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Episodic X-Ray Outflows from the Tidal Disruption Event ASASSN-14li
Steiner, James F.; Tombesi, Francesco; Pasham, Dheeraj R. +4 more
ASASSN-14li is a low-redshift (z = 0.0206) tidal disruption event (TDE) that has been studied extensively across the entire electromagnetic spectrum and has provided one of the most sensitive measurements of a TDE to date. Its X-ray spectrum is soft and thermal (kT ∼ 0.05 keV) and shows a residual broad absorption feature between 0.6 and 0.8 keV, …
The Gaia-ESO survey: New spectroscopic binaries in the Milky Way
Jorissen, A.; Zwitter, T.; Vallenari, A. +14 more
Context. The Gaia-ESO survey (GES) is a large public spectroscopic survey that acquired spectra for more than 100 000 stars across all major components of the Milky Way. In addition to atmospheric parameters and stellar abundances that have been derived in previous papers of this series, the GES spectra allow us to detect spectroscopic binaries wi…
Ammonium hydrosulfide (NH4SH) as a potentially significant sulfur sink in interstellar ices
van Dishoeck, E. F.; Slavicinska, K.; Kavanagh, P. J. +7 more
Context. Sulfur is depleted with respect to its cosmic standard abundance in dense star-forming regions. It has been suggested that this depletion is caused by the freeze-out of sulfur on interstellar dust grains, but the observed abundances and upper limits of sulfur-bearing ices remain too low to account for all of the missing sulfur. Toward the…
Predicting Interstellar Object Chemodynamics with Gaia
Bannister, Michele T.; Lintott, Chris; Hopkins, Matthew J.
The interstellar object (ISO) population of the Milky Way is a product of its stars. However, what is in fact a complex structure in the solar neighborhood has traditionally in ISO studies been described as smoothly distributed. Using a debiased stellar population derived from the Gaia Data Release 3 stellar sample, we predict that the velocity di…
Data-driven Dynamics with Orbital Torus Imaging: A Flexible Model of the Vertical Phase Space of the Galaxy
Hogg, David W.; Price-Whelan, Adrian M.; Horta, Danny +4 more
The vertical kinematics of stars near the Sun can be used to measure the total mass distribution near the Galactic disk and to study out-of-equilibrium dynamics. With contemporary stellar surveys, the tracers of vertical dynamics are so numerous and so well measured that the shapes of underlying orbits are almost directly visible in the data throu…
Hydrogen Column Density Variability in a Sample of Local Compton-thin AGN II
Buchner, J.; Ajello, M.; Marchesi, S. +7 more
We present the multiepoch analysis of 13 variable, nearby (z ≲ 0.1), and Compton-thin (1022 < NH < 1.5 × 1024 cm‑2) active galactic nuclei (AGN) selected from the 105-month BAT catalog. Analyzing all available archival soft and hard X-ray observations, we investigate the line-of-sight hydrogen colu…
Rapid mid-infrared spectral timing with JWST: GRS 1915+105 during an MIR-bright and X-ray-obscured state
Maccarone, T. J.; Altamirano, D.; Knigge, C. +45 more
We present mid-infrared (MIR) spectral-timing measurements of the prototypical Galactic microquasar GRS 1915+105. The source was observed with the Mid-Infrared Instrument (MIRI) onboard JWST in June 2023 at an MIR luminosity
Connection between planetary He I λ10 830 Å absorption and extreme-ultraviolet emission of planet-host stars
Sánchez-López, A.; López-Puertas, M.; Amado, P. J. +13 more
Context. The detection of the He I λ10 830 Å triplet in exoplanet atmospheres has opened a new window for probing planetary properties, including atmospheric escape. Unlike Lyman α, the triplet is significantly less affected by interstellar medium (ISM) absorption. Sufficient X-ray and extreme ultraviolet (XUV) stellar irradiation may trigger the …
Precise and Accurate Mass and Radius Measurements of Fifteen Galactic Red Giants in Detached Eclipsing Binaries
Lu, Jessica R.; Fulton, Benjamin J.; Kochanek, Christopher S. +9 more
Precise and accurate mass and radius measurements of evolved stars are crucial to calibrating stellar models. Stars in detached eclipsing binaries (EBs) are excellent potential calibrators because their stellar parameters can be measured with fractional uncertainties of a few percent, independent of stellar models. The All-Sky Automated Survey for…
The NuSTAR Local AGN N H Distribution Survey (NuLANDS). I. Toward a Truly Representative Column Density Distribution in the Local Universe
Brandt, William N.; Gandhi, Poshak; Ueda, Yoshihiro +33 more
Hard X-ray-selected samples of active galactic nuclei (AGN) provide one of the cleanest views of supermassive black hole accretion but are biased against objects obscured by Compton-thick gas column densities of N H > 1024 cm‑2. To tackle this issue, we present the NuSTAR Local AGN N H Distribution Su…