Three-dimensional structure of a sunspot light bridge
Context. Active regions are the most prominent manifestations of solar magnetic fields; their generation and dissipation are fundamental problems in solar...
Through thick and thin: Structure of the Galactic thick disc from extragalactic surveys
Context. We aim to understand the accretion history of the Milky Way by exploring the vertical and radial properties of the Galactic thick disc. Aims: We study...
Through Thick and Thin—H I Absorption in Cosmological Simulations
We investigate the column density distribution function of neutral hydrogen at redshift z = 3 using a cosmological simulation of galaxy formation from the...
Time Delay in QSO 0957+561 From 1984-1999 Optical Data
Photometric optical data of QSO 0957+561 covering the period 1984-1999 are analyzed to discern between the two values of the time delay (417 and 424 days)...
Time Series Analysis of Long Term Full Disk Observations Of The Mn I 539.4 nm Solar Line
The equivalent width and central depth data of Mn 539.4 nm solar spectral line, observed in the period from 1979 to 1992 at Kitt Peak Observatory, was analyzed...
TMCalc - a fast code to derive Teff and [Fe/H] for FGK stars
We present a new direct spectroscopic calibration for a fast estimation of the stellar metallicity [Fe/H]. This calibration was computed using a large sample of...
TOI-1442 b and TOI-2445 b: Two potentially rocky ultra-short period planets around M dwarfs
Context. Exoplanets with orbital periods of less than one day are known as ultra-short period (USP) planets. They are relatively rare products of planetary...
TOI-2266 b: A keystone super-Earth at the edge of the M dwarf radius valley
We validate the Transiting Exoplanet Survey Satellite (TESS) object of interest TOI-2266.01 (TIC 8348911) as a small transiting planet (most likely a super...
TOI-519 b: A short-period substellar object around an M dwarf validated using multicolour photometry and phase curve analysis
Context. We report the discovery of TOI-519 b (TIC 218795833), a transiting substellar object (R = 1.07 R Jup) orbiting a faint M dwarf (V = 17.35) on a 1.26 d...