stellar diameters, line profiles of rotating stars, gravitation... Read More about Power-2 limb-darkening coefficients for the uvby, UBVRIJHK, SDSS ugriz, Gaia, Kepler, TESS, and CHEOPS photometric systems II. PHOENIX spherically symmetric stellar atmosphere models..

Another shipment of six short-period giant planets from TESS (2023)
Journal Article
Rodriguez, J. E., Quinn, S. N., Vanderburg, A., Zhou, G., Eastman, J. D., Thygesen, E., …Zobel, E. (2023). Another shipment of six short-period giant planets from TESS. Monthly Notices of the Royal Astronomical Society, 521(2), 2765-2785. https://doi.org/10.1093/mnras/stad595

We present the discovery and characterization of six short-period, transiting giant planets from NASA's Transiting Exoplanet Survey Satellite (TESS) -- TOI-1811 (TIC 376524552), TOI-2025 (TIC 394050135), TOI-2145 (TIC 88992642), TOI-2152 (TIC 3953932... Read More about Another shipment of six short-period giant planets from TESS.

3D stellar evolution: hydrodynamic simulations of a complete burning phase in a massive star (2023)
Journal Article
Rizzuti, F., Hirschi, R., Arnett, W. D., Georgy, C., Meakin, C., Murphy, A. S., …Varma, V. (2023). 3D stellar evolution: hydrodynamic simulations of a complete burning phase in a massive star. Monthly Notices of the Royal Astronomical Society, 523(2), 2317-2328. https://doi.org/10.1093/mnras/stad1572

Our knowledge of stellar evolution is driven by one-dimensional (1D) simulations. 1D models, however, are severely limited by uncertainties on the exact behaviour of many multidimensional phenomena occurring inside stars, affecting their structure an... Read More about 3D stellar evolution: hydrodynamic simulations of a complete burning phase in a massive star.

Kinematics of stellar substructures in the small magellanic cloud (2023)
Journal Article
El Youssoufi, D., Cioni, M. L., Kacharov, N., Bell, C. P. M., Matjevic, G., Bekki, K., …van Loon, J. T. (2023). Kinematics of stellar substructures in the small magellanic cloud. Monthly Notices of the Royal Astronomical Society, 523(1), 347-364. https://doi.org/10.1093/mnras/stad1339

We present a kinematic analysis of the Small Magellanic Cloud using 3700 spectra extracted from the European Southern Observatory archive. We used data from Gaia and near-infrared photometry to select stellar populations and discard Galactic foregrou... Read More about Kinematics of stellar substructures in the small magellanic cloud.