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Black Hole Mass Measurements of Early-type Galaxies NGC 1380 and NGC 6861 through ALMA and HST Observations and Gas-dynamical Modeling
Ho, Luis C.; Barth, Aaron J.; Buote, David A. +6 more
We present Atacama Large Millimeter/submillimeter Array (ALMA) Cycle 2 observations of CO(2-1) emission from the circumnuclear disks in two early-type galaxies, NGC 1380 and NGC 6861. The disk in each galaxy is highly inclined (i ~ 75°), and the projected velocities of the molecular gas near the galaxy centers are ~300 km s-1 in NGC 138…
Possible Systematic Rotation in the Mature Stellar Population of a z = 9.1 Galaxy
Inoue, Akio K.; Hashimoto, Takuya; Sugahara, Yuma +13 more
We present new observations with the Atacama Large Millimeter/submillimeter Array for a gravitationally lensed galaxy at z = 9.1, MACS1149-JD1. [O III] 88 µm emission is detected at 10σ with a spatial resolution of ~0.3 kpc in the source plane, enabling the most distant morphokinematic study of a galaxy. The [O III] emission is distributed s…
The First Insight-HXMT Gamma-Ray Burst Catalog: The First Four Years
Li, Gang; Ge, Ming-Yu; Ma, Xiang +40 more
The Hard X-ray Modulation Telescope (Insight-HXMT) is China's first X-ray astronomy satellite. It was launched on 2017 June 15. The anticoincidence CsI detectors of the High Energy X-ray telescope (HE) on board Insight-HXMT could serve as an all-sky gamma-ray monitor in about 0.2-3 MeV. In its first four years of operation, Insight-HXMT has detect…
Electron dynamics in small magnetospheres. Insights from global, fully kinetic plasma simulations of the planet Mercury
Henri, Pierre; André, Nicolas; Aizawa, Sae +4 more
Context. The planet Mercury possesses a small but highly dynamic magnetosphere in which the role and dynamics of electrons are still largely unknown.
Aims: We aim to model the global dynamics of solar-wind electrons impinging on Mercury's magnetosphere. Particular relevance is given to local acceleration processes and the global circulation p…
Modeling of Joint Parker Solar Probe-Metis/Solar Orbiter Observations
Zank, G. P.; Zhao, L. -L.; Telloni, D. +1 more
We present the first theoretical modeling of joint Parker Solar Probe (PSP)-Metis/Solar Orbiter (SolO) quadrature observations. The combined observations describe the evolution of a slow solar wind plasma parcel from the extended solar corona (3.5-6.3 R ⊙) to the very inner heliosphere (23.2 R ⊙). The Metis/SolO instrument re…
Phase-resolved X-ray spectroscopy of PSR B0656+14 with SRG/eROSITA and XMM-Newton
Maitra, Chandreyee; Haberl, Frank; Potekhin, Alexander Y. +13 more
We present a detailed spectroscopic and timing analysis of X-ray observations of the bright pulsar PSR B0656+14. The observations were obtained simultaneously with eROSITA and XMM-Newton during the calibration and performance verification phase of the Spektrum-Roentgen-Gamma mission (SRG). The analysis of the 100 ks deep observation of eROSITA is …
Water, hydrogen cyanide, carbon monoxide, and dust production from distant comet 29P/Schwassmann-Wachmann 1
Küppers, M.; Hartogh, P.; Lellouch, E. +13 more
Context. 29P/Schwassmann-Wachmann 1 is a distant Centaur/comet, showing persistent CO-driven activity and frequent outbursts.
Aims: We aim to better characterize its gas and dust activity from multiwavelength observations performed during outbursting and quiescent states.
Methods: We used the HIFI, PACS and SPIRE instruments of the Hersc…
In-orbit Timing Calibration of the Insight-Hard X-Ray Modulation Telescope
Zhang, Shu; Li, Xiaobo; Zhang, Shuang-Nan +24 more
We describe the timing system and the timing calibration results of the three payloads on board the Insight-Hard X-ray Modulation Telescope (Insight-HXMT). These three payloads are the High Energy X-ray telescope (HE; 20-250 keV), the Medium Energy X-ray telescope (ME; 5-30 keV), and the Low Energy X-ray telescope (LE; 1-10 keV). We present a meth…
Radio Detection of an Elusive Millisecond Pulsar in the Globular Cluster NGC 6397
Fu, Xiaoting; Tsai, Chao-Wei; Freire, Paulo C. C. +32 more
We report the discovery of a new 5.78 ms period millisecond pulsar (MSP), PSR J1740-5340B (NGC 6397B), in an eclipsing binary system discovered with the Parkes radio telescope (now also known as Murriyang) in Australia and confirmed with the MeerKAT radio telescope in South Africa. The measured orbital period, 1.97 days, is the longest among all e…
The VMC survey - XLVI. Stellar proper motions in the centre of the Large Magellanic Cloud
de Grijs, Richard; Ripepi, Vincenzo; Cioni, Maria-Rosa L. +7 more
We present proper motion (PM) measurements within the central region of the Large Magellanic Cloud (LMC), using near-infrared data from the VISTA survey of the Magellanic Cloud system (VMC). This work encompasses 18 VMC tiles covering a total sky area of ~28 deg2. We computed absolute stellar PMs from multiepoch observations in the K