Search Publications
Reanalysis of the MACHO Constraints on PBH in the Light of Gaia DR3 Data
García-Bellido, Juan; Hawkins, Michael
The recent astrometric data of hundreds of millions of stars from Gaia DR3 has allowed for a precise determination of the Milky Way rotation curve up to 28 kpc. The data suggest a rapid decline in the density of dark matter beyond 19 kpc. We fit the whole rotation curve with four components (gas, disk, bulge, and halo), and compute the microlensin…
The Magellanic Clouds Are Very Rare in the IllustrisTNG Simulations
Kroupa, Pavel; Haslbauer, Moritz; Banik, Indranil +2 more
The Large and Small Magellanic Clouds (LMC and SMC) form the closest interacting galactic system to the Milky Way, therewith providing a laboratory to test cosmological models in the local Universe. We quantify the likelihood for the Magellanic Clouds (MCs) to be observed within the
Modeling the TESS Light Curve of Ap Si Star MX TrA
Pakhomov, Yury; Potravnov, Ilya; Romanovskaya, Anna +1 more
The TESS light curve of the silicon Ap star MX TrA was modeled using the observational surface distribution of silicon, iron, helium, and chromium obtained previously with the Doppler Imaging technique. The theoretical light curve was calculated using a grid of synthetic fluxes from line-by-line stellar atmosphere models with individual chemical a…
Study of Nonlinear Evolution of Spacetime Fluctuations in Quantum Gravity Inflation for Deriving Primordial Spectrum
Hamada, Ken-ji
We study the evolution of quantum fluctuations of gravity around an inflationary solution in renormalizable quantum gravity, in which the initial scalar-fluctuation dominance is shown by the background-free nature expressed by a special conformal invariance. Inflation ignites at the Planck scale and continues until spacetime phase transition occur…
X-Ray Views of Galactic Accreting Pulsars in High-Mass X-Ray Binaries
Weng, Shan-Shan; Ji, Long
Accreting X-ray pulsars, located in X-ray binaries, are neutron stars with magnetic fields as strong as
The Property of the Gaia Celestial Reference Frame 3 (Gaia-CRF3)
Liu, Guangyi; Guo, Sufen
With the release of Gaia DR3, evaluating the performance and consistency of its reference frame (Gaia-CRF3) with the International Celestial Reference Frame (ICRF3) has become a critical task. Gaia-CRF3 serves as the second non-rotating inertial reference frame in the optical wavelength for the implementation of the International Celestial Referen…
Disk Evolution Study Through Imaging of Nearby Young Stars (DESTINYS): Dynamical Evidence of a Spiral-Arm-Driving and Gap-Opening Protoplanet from SAO 206462 Spiral Motion
Ren, Bin B.; Ménard, François; Bae, Jaehan +8 more
In the early stages of planetary system formation, young exoplanets gravitationally interact with their surrounding environments and leave observable signatures on protoplanetary disks. Among these structures, a pair of nearly symmetric spiral arms can be driven by a giant protoplanet. For the double-spiraled SAO 206462 protoplanetary disk, we obt…