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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.

An investigation into the biosynthesis of cuticular hydrocarbons in British ants using isotopically labelled diets and gas chromatography - mass spectrometry (2021)
Thesis
Shemilt, S. J. An investigation into the biosynthesis of cuticular hydrocarbons in British ants using isotopically labelled diets and gas chromatography - mass spectrometry. (Thesis). Keele University. https://keele-repository.worktribe.com/output/421296

Ants are one of only four groups which can be classed as being truly social, that is they demonstrate altruistic behaviours towards nestmates. However in order to do this there must be a complex nestmate recognition signal at work. This signal is gen... Read More about An investigation into the biosynthesis of cuticular hydrocarbons in British ants using isotopically labelled diets and gas chromatography - mass spectrometry.

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.

Revisiting the Cygnus OB associations (2021)
Journal Article
Wright. (2021). Revisiting the Cygnus OB associations. Monthly Notices of the Royal Astronomical Society, 2370 - 2385. https://doi.org/10.1093/mnras/stab2663

OB associations play an important role in Galactic evolution, though their origins and dynamics remain poorly studied, with only a small number of systems analysed in detail. In this paper, we revisit the existence and membership of the Cygnus OB ass... Read More about Revisiting the Cygnus OB associations.

UVES analysis of red giants in the bulge globular cluster NGC 6522 (2021)
Journal Article
Hirschi. (2021). UVES analysis of red giants in the bulge globular cluster NGC 6522. Astronomy & Astrophysics, https://doi.org/10.1051/0004-6361/202140815

Context. NGC 6522 is a moderately metal-poor bulge globular cluster ([Fe/H] ~ -1.0), and it is a well-studied representative among a number of moderately metal-poor blue horizontal branch clusters located in the bulge. The NGC 6522 abundance pattern... Read More about UVES analysis of red giants in the bulge globular cluster NGC 6522.

The ultra-hot-Jupiter KELT-16 b: Dynamical Evolution and Atmospheric Properties (2021)
Journal Article
Mancini, L., Southworth, J., Naponiello, L., Baştürk, Ö., Barbato, D., Biagiotti, F., Bruni, I., Cabona, L., D’Ago, G., Damasso, M., Erdem, A., Evans, D., Henning, T., Öztürk, O., Ricci, D., Sozzetti, A., Tregloan-Reed, J., & Yalçınkaya, S. (2022). The ultra-hot-Jupiter KELT-16 b: Dynamical Evolution and Atmospheric Properties. Monthly Notices of the Royal Astronomical Society, 509(1), https://doi.org/10.1093/mnras/stab2691

<jats:title>Abstract</jats:title> <jats:p>We present broad-band photometry of 30 planetary transits of the ultra-hot Jupiter KELT-16 b, using five medium-class telescopes. The transits were monitored through standard B,?V,?R,?I filters and four were... Read More about The ultra-hot-Jupiter KELT-16 b: Dynamical Evolution and Atmospheric Properties.

Multidimensional low-Mach number time-implicit hydrodynamic simulations of convective helium shell burning in a massive star (2021)
Journal Article
Hirschi. (2021). Multidimensional low-Mach number time-implicit hydrodynamic simulations of convective helium shell burning in a massive star. Astronomy & Astrophysics, 1-24. https://doi.org/10.1051/0004-6361/202140825

Context. A realistic parametrization of convection and convective boundary mixing in conventional stellar evolution codes is still the subject of ongoing research. To improve the current situation, multidimensional hydrodynamic simulations are used t... Read More about Multidimensional low-Mach number time-implicit hydrodynamic simulations of convective helium shell burning in a massive star.

Radio continuum sources behind the Large Magellanic Cloud (2021)
Journal Article
Van Loon. (2021). Radio continuum sources behind the Large Magellanic Cloud. Monthly Notices of the Royal Astronomical Society, 2885 - 2904. https://doi.org/10.1093/mnras/stab2249

We present a comprehensive multifrequency catalogue of radio sources behind the Large Magellanic Cloud (LMC) between 0.2 and 20 GHz, gathered from a combination of new and legacy radio continuum surveys. This catalogue covers an area of ~144 deg2 at... Read More about Radio continuum sources behind the Large Magellanic Cloud.

