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Spectral and Imaging Observations of a C2.3 White-Light Flare from the Advanced Space-Based Solar Observatory (ASO-S) and the Chinese HαSolar Explorer (CHASE)
Lei, Shijun; Chen, Wei; Feng, Li +27 more
Solar white-light flares are characterized by an enhancement in the optical continuum, which are usually large flares (X- and M-class flares). Here, we report a small C2.3 white-light flare (SOL2022-12-20T04:10) observed by the Advanced Space-based Solar Observatory and the Chinese HαSolar Explorer (CHASE). This flare exhibits an increase of ≈ 6.4…
Identifying New High-confidence Polluted White Dwarf Candidates Using Gaia XP Spectra and Self-organizing Maps
Villaver, Eva; Pérez-Couto, Xabier; Pallas-Quintela, Lara +2 more
The identification of new white dwarfs (WDs) polluted with heavy elements is important since they provide a valuable tool for inferring the chemical properties of putative planetary systems accreting material on their surfaces. The Gaia space mission has provided us with an unprecedented amount of astrometric, photometric, and low-resolution (XP) …
Finding dusty AGNs from the JWST CEERS survey with mid-infrared photometry
Kilerci, Ece; Hashimoto, Tetsuya; Goto, Tomotsugu +8 more
The nature of the interaction between active galactic nuclei (AGNs) and their host galaxies remains an unsolved question. Therefore, conducting an AGN census is valuable for AGN research. Nevertheless, a significant fraction of AGNs are obscured by their environment, which blocks UV and optical emissions due to the dusty torus surrounding the cent…
Source of the Observed Enhancements in Thermospheric ΣO/N2 During Two Solar Eclipses in 2023
Zhang, Y.; Cantrall, C. E.; Mrak, S. +4 more
Two solar eclipse events in 2023 appeared to produce considerable enhancements in the thermospheric column density ratio of monatomic oxygen to molecular nitrogen (ΣO/N2) as measured by TIMED GUVI. We quantify potential sources for eclipse-induced ΣO/N2 changes and find that the observed enhancements arise from the ionospheri…
The X-Ray Emission Reveals the Coronal Activities of Semi-detached Binaries
Liu, Junhui; Wu, Jianfeng
X-ray emission is an important tracer of stellar magnetic activity. We carried out a systematic correlation analysis for the X-ray luminosity
The MODEST catalog of depth-dependent spatially coupled inversions of sunspots observed by Hinode/SOT-SP
Solanki, S. K.; Korpi-Lagg, A.; Castellanos Durán, J. S. +3 more
We present a catalog that contains depth-dependent information about the atmospheric conditions inside sunspot groups of all types. The catalog, which we named MODEST, is currently composed of 944 observations of 117 individual active regions with sunspots and covers all types of features observed in the solar photosphere. We used the SPINOR-2D co…
Spectra and Anisotropy of Solar Energetic Protons During GLE #65 on 28 October, 2003 and GLE #66 on 29 October, 2003
Mishev, Alexander L.; Koldobskiy, Sergey A.; Larsen, Nicholas +1 more
Solar Cycle 23 was the most active in ground-level enhancements (GLEs) with 16 events registered by the global neutron monitor network. In this paper, we study a very active period in October–November, 2003, which revealed an intense solar activity burst that led to several eruptive processes and produced a sequence of three GLEs. By applying stat…
Energy estimation of small-scale jets from the quiet-Sun region
Li, Dong; Ning, Zongjun; Shi, Fanpeng +3 more
Context. Solar jets play a role in coronal heating and the supply of solar wind.
Aims: In this study, we calculate the energies of 23 small-scale jets emerging from a quiet-Sun region in order to investigate their contributions to coronal heating.
Methods: We used data from the High-Resolution Imager (HRI) of the Extreme Ultraviolet Imag…
Mildly explosive eruptions at Martian low-shield volcanoes
Pieterek, Bartosz; Jones, Thomas J.
Ongoing acquisition of Martian surface imagery constantly provides new opportunities to reveal previously undiscovered small-scale volcanic landforms, yielding critical insights into volcanic processes, and challenging existing inferences. Here, using the most recent, high-resolution topographical data, we mapped the accumulation of pyroclastic de…
Fine structure of the age-chromospheric activity relation in solar-type stars: II. Hα line
Ribas, I.; Porto de Mello, G. F.; Almeida-Fernandes, F. +4 more
Excess chromospheric emissions within deep photospheric lines are effective proxies of stellar magnetism for FGK stars. This emission decays with stellar age and is a potential determinant of this important stellar quantity. We report absolutely calibrated H $\alpha$ chromospheric fluxes for 511 solar-type stars in a wide interval of precisely det…