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Statistical Mapping of Magnetic Topology at Venus
Persson, Moa; Xu, Shaosui; Frahm, Rudy A. +3 more
Despite Venus having insignificant intrinsic magnetic fields, the magnetic connectivity between the solar wind and the Venus ionosphere, or magnetic topology, is not as simple as expected and is also important for characterizing the Venus space environment. This study provides a technique combining superthermal electron energy and pitch angle dist…
A high-latitude coronal mass ejection observed by a constellation of coronagraphs: Solar Orbiter/Metis, STEREO-A/COR2, and SOHO/LASCO
Perri, S.; Sasso, C.; Romoli, M. +35 more
Context. A few days before the first perihelion of the Solar Orbiter nominal mission, which occurred on 2022 March 26, the Metis coronagraph on board Solar Orbiter detected a coronal mass ejection (CME) that was moving away from the far side of the Sun (with respect to Solar Orbiter) at high northern latitudes. The eruption was also seen by other …
Probing Reflection from Aerosols with the Near-infrared Dayside Spectrum of WASP-80b
Fortney, Jonathan J.; Stevenson, Kevin B.; Désert, Jean-Michel +9 more
The presence of aerosols is intimately linked to the global energy budget and the composition of a planet's atmosphere. Their ability to reflect incoming light prevents energy from being deposited into the atmosphere, and they shape the spectra of exoplanets. We observed five near-infrared secondary eclipses of WASP-80b with the Wide Field Camera …
Investigation of the connection between X-ray binaries and compact star clusters in NGC 628
Akyuz, A.; Aksaker, N.; Avdan, S. +3 more
We investigated for a possible connection between the types of X-ray binaries (XRBs) and the properties of compact star clusters in the nearby galaxy NGC 628. Using Chandra archival data covering the years 2001-2018, 75 X-ray sources were detected within the field of view of observations. A total of 69 XRBs, one of which is an ultraluminous X-ray …
JWST Reveals Widespread CO Ice and Gas Absorption in the Galactic Center Cloud G0.253+0.016
Lu, Xing; Henshaw, Jonathan D.; Ginsburg, Adam +7 more
We report JWST NIRCam observations of G0.253+0.016, the molecular cloud in the Central Molecular Zone known as "The Brick," with the F182M, F187N, F212N, F410M, F405N, and F466N filters. We catalog 56,146 stars detected in all six filters using the crowdsource package. Stars within and behind The Brick exhibit prodigious absorption in the F466N fi…
The IR Compactness of Dusty Galaxies Sets Star Formation and Dust Properties at z ∼ 0-2
Kirkpatrick, Allison; Inami, Hanae; McKinney, Jed +9 more
The surface densities of gas, dust, and stars provide a window into the physics of star formation that, until the advent of high-resolution far-IR/submillimeter observations, has been historically difficult to assess among dusty galaxies. To study the link between IR surface densities and dust properties, we leverage the Atacama Large Millimetre/S…
Discovery of a radio jet in the Cloverleaf quasar at z = 2.56
Tsai, Chao-Wei; Wang, Junzhi; Zhang, Zhi-Yu +10 more
The fast growth of supermassive black holes and their feedback to the host galaxies play an important role in regulating the evolution of galaxies, especially in the early Universe. However, due to cosmological dimming and the limited angular resolution of most observations, it is difficult to resolve the feedback from the active galactic nuclei (…
C I and CO in nearby spiral galaxies. I. Line ratio and abundance variations at ∼200 pc scales
Kruijssen, J. M. Diederik; Rosolowsky, Erik; Chevance, Mélanie +25 more
We present new neutral atomic carbon [C I] (3P1 → 3P0) mapping observations within the inner ∼7 kpc and ∼4 kpc of the disks of NGC 3627 and NGC 4321 at a spatial resolution of 190 pc and 270 pc, respectively, using the Atacama Large Millimeter/Submillimeter Array (ALMA) Atacama Compact Array (ACA). We co…
A Catalog of Quasar Candidates Identified by Astrometric and Mid-infrared Methods in Gaia EDR3
Liao, Shilong; Qi, Zhaoxiang; Tang, Zhenghong +3 more
Quasars are very important in materializing the reference frame. The excess emission of active galactic nuclei (AGNs) in the mid-infrared band can be used to identify quasar candidates. As extremely distant and point-like objects, quasars also could be further selected by an astrometry method. Increasing the number of reliable quasar candidates is…
Chemical abundances of the young inner-disc open cluster NGC 6705 observed by APOGEE: sodium-rich and not α-enhanced
Holtzman, J. A.; Allende Prieto, C.; Bizyaev, D. +19 more
Previous results in the literature have found the young inner-disc open cluster NGC 6705 to be mildly α-enhanced. We examined this possibility via an independent chemical abundance analysis for 11 red-giant members of NGC 6705. The analysis is based on near-infrared APOGEE spectra and relies on LTE calculations using spherical model atmospheres an…