Exploiting timing capabilities of the CHEOPS mission with warm-Jupiter planets (2021)
Journal Article
Maxted. (2021). Exploiting timing capabilities of the CHEOPS mission with warm-Jupiter planets. Monthly Notices of the Royal Astronomical Society, 3810 - 3830. https://doi.org/10.1093/mnras/stab1782

We present 17 transit light curves of seven known warm-Jupiters observed with the CHaracterising ExOPlanet Satellite (CHEOPS). The light curves have been collected as part of the CHEOPS Guaranteed Time Observation (GTO) program that searches for tran... Read More about Exploiting timing capabilities of the CHEOPS mission with warm-Jupiter planets.

The EBLM project - VIII. First results for M-dwarf mass, radius, and effective temperature measurements using CHEOPS light curves (2021)
Journal Article
Hellier, & Maxted. (2021). The EBLM project - VIII. First results for M-dwarf mass, radius, and effective temperature measurements using CHEOPS light curves. Monthly Notices of the Royal Astronomical Society, 306 - 322. https://doi.org/10.1093/mnras/stab1687

The accuracy of theoretical mass, radius, and effective temperature values for M-dwarf stars is an active topic of debate. Differences between observed and theoretical values have raised the possibility that current theoretical stellar structure and... Read More about The EBLM project - VIII. First results for M-dwarf mass, radius, and effective temperature measurements using CHEOPS light curves.

The VMC survey – XLIV: Mapping metallicity trends in the large magellanic cloud using near-infrared passbands (2021)
Journal Article
Choudhury, S., de Grijs, R., Bekki, K., Cioni, M.-R. L., Ivanov, V. D., Van Loon, J. T., Miller, A. E., Niederhofer, F., Oliveira, J. M., Ripepi, V., Sun, N.-C., & Subramanian, S. (2021). The VMC survey – XLIV: Mapping metallicity trends in the large magellanic cloud using near-infrared passbands. Monthly Notices of the Royal Astronomical Society, 507(4), 4752-4763. https://doi.org/10.1093/mnras/stab2446

We have derived high-spatial-resolution metallicity maps covering ~105 deg2 across the Large Magellanic Cloud (LMC) using near-infrared passbands from the VISTA Survey of the Magellanic Clouds. We attempt to understand the metallicity distribution an... Read More about The VMC survey – XLIV: Mapping metallicity trends in the large magellanic cloud using near-infrared passbands.

A Potential Barrier Halting Spherically Symmetric Relativistic Gravitational Collapse (2021)
Book Chapter
Austin, J. C. (2021). A Potential Barrier Halting Spherically Symmetric Relativistic Gravitational Collapse. In Research Trends and Challenges in Physical Science (101-113). BP International. https://doi.org/10.9734/bpi/rtcps/v1/4203f

Discussion: Scholarly discussion on any scientific article or Book or Book chapter is very important for the advancement of science. We strongly suggest all readers and authors to participate in such activities. Comment posting facility is available... Read More about A Potential Barrier Halting Spherically Symmetric Relativistic Gravitational Collapse.

Massive young stellar objects in the Local Group irregular galaxy NGC6822 identified using machine learning (2021)
Journal Article
Kinson, D. A., Oliveira, J., & Van Loon, J. (2021). Massive young stellar objects in the Local Group irregular galaxy NGC6822 identified using machine learning. Monthly Notices of the Royal Astronomical Society, 507(4), 5106 - 5131. https://doi.org/10.1093/mnras/stab2386

We present a supervised machine learning methodology to classify stellar populations in the Local Group dwarf-irregular galaxy NGC?6822. Near-IR colours (J - H, H - K, and J - K), K-band magnitudes and far-IR surface brightness (at 70 and 160?µm) mea... Read More about Massive young stellar objects in the Local Group irregular galaxy NGC6822 identified using machine learning.

TOI-431/HIP 26013: a super-Earth and a sub-Neptune transiting a bright, early K dwarf, with a third RV planet (2021)
Journal Article
Osborn, A., Armstrong, D. J., Cale, B., Brahm, R., Wittenmyer, R. A., Dai, F., Crossfield, I. J. M., Bryant, E. M., Adibekyan, V., Cloutier, R., Collins, K. A., Mena, E. D., Fridlund, M., Hellier, C., Howell, S. B., King, G. W., Lillo-Box, J., Otegi, J., Sousa, S., Stassun, K. G., …Zohrabi, F. (2021). TOI-431/HIP 26013: a super-Earth and a sub-Neptune transiting a bright, early K dwarf, with a third RV planet. Monthly Notices of the Royal Astronomical Society, 507(2), 2782 - 2803. https://doi.org/10.1093/mnras/stab2313

We present the bright (Vmag = 9.12), multiplanet system TOI-431, characterized with photometry and radial velocities (RVs). We estimate the stellar rotation period to be 30.5 ± 0.7 d using archival photometry and RVs. Transiting Exoplanet Survey Sate... Read More about TOI-431/HIP 26013: a super-Earth and a sub-Neptune transiting a bright, early K dwarf, with a third RV planet.

Ground-based Transmission Spectroscopy with VLT FORS2: Evidence for Faculae and Clouds in the Optical Spectrum of the Warm Saturn WASP-110b (2021)
Journal Article
Smalley. (2021). Ground-based Transmission Spectroscopy with VLT FORS2: Evidence for Faculae and Clouds in the Optical Spectrum of the Warm Saturn WASP-110b. Astronomical Journal, https://doi.org/10.3847/1538-3881/ac01da

We present a ground-based optical transmission spectrum for the warm Saturn-mass exoplanet WASP-110b from two transit observations made with the FOcal Reducer and Spectrograph on the Very Large Telescope. The spectrum covers the wavelength range from... Read More about Ground-based Transmission Spectroscopy with VLT FORS2: Evidence for Faculae and Clouds in the Optical Spectrum of the Warm Saturn WASP-110b.

TIC 454140642: A Compact, Coplanar, Quadruple-lined Quadruple Star System Consisting of Two Eclipsing Binaries (2021)
Journal Article
Hellier. (2021). TIC 454140642: A Compact, Coplanar, Quadruple-lined Quadruple Star System Consisting of Two Eclipsing Binaries. Astrophysical Journal, 93 - 93. https://doi.org/10.3847/1538-4357/ac04ad

We report the discovery of a compact, coplanar, quadruple-lined, eclipsing quadruple star system from Transiting Exoplanet Survey Satellite data, TIC 454140642, also known as TYC 0074-01254-1. The target was first detected in Sector 5 with a 30-minut... Read More about TIC 454140642: A Compact, Coplanar, Quadruple-lined Quadruple Star System Consisting of Two Eclipsing Binaries.

Optical spectroscopy study of Eu-doped ions in BaAl2O4 phosphors (2021)
Journal Article
Rezende, M. D. S., Valerio, M., Araujo, R., Jackson, R., dos Santos Mattos, E., & dos Santos Junior, B. (2021). Optical spectroscopy study of Eu-doped ions in BaAl2O4 phosphors. Journal of Luminescence, 1-5. https://doi.org/10.1016/j.jlumin.2021.118011

Computational and experimental methodology is employed to study optical properties in Eu-doped BaAl2O4 phosphors. The symmetry and detailed geometry of the Eu-dopant site, predicted by atomistic simulation, are used to calculate the crystal field par... Read More about Optical spectroscopy study of Eu-doped ions in BaAl2O4 phosphors.

OGLE-2018-BLG-1185b: A Low-mass Microlensing Planet Orbiting a Low-mass Dwarf (2021)
Journal Article
Kondo, I., Yee, J. C., Bennett, D. P., Sumi, T., Koshimoto, N., Bond, I. A., Gould, A., Udalski, A., Shvartzvald, Y., Kil Jung, Y., Zang, W., Bozza, V., Bachelet, E., Hundertmark, M. P., Rattenbury, N. J., Abe, F., Barry, R., Bhattacharya, A., Donachie, M., Fukui, A., …Saha, A. (2021). OGLE-2018-BLG-1185b: A Low-mass Microlensing Planet Orbiting a Low-mass Dwarf. Astronomical Journal, 162(2), Article 77. https://doi.org/10.3847/1538-3881/ac00ba

We report an analysis of the planetary microlensing event OGLE-2018-BLG-1185, which was observed by a large number of ground-based telescopes and by the Spitzer Space Telescope. The ground-based light curve indicates a low planet–host star mass ratio... Read More about OGLE-2018-BLG-1185b: A Low-mass Microlensing Planet Orbiting a Low-mass Dwarf.

A search for transiting planets around hot subdwarfs (2021)
Journal Article
Maxted. (2021). A search for transiting planets around hot subdwarfs. Astronomy & Astrophysics, https://doi.org/10.1051/0004-6361/202140381

Context. Hot subdwarfs experienced strong mass loss on the red giant branch (RGB) and are now hot and small He-burning objects. These stars constitute excellent opportunities for addressing the question of the evolution of exoplanetary systems direct... Read More about A search for transiting planets around hot subdwarfs.