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A Multicomponent Magnetic Proxy for Solar Activity
Warren, Harry P.; Upton, Lisa A.; Floyd, Linton E.
We present a new, multicomponent magnetic proxy for solar activity derived from full disk magnetograms that can be used in the specification and forecasting of the Sun's radiative output. To compute this proxy we project Carrington maps, such as the synchronic Carrington maps computed with the Advective Flux Transport (AFT) surface flux transport …
An Entropy-stable Ideal EC-GLM-MHD Model for the Simulation of the Three-dimensional Ambient Solar Wind
Feng, Xueshang; Wei, Fengsi; Li, Caixia
The main aim of the current work is to apply the Roe+Lax-Friedrichs (LF) hybrid entropy-stable scheme to the simulation of the three-dimensional ambient solar wind. The governing equations for the solar wind flow and magnetic field utilize the entropy-consistent nine-wave magnetic field divergence diminishing ideal magnetohydrodynamics (MHD) equat…
Warm ISM in the Sgr A complex. II. The [C/N] abundance ratio traced by [CII] 158 µm and [NII] 205 µm observations toward the Arched Filaments at the Galactic center
Abel, N.; Stutzki, J.; Simon, R. +2 more
Context. The Arches Cluster - Arched Filaments (AF) system is our Galaxy's prime example of the complexity involved in the interaction between the strong radiation field of numerous OB stars and their surrounding ISM in extremely harsh environments such as the Galactic center (GC) of the Milky Way. It offers a unique opportunity to study the close…
Discovery of a Highly Collimated Flow from the High-mass Protostar ISOSS J23053+5953 SMM2
Zhang, Qizhou; Carrasco-González, Carlos; Linz, Hendrik +6 more
We present Very Large Array C-, X-, and Q-band continuum observations, as well as 1.3 mm continuum and CO(2-1) observations with the Submillimeter Array toward the high-mass protostellar candidate ISOSS J23053+5953 SMM2. Compact centimeter continuum emission was detected near the center of the SMM2 core with a spectral index of 0.24(± 0.15) betwee…
Commissioning and improvements of the instrumentation and launch of the scientific exploitation of OARPAF, the Regional Astronomical Observatory of the Antola Park
Righi, Chiara; Landoni, Marco; Ricci, Davide +18 more
The OARPAF telescope is an 80-cm-diameter optical telescope installed in the Antola Mount Regional Reserve, in Northern Italy. We present the results of the characterization of the site, as well as developments and interventions that have been implemented, with the goal of exploiting the facility for scientific and educational purposes. During the…
Pulkovo observations of apparent close approaches between near-earth asteroids and the Gaia stars in 2019-2020
Bikulova, D. A.
The astrometric observations of the apparent close approaches between near-Earth asteroids and the Gaia stars provide high quality data for studies on the dynamics of these objects. We present the technique of data analysis that allows us to decrease the distortion-dependent positional errors and observational results of eight of such events perfo…
Evidence for fluvial and glacial activities within impact craters that excavated into a Noachian volcanic dome on Mars
Harish; Vijayan, S.; Mangold, N.
Impact craters on Mars preserve diverse records of volcanic, fluvial, and glacial activities. Enigmatically, the preservation of these major activities or records altogether within impact craters is rare. We report one such new observation of impact craters that formed on a volcanic dome studied using data from the Mars Reconnaissance Orbiter's (M…
ALMA View of the ρ Ophiuchi A PDR with a 360 au Beam: The [C I] Emission Originates from the Plane-parallel PDR and Extended Gas
Nakamura, Fumitaka; Shimajiri, Yoshito; Yamagishi, Mitsuyoshi +5 more
We present the results of data analysis of the [C I] (3P1-3P0) emission from the ρ Ophiuchi A photon-dominated region (PDR) obtained in the ALMA ACA standalone mode with a spatial resolution of 2.6 arcsec (360 au). The [C I] emission shows filamentary structures with a width of ∼1000 au, which are adjace…
Neptune's HCl upper limit from Herschel/HIFI
Irwin, P. G. J.; Teanby, N. A.; Gould, B.
Here we search for hydrogen chloride (HCl) in Neptune's stratosphere using observations of the 1876.22 GHz J=3-2 transition from the Heterodyne Instrument for the Far-Infrared (HIFI) on Herschel. Observations comprise a 7.2 hr disc-averaged integration, originally designed to investigate stratospheric methane. Significant HCl emission was not dete…
Do MURaM and STAGGER Simulations of Solar Faculae Match Observational Signatures from Magnetic Structures?
Cubas Armas, Melania; Fabbian, Damian
We compare results of simulations of solar facular-like conditions performed using the numerical codes MURaM and STAGGER. Both simulation sets have a similar setup, including the initial condition of ≈200 G vertical magnetic flux. After interpolating the output physical quantities to constant optical depth, we compare them and test them against in…