Matches in SemOpenAlex for { <https://semopenalex.org/work/W4313484328> ?p ?o ?g. }
Showing items 1 to 63 of
63
with 100 items per page.
- W4313484328 abstract "Sunspot light bridges (LBs) exhibit a wide range of short-lived phenomena in the chromosphere and transition region. In contrast, we use here data from the Multi-Application Solar Telescope (MAST), the Interface Region Imaging Spectrograph (IRIS), Hinode, the Atmospheric Imaging Assembly (AIA), and the Helioseismic and Magnetic Imager (HMI) to analyze the sustained heating over days in an LB in a regular sunspot. Chromospheric temperatures were retrieved from the the MAST Ca II and IRIS Mg II lines by nonlocal thermodynamic equilibrium inversions. Line widths, Doppler shifts, and intensities were derived from the IRIS lines using Gaussian fits. Coronal temperatures were estimated through the differential emission measure, while the coronal magnetic field was obtained from an extrapolation of the HMI vector field. At the photosphere, the LB exhibits a granular morphology with field strengths of about 400 G and no significant electric currents. The sunspot does not fragment, and the LB remains stable for several days. The chromospheric temperature, IRIS line intensities and widths, and AIA 171 AA and 211 AA intensities are all enhanced in the LB with temperatures from 8000 K to 2.5 MK. Photospheric plasma motions remain small, while the chromosphere and transition region indicate predominantly red-shifts of 5-20 km/s with occasional supersonic downflows exceeding 100 km/s. The excess thermal energy over the LB is about 3.2x10^26 erg and matches the radiative losses. It could be supplied by magnetic flux loss of the sunspot (7.5x10^27 erg), kinetic energy from the increase in the LB width (4x10^28 erg), or freefall of mass along the coronal loops (6.3x10^26 ,erg)." @default.
- W4313484328 created "2023-01-06" @default.
- W4313484328 creator A5008811301 @default.
- W4313484328 creator A5014301824 @default.
- W4313484328 creator A5029067411 @default.
- W4313484328 creator A5038769658 @default.
- W4313484328 creator A5077904036 @default.
- W4313484328 date "2023-01-02" @default.
- W4313484328 modified "2023-09-30" @default.
- W4313484328 title "Sustained heating of the chromosphere and transition region over a sunspot light bridge" @default.
- W4313484328 doi "https://doi.org/10.48550/arxiv.2301.00608" @default.
- W4313484328 hasPublicationYear "2023" @default.
- W4313484328 type Work @default.
- W4313484328 citedByCount "0" @default.
- W4313484328 crossrefType "posted-content" @default.
- W4313484328 hasAuthorship W4313484328A5008811301 @default.
- W4313484328 hasAuthorship W4313484328A5014301824 @default.
- W4313484328 hasAuthorship W4313484328A5029067411 @default.
- W4313484328 hasAuthorship W4313484328A5038769658 @default.
- W4313484328 hasAuthorship W4313484328A5077904036 @default.
- W4313484328 hasBestOaLocation W43134843281 @default.
- W4313484328 hasConcept C106933524 @default.
- W4313484328 hasConcept C108884401 @default.
- W4313484328 hasConcept C115260700 @default.
- W4313484328 hasConcept C120665830 @default.
- W4313484328 hasConcept C121332964 @default.
- W4313484328 hasConcept C1276947 @default.
- W4313484328 hasConcept C197370839 @default.
- W4313484328 hasConcept C2780684822 @default.
- W4313484328 hasConcept C2780848835 @default.
- W4313484328 hasConcept C44870925 @default.
- W4313484328 hasConcept C4839761 @default.
- W4313484328 hasConcept C62520636 @default.
- W4313484328 hasConcept C74902906 @default.
- W4313484328 hasConceptScore W4313484328C106933524 @default.
- W4313484328 hasConceptScore W4313484328C108884401 @default.
- W4313484328 hasConceptScore W4313484328C115260700 @default.
- W4313484328 hasConceptScore W4313484328C120665830 @default.
- W4313484328 hasConceptScore W4313484328C121332964 @default.
- W4313484328 hasConceptScore W4313484328C1276947 @default.
- W4313484328 hasConceptScore W4313484328C197370839 @default.
- W4313484328 hasConceptScore W4313484328C2780684822 @default.
- W4313484328 hasConceptScore W4313484328C2780848835 @default.
- W4313484328 hasConceptScore W4313484328C44870925 @default.
- W4313484328 hasConceptScore W4313484328C4839761 @default.
- W4313484328 hasConceptScore W4313484328C62520636 @default.
- W4313484328 hasConceptScore W4313484328C74902906 @default.
- W4313484328 hasLocation W43134843281 @default.
- W4313484328 hasOpenAccess W4313484328 @default.
- W4313484328 hasPrimaryLocation W43134843281 @default.
- W4313484328 hasRelatedWork W1971252610 @default.
- W4313484328 hasRelatedWork W1986221193 @default.
- W4313484328 hasRelatedWork W2059467707 @default.
- W4313484328 hasRelatedWork W2135545495 @default.
- W4313484328 hasRelatedWork W2963221160 @default.
- W4313484328 hasRelatedWork W3099864254 @default.
- W4313484328 hasRelatedWork W3101833890 @default.
- W4313484328 hasRelatedWork W4234840284 @default.
- W4313484328 hasRelatedWork W4280497755 @default.
- W4313484328 hasRelatedWork W4298166177 @default.
- W4313484328 isParatext "false" @default.
- W4313484328 isRetracted "false" @default.
- W4313484328 workType "article" @default.