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The Detection and Investigation of Exoplanets with MASTER Global Network Telescopes
Buckley, D. A. H.; Lipunov, V. M.; Budnev, N. M. +13 more
The paper presents the method for detecting exoplanets in the image archive obtained by telescopes of the MASTER Global Network since 2002. The unique archive represents homogeneous photometric data obtained over 20 years for the northern (MASTER-Amur, MASTER-Tunka, MASTER-Kislovodsk, M-ASTER-Tavrida, MASTER-IAC, MASTER-OAGH) and 11 years for the …
Fundamental effective temperature measurements for eclipsing binary stars - V. The circumbinary planet system EBLM J0608-59
Maxted, P. F. L.; Martin, D. V.; Triaud, A. H. M. J. +3 more
EBLM J0608$-$59/TOI-1338/BEBOP-1 is a 12$^{\rm th}$-magnitude, F9 V star in an eclipsing binary with a much fainter M dwarf companion on a wide, eccentric orbit (P = 14.6 d). The binary is orbited by two circumbinary planets: one transiting on a 95-d orbit and one non-transiting on a 215-d orbit. We have used high-precision photometry from the TES…
PSR J1227‑6208 and its massive white dwarf companion: Pulsar emission analysis, timing update, and mass measurements
Freire, Paulo C. C.; Kramer, Michael; Champion, David J. +7 more
PSR J1227‑6208 is a 34.53-ms recycled pulsar with a massive companion. This system has long been suspected to belong to the emerging class of massive recycled pulsar‑ONeMg white dwarf systems such as PSR J2222‑0137, PSR J1528‑3146, and J1439‑5501. Here, we present an updated emission and timing analysis with more than 11 years of combined Parkes a…
The Venus Global Ionosphere-Thermosphere Model (V-GITM): A Coupled Thermosphere and Ionosphere Formulation
Bougher, Stephen W.; Ridley, Aaron J.; Ponder, Brandon M. +2 more
This paper introduces the new Venus global ionosphere-thermosphere model (V-GITM) which incorporates the terrestrial GITM framework with Venus-specific parameters, ion-neutral chemistry, and radiative processes in order to simulate some of the observable features regarding the temperatures, composition, and dynamical structure of the Venus atmosph…
Assessment of SDSS-derived Galaxy Morphologies Using HST Imaging
Salim, Samir; Osborne, Chandler
The Sloan Digital Sky Survey (SDSS) was foundational to the study of galaxy evolution, having revealed the bimodality of galaxies and the relationship between their structure and star-forming activity. However, ground-based optical surveys like SDSS are limited in resolution and depth, which may lead to biases or poor quality in the derived morpho…
Massive Quiescent Disk Galaxies at 0.5 ≤ z ≤ 1 in CANDELS: Color Gradients and Likely Origin
Cui, Qifan; Liu, F. S.; Zhao, Pinsong
A rare population of massive disk-dominated quiescent galaxies has recently drawn much attention, which intrudes the red sequence (RS) population without destroying the underlying stellar disks. In this study, we have carefully identified 48 RS, disk-dominated galaxies with M * > 1010 M ⊙ between redshift 0.5 an…
Period–Luminosity–Metallicity–Color Relations of Late-type Contact Binaries in the Big Data Era
Tian, Zhi-Jia; Song, Lian-Yun
Binary stars ubiquitous throughout the Universe are important. Contact binaries (CBs) possessing period–luminosity (PL) relations could be adopted as distance tracers. The PL relations of CBs are influenced by metallicity abundance and color index, which are connected to both the radius and luminosity of stars. Here we propose fine relations of th…
Heavy element abundances in galactic globular clusters
Cescutti, G.; Carretta, E.; Lucatello, S. +1 more
Context. Globular clusters are considered key objects for understanding the formation and evolution of the Milky Way. In this sense, the characterisation of their chemical and orbital parameters can provide constraints on chemical evolution models of the Galaxy.
Aims: We use the heavy element abundances of globular clusters to trace their ove…
Long-term Doppler imaging of the star XX Trianguli indicates chaotic non-periodic dynamo
Strassmeier, K. G.; Weber, M.; Granzer, T. +1 more
Sunspots are the most well-known manifestations of solar magnetic fields and exhibit a range of phenomena related to the interior dynamo. Starspots are the direct analogs of sunspots on other stars but with the big observational restriction that we usually cannot resolve other star's surfaces. In this paper we employ an indirect surface imaging te…
The Dynamics of CO2-Driven Granular Flows in Gullies on Mars
Iversen, Jens Jacob; Conway, Susan J.; Kleinhans, Maarten G. +10 more
Martian gullies are landforms consisting of an erosional alcove, a channel, and a depositional apron. A significant proportion of Martian gullies at the mid-latitudes is active today. The seasonal sublimation of CO2 ice has been suggested as a driver behind present-day gully activity. However, due to a lack of in situ observations, the …