University of St Andrews

Measuring masses of transiting Earth-like planets: first insights from the PLATO RV data challenge

M. Cretignier, N. C. Hara, S. Aigrain +24

The PLATO Stellar Variability Mitigation Working Group designed a radial-velocity (RV) data challenge to assess the precision and accuracy achievable on RV semi-amplitudes in the c…

Non-Axisymmetric Pillar Structures due to Embedded Stars in AGN Accretion Discs

Jiamu Huang, Douglas N. C. Lin, Keith Horne

Gravitationally unstable outer regions of AGN discs may host in situ formation of massive stars whose heating produces localized vertical "pillars" on the disc surface, in the same…

Leveraging Impact Parameter to Mitigate the Transit Light Source Effect: Early Insights from TRAPPIST-1

Ana Glidden, Alexander I. Shapiro, Sara Seager +19

Stellar activity complicates exoplanet transmission spectra, particularly for smaller planets around M dwarfs with JWST. The transit light source (TLS) effect, the imprinting of sp…

astro-ph.IM2026

Connecting Granulation and Magnetic Activity in Radial Velocities: The Next Breakthrough for High-Precision Spectroscopy

Ancy Anna John, Khaled Al Moulla, Federica Rescigno +5

Stellar variability has become the dominant limitation to achieving the radial velocity (RV) precision required for the detection and characterization of Earth-like exoplanets. Whi…

cond-mat.mes-hall2026

Flux-tunable global and local superconductivity in a topological insulator nano-SQUID

Ella Nikodem, Jakob Schluck, Michał Papaj +5

Topological systems are defined by global properties that enforce the existence of local boundary modes. Three-dimensional topological insulators (TIs) were among the earliest prop…

JWST PRIMER: Post-starburst galaxies dominate the low-mass quiescent galaxy population since z~2

Thomas de Lisle, David T. Maltby, Omar Almaini +10

We present the evolution of the stellar mass functions for photometrically selected star-forming, passive and post-starburst galaxies, based on JWST PRIMER observations of the Ultr…

The Fe I 4377 Å Line as a Solar Faculae Indicator: Insights from Spectral Ratio Analysis

Katlyn L. Hobbs, Christopher A. Watson, Jean C. Costes +21

Faculae are a dominant source of stellar activity noise in radial velocity measurements, yet their low contrast and broad surface distribution make them difficult to track in disc-…

physics.soc-ph2026★ 8 cited

Beyond the Fundamental Metallicity Relation: galaxy sizes encode the link between inflow and metallicity

N. F. Boardman, V. Wild, D. Scholte +3

Gas-phase chemical abundances are key observable consequences of galaxy evolution, being intrinsically tied to galaxy formation histories. Gas metallicity rises with increasing ste…

Degree correlations in graphs with clique clustering

Peter Mann, V. Anne Smith, John B. O. Mitchell +1

Correlations among the degrees of vertices in random graphs often occur when clustering is present. In this paper we define a joint-degree correlation function for vertices in the…

physics.soc-ph2026★ 2 cited

An exact N-strain epidemic model using bond percolation

Peter Mann, V. Anne Smith, John B. O. Mitchell +1

In this paper we examine the emergent structures of random networks that have undergone bond percolation an arbitrary, but finite, number of times. We define two types of sequentia…

Understanding eccentric temperate giants: an in-depth study of the architecture and stellar obliquity of the TOI-2134 system

Federica Rescigno, Manu Stalport, Ancy Anna John +28

We revisit the TOI-2134 planetary system with three new high-cadence TESS sectors and 98 more spectra. This new analysis confirms the two orbiting planets by simultaneously modelli…

No hidden monsters: Probing recently-quenched galaxies for obscured AGN with JWST-PRIMER MIRI and NIRCam

Guillaume Hewitt, Omar Almaini, David Maltby +13

We investigate the role of obscured active galactic nuclei (AGN) in recently quenched post-starburst galaxies (PSBs), using a sample of 65 photometrically selected PSBs in the PRIM…

astro-ph.EP2026★ 3 cited

Aerosols and hydrocarbons in the atmosphere of a white dwarf planet

Ryan J. MacDonald, Christopher E. O'Connor, Victoria A. Boehm +15

Most stars, including our Sun, will one day evolve into red giants and, subsequently, white dwarfs. Several planet candidates have recently been identified orbiting white dwarfs, d…

The multiwavelength structure of post-starburst galaxies at 0.5 < z < 3 with JWST PRIMER: compact morphologies and residual disturbances

David T. Maltby, Omar Almaini, Vivienne Wild +9

We investigate the multi-wavelength structure of recently quenched post-starburst (PSB) galaxies at 0.5 < z < 3, using photometrically selected samples from the Ultra Deep Survey (…

TOI-6884b: A low-mass brown dwarf transiting a slightly evolved star

Akanksha Khandelwal, Shubhendra Nath Das, Rishikesh Sharma +42

We report the discovery of a low-mass transiting brown dwarf orbiting TOI-6884 (TIC~156514476, $T_{mag} = 11.4$ ) from NASA's \textit{Transiting Exoplanet Survey Satellite} (\text…

Corotating Interaction Regions (CIRs): evolution over a solar lifetime

Rose F. P. Waugh, Moira Jardine

Corotating Interaction Regions (CIRs) are persistent structures in stellar winds that arise from the interaction between fast and slow wind streams. They are known to generate shoc…

astro-ph.SR2026★ 2 cited

Solar flare ribbons structured by uncombed chromospheric loops

L. P. Chitta, E. R. Priest, David Orozco Suárez +33

A part of the magnetic energy released during a flare is transported to the lower atmosphere. High-resolution observations show that flare ribbons, sites of energy deposition at th…

physics.soc-ph2026★ 1 cited

X-Shooter survey of disk accretion in Upper Scorpius II. A lack of correlation between accretion rates and disk properties

A. Empey, C. F. Manara, R. Garcia Lopez +19

The evolution of protoplanetary discs is intertwined with the process of planet formation, growth and migration. Studies of nearby star forming regions of different ages and proper…

Hypergraphx-data: a repository for higher-order network data

Quintino Francesco Lotito, Lorenzo Betti, Berné Nortier +2

The availability of network datasets advances research in network science, machine learning and related fields by enabling empirical analyses and their reproducibility, algorithm d…

Tracing Radio AGN-Driven Quenching in Post-Starburst Galaxies at Cosmic Noon

Pallavi Patil, Kate Rowlands, Katherine Alatalo +14

We present a radio continuum study of photometrically selected cosmic noon (0.5<z<3) post-starburst galaxies (PSBs) in the UKIDSS Deep Survey (UDS) field to assess if radio-mode Ac…

Weighing the mass of LHS 3844 b

Alejandro Hacker, Nicola Astudillo-Defru, Rodrigo F. Díaz +7

Context: LHS 3844 b (TOI-136 b) is a ultra short-period, Earth-size exoplanet detected by TESS. It is one of the most favourable object for atmospheric characterisation and the stu…