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Using Photometrically Derived Properties of Young Stars to Refine TESS's Transiting Young Planet Survey Completeness
Pascucci, Ilaria; Cunha, Katia; Mamajek, Eric E. +7 more
The demographics of young exoplanets can shed light on their formation and evolution processes. Exoplanet properties are derived from the properties of their host stars. As such, it is important to accurately characterize the host stars since any systematic biases in their derivation can negatively impact the derivation of planetary properties. He…
Photometric follow-up of 43 new eclipsing white dwarf plus main-sequence binaries from the ZTF survey
Rebassa-Mansergas, Alberto; Parsons, Steven G.; Pelisoli, Ingrid +12 more
Wide-field time-domain photometric sky surveys are now finding hundreds of eclipsing white dwarf plus M dwarf binaries, a population encompassing a wealth of information and potential insight into white dwarf and close binary astrophysics. Precise follow-up observations are essential in order to fully constrain these systems and capitalize on the …
The MAGPI Survey: impact of environment on the total internal mass distribution of galaxies in the last 5 Gyr
D'Eugenio, Francesco; Tran, Kim-Vy H.; Bland-Hawthorn, Joss +20 more
We investigate the impact of environment on the internal mass distribution of galaxies using the Middle Ages Galaxy Properties with Integral field spectroscopy (MAGPI) survey. We use 2D resolved stellar kinematics to construct Jeans dynamical models for galaxies at mean redshift z ~ 0.3, corresponding to a lookback time of 3-4 Gyr. The internal ma…
Spatially resolved chemodynamics of the starburst dwarf galaxy CGCG 007-025: evidence for recent accretion of metal-poor gas
Sánchez-Janssen, Rubén; Amorín, Ricardo; Papaderos, Polychronis +4 more
Nearby metal-poor starburst dwarf galaxies present a unique opportunity to probe the physics of high-density star formation with a detail and sensitivity unmatched by any observation of the high-z Universe. Here, we present the first results from a chemodynamical study of the nearby, gas-rich starburst dwarf CGCG 007-025. We use VLT/MUSE integral …
The Eruption of a Magnetic Flux Rope Observed by Solar Orbiter and Parker Solar Probe
Long, David M.; Davies, Emma E.; Berghmans, David +11 more
Magnetic flux ropes are a key component of coronal mass ejections, forming the core of these eruptive phenomena. However, determining whether a flux rope is present prior to eruption onset and, if so, the rope's handedness and the number of turns that any helical field lines make is difficult without magnetic field modeling or in situ detection of…
Binary Star Evolution in Different Environments: Filamentary, Fractal, Halo, and Tidal Tail Clusters
Tang, Shih-Yun; Pang, Xiaoying; Li, Chengyuan +7 more
Using membership of 85 open clusters from previous studies based on Gaia Data Release 3 data, we identify binary candidates in the color-magnitude diagram for systems with mass ratio q > 0.4. The binary fraction is corrected for incompleteness at different distances due to the Gaia angular resolution limit. We find a decreasing binary fraction …
Inferences from Surface Brightness Fluctuations of Zwicky 3146 via the Sunyaev-Zel'dovich Effect and X-Ray Observations
Mroczkowski, Tony; Kraft, Ralph; Devlin, Mark +16 more
The galaxy cluster Zwicky 3146 is a sloshing cool-core cluster at z = 0.291 that in Sunyaev-Zel'dovich (SZ) imaging does not appear to exhibit significant pressure substructure in the intracluster medium. We perform a surface brightness fluctuation analysis via Fourier amplitude spectra on SZ (MUSTANG-2) and X-ray (XMM-Newton) images of this clust…
Calibration of the convective parameters in stellar pulsation hydrocodes
Szabó, Róbert; Kovács, Gábor B.; Nuspl, János
Despite the appearance of two- and three-dimensional models thanks to the rapid growth of computing performance, numerical hydrocodes used to model radial stellar pulsations (RSPs) still apply a one-dimensional stellar envelope model without any realistic atmosphere, in which a significant improvement was the inclusion of turbulent convection. How…
A Bayesian estimation of the Milky Way's circular velocity curve using Gaia DR3
Thomas, Guillaume F.; Kipper, Rain; Kolka, Indrek +5 more
Aims: Our goal is to calculate the circular velocity curve of the Milky Way, along with corresponding uncertainties that quantify various sources of systematic uncertainty in a self-consistent manner.
Methods: The observed rotational velocities are described as circular velocities minus the asymmetric drift. The latter is described by th…
Numerical Simulations and Observations of Mg II in the Solar Chromosphere
De Pontieu, Bart; Carlsson, Mats; Hansteen, Viggo H. +3 more
The Mg II h and k lines are among the best diagnostic tools of the upper solar chromosphere. This region of the atmosphere is of particular interest, as it is the lowest region of the Sun's atmosphere where the magnetic field is dominant in the energetics and dynamics, defining its structure. While highly successful in the photosphere and lower to…