Search Publications
TOI-5344 b: A Saturn-like Planet Orbiting a Super-solar Metallicity M0 Dwarf
Kobulnicky, Henry A.; Cochran, William D.; Endl, Michael +19 more
We confirm the planetary nature of TOI-5344 b as a transiting giant exoplanet around an M0-dwarf star. TOI-5344 b was discovered with the Transiting Exoplanet Survey Satellite photometry and confirmed with ground-based photometry (the Red Buttes Observatory 0.6 m telescope), radial velocity (the Habitable-zone Planet Finder), and speckle imaging (…
Solar Flares and Magnetic Helicity
Toriumi, Shin; Park, Sung-Hong
Solar flares and coronal mass ejections are the largest energy-releasing phenomena in the current solar system. They cause drastic enhancements of electromagnetic waves of various wavelengths and sometimes eject coronal material into interplanetary space, disturbing the magnetic surroundings of orbiting planets, including the Earth. It is generall…
High contrast at short separation with VLTI/GRAVITY: Bringing Gaia companions to light
Lutz, D.; Genzel, R.; Sturm, E. +171 more
Context. Since 2019, GRAVITY has provided direct observations of giant planets and brown dwarfs at separations of down to 95 mas from the host star. Some of these observations have provided the first direct confirmation of companions previously detected by indirect techniques (astrometry and radial velocities). Aims. We want to improve the observi…
Resolving the Mechanical and Radiative Feedback in J1044+0353 with Keck Cosmic Web Imager Spectral Mapping
Martin, Crystal L.; Peng, Zixuan; Li, Yuan
We present integral field spectroscopy toward and around J1044+0353, a rapidly growing, low-metallicity galaxy that produces extreme [O III] line emission. A new map of the O32 flux ratio reveals a density-bounded ionization cone emerging from the starburst. The interaction of the hydrogen-ionizing radiation, produced by the very young starburst, …
Uncovering the first-infall history of the LMC through its dynamical impact in the Milky Way halo
Tian, Hao; Ting, Yuan-Sen; Chang, Jiang +2 more
The gravitational interactions between the LMC and the Milky Way cause dynamical perturbations in the MW halo, leading to biased distributions of stellar density and kinematics. We run 50 high-resolution N-body simulations exploring varying masses and halo shapes of the MW and LMC to study the evolution of LMC-induced perturbations. By measuring m…
A Multiwavelength, Multiepoch Monitoring Campaign of Accretion Variability in T Tauri Stars from the ODYSSEUS Survey. II. Photometric Light Curves
Kóspál, Ágnes; Calvet, Nuria; Espaillat, Catherine C. +8 more
Classical T Tauri stars (CTTSs) are young, low-mass stars that accrete material from their surrounding protoplanetary disk. To better understand accretion variability, we conducted a multiepoch, multiwavelength photometric monitoring campaign of four CTTSs, TW Hya, RU Lup, BP Tau, and GM Aur, in 2021 and 2022, contemporaneous with Hubble Space Tel…
The first analysis of three long-period low mass-ratio contact binaries
Wang, Xi; Guo, Ya-Ni; Li, Kai +9 more
The photometric and spectroscopic studies of three contact binaries, ASASSN-V J052036.28+144711.0, ASASSN-V J064846.22+241709.9, and ASASSN-V J073441.02+555833.0 were performed for the first time. The periods of all the three targets are longer than 0.5 d, and we discovered that their mass ratios are all smaller than 0.25. So, they are long-period…
Understanding the relative importance of magnetic field, gravity, and turbulence in star formation at the hub of the giant molecular cloud G148.24+00.41
Wang, Jia-Wei; Eswaraiah, Chakali; Zavagno, A. +10 more
The relative importance of magnetic fields, turbulence, and gravity in the early phases of star formation is still not well understood. We report the first high-resolution dust polarization observations at 850 $\mu$m around the most massive clump, located at the hub of the Giant Molecular Cloud G148.24+00.41, using SCUBA-2/POL-2 at the James Clerk…
The Brown Dwarf Kinematics Project (BDKP). VI. Ultracool Dwarf Radial and Rotational Velocities from SDSS/APOGEE High-resolution Spectroscopy
Brownstein, Joel R.; Cunha, Katia; Gelino, Christopher R. +11 more
We present precise measurements of radial (RV) and projected rotational (
On an apparent dearth of recurrent nova super-remnants in the Local Group
Darnley, M. J.; Shara, M. M.; Healy-Kalesh, M. W.
The Andromeda Galaxy is home to the annually erupting recurrent nova (RN) M 31N 2008-12a (12a); the first nova found to host a nova super-remnant (NSR). An NSR is an immense structure surrounding a RN, created from many millions of eruptions sweeping up material in the local environment to form a shell tens of parsecs across. Theory has demonstrat…