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Solar spicules have eluded modelers and observers for decades. Since the discovery of the more energetic type II, spicules have become a heated topