output
20042026
most citedThe Astropy Project: Sustaining and Growing a Community-oriented Open-source Project and the Latest Major Release (v5.0) of the Core Package

5k citations

Showing 2021 · astro-ph.SRShow all

12 papers · 2 filters

astro-ph.SR2021★ 10 cited

Multiple electron acceleration instances during a series of solar microflares observed simultaneously at X-rays and microwaves

Marina Battaglia, Rohit Sharma, Yingjie Luo +3

Even small solar flares can display a surprising level of complexity regarding their morphology and temporal evolution. Many of their properties, such as energy release and electro…

astro-ph.SR2021★ 27 cited

NuSTAR observations of a repeatedly microflaring active region

Kristopher Cooper, Iain G. Hannah, Brian W. Grefenstette +6

We investigate the spatial, temporal, and spectral properties of 10 microflares from AR12721 on 2018 September 9 and 10 observed in X-rays using the Nuclear Spectroscopic Telescope…

astro-ph.SR2021

Imaging from STIX visibility amplitudes

Paolo Massa, Emma Perracchione, Sara Garbarino +5

Aims: To provide the first demonstration of STIX Fourier-transform X-ray imaging using semi-calibrated (amplitude-only) visibility data acquired during the Solar Orbiter's cruise p…

astro-ph.SR2021★ 33 cited

STIX X-ray microflare observations during the Solar Orbiter commissioning phase

Andrea Francesco Battaglia, Jonas Saqri, Paolo Massa +34

The Spectrometer/Telescope for Imaging X-rays (STIX) is the HXR instrument onboard Solar Orbiter designed to observe solar flares over a broad range of flare sizes, between 4-150 k…

astro-ph.SR2021★ 14 cited

Exploring mutual information between IRIS spectral lines. II. Calculating the most probable response in all spectral windows

Brandon Panos, Lucia Kleint

A three-dimensional picture of the solar atmosphere's thermodynamics can be obtained by jointly analyzing multiple spectral lines that span many formation heights. In paper I, we f…

astro-ph.SR2021★ 11 cited

ALMA small-scale features in the quiet Sun and active regions

R. Brajsa, I. Skokic, D. Sudar +5

Aims. The main aim of the present analysis is to decipher (i) the small-scale bright features in solar images of the quiet Sun and active regions obtained with the Atacama Large Mi…

astro-ph.SR2021★ 24 cited

Exploring mutual information between IRIS spectral lines. I. Correlations between spectral lines during solar flares and within the quiet Sun

Brandon Panos, Lucia Kleint, Sviatoslav Voloshynovskiy

Spectral lines allow us to probe the thermodynamics of the solar atmosphere, but the shape of a single spectral line may be similar for different thermodynamic solutions. Multiline…

astro-ph.SR2021★ 14 cited

A comparison of the active region upflow and core properties using simultaneous spectroscopic observations from IRIS and Hinode

Krzysztof Barczynski, Louise Harra, Lucia Kleint +2

The origin of the slow solar wind is still an open issue. It has been suggested that upflows at the edge of active regions (AR) can contribute to the slow solar wind. Here, we comp…

astro-ph.SR2021★ 46 cited

The Alfvénic nature of chromospheric swirls

Andrea Francesco Battaglia, José Roberto Canivete Cuissa, Flavio Calvo +2

We investigate the evolution and origin of small-scale chromospheric swirls by analyzing numerical simulations of the quiet solar atmosphere, using the radiative magnetohydrodynami…

astro-ph.SR2021★ 36 cited

Energetic Electron Distribution of the Coronal Acceleration Region: First results from Joint Microwave and Hard X-ray Imaging Spectroscopy

Bin Chen, Marina Battaglia, Säm Krucker +2

Nonthermal sources located above bright flare arcades, referred to as the "above-the-loop-top" sources, have been often suggested as the primary electron acceleration site in major…

astro-ph.SR2021★ 24 cited

The active region source of a type III radio storm observed by Parker Solar Probe during Encounter 2

L. Harra, D. H. Brooks, S. D. Bale +6

Context. To investigate the source of a type III radio burst storm during encounter 2 of NASA's Parker Solar Probe (PSP) mission. Aims. It was observed that in encounter 2 of NASA'…

astro-ph.SR2021★ 23 cited

Radio Spectral Imaging of an M8.4 Eruptive Solar Flare: Possible Evidence of a Termination Shock

Yingjie Luo, Bin Chen, Sijie Yu +2

Solar flare termination shocks have been suggested as one of the viable mechanisms for accelerating electrons and ions to high energies. Observational evidence of such shocks, howe…