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Halo densities and pericenter distances of the bright Milky Way satellites as a test of dark matter physics
Andrade, Kevin E.; Kaplinghat, Manoj; Valli, Mauro
We provide new constraints on the dark matter halo density profile of Milky Way (MW) dwarf spheroidal galaxies (dSphs) using the phase-space distribution function (DF) method. After assessing the systematics of the approach against mock data from the Gaia Challenge project, we apply the DF analysis to the entire kinematic sample of well-measured M…
Transit spectroscopy of K2-33b with subaru/IRD: Spin-Orbit alignment and tentative atmospheric helium
Tamura, Motohide; Gaidos, Eric; Hirano, Teruyuki +13 more
Exoplanets in their infancy are ideal targets to probe the formation and evolution history of planetary systems, including the planet migration and atmospheric evolution and dissipation. In this paper, we present spectroscopic observations and analyses of two planetary transits of K2-33b, which is known to be one of the youngest transiting planets…
A comparative high-resolution spectroscopic analysis of in situ and accreted globular clusters
Massari, D.; Bellazzini, M.; Mucciarelli, A. +2 more
Globular clusters (GCs) are extremely intriguing systems that help in reconstructing the assembly of the Milky Way via the characterisation of their chemo-chrono-dynamical properties. In this study, we use high-resolution spectroscopic archival data from UVES and UVES-FLAMES at the VLT to compare the chemistry of GCs dynamically tagged as either G…
On the existence of `Maia variables'
Jayaraman, Rahul; Ozuyar, Dogus; Handler, Gerald +5 more
There are different classes of pulsating stars in the H-R diagram. While many of those classes are undisputed, some remain a mystery such as the objects historically called `Maia variables'. Whereas the presence of such a class was suggested seven decades ago, no pulsational driving mechanism is known that could excite short-period oscillations in…
Beyond Point Masses. II. Non-Keplerian Shape Effects Are Detectable in Several TNO Binaries
Grundy, Will; Suggs, Christiana Z.; Proudfoot, Benjamin C. N. +60 more
About 40 trans-Neptunian binaries (TNBs) have fully determined orbits with about 10 others being solved except for breaking the mirror ambiguity. Despite decades of study, almost all TNBs have only ever been analyzed with a model that assumes perfect Keplerian motion (e.g., two point masses). In reality, all TNB systems are non-Keplerian due to no…
Turbulence, and Proton and Electron Heating Rates in the Solar Corona: Analytical Approach
Telloni, Daniele; Zank, Gary P.; Adhikari, Laxman +5 more
Analytical solutions for 2D and slab turbulence energies in the solar corona are presented, including a derivation of the corresponding correlation lengths, with implications for the proton and electron temperatures in the solar corona. These solutions are derived by solving the transport equations for 2D and slab turbulence energies and their cor…
WD 0141-675: a case study on how to follow-up astrometric planet candidates around white dwarfs
Vanderburg, Andrew; Hermes, J. J.; Toonen, Silvia +22 more
This work combines spectroscopic and photometric data of the polluted white dwarf WD 0141-675, which has a now retracted astrometric super-Jupiter candidate, and investigates the most promising ways to confirm Gaia astrometric planetary candidates and obtain follow-up data. Obtaining precise radial velocity measurements for white dwarfs is challen…
A Case Study of Gas Impacted by Black-hole Jets with the JWST: Outflows, Bow Shocks, and High Excitation of the Gas in the Galaxy IC 5063
Malkan, Matthew; Armus, Lee; Spinoglio, Luigi +8 more
We present James Webb Space Telescope MIRI data of the inner ∼3 × 2 kpc2 of the galaxy IC 5063, in which the jets of a supermassive black hole interact with the gaseous disk they are crossing. Jet-driven outflows were known to be initiated along or near the jet path and to modify the stability of molecular clouds, possibly altering thei…
Can early dark energy be probed by the high-redshift galaxy abundance?
Gong, Yan; Wang, Xin; Liu, Weiyang +1 more
The analysis of the cosmic microwave background data acquired by the Atacama Cosmology Telescope and the large-scale ($\ell \lesssim 1300$) Planck Telescope show a preference for the early dark energy (EDE) theory, which was set to alleviate the Hubble tension of the $\Lambda$ cold dark matter ($\Lambda$CDM) model by decreasing the sound horizon $…
Investigating Model Dependencies for Obscured Active Galactic Nuclei: A Case Study of NGC 3982
Ricci, Claudio; Boorman, Peter G.; Kallová, Kristína
X-ray spectroscopy of heavily obscured active galactic nuclei (AGN) offers a unique opportunity to study the circumnuclear environment of accreting supermassive black holes. However, individual models describing the obscurer have unique parameter spaces that give distinct parameter posterior distributions when fit to the same data. To assess the i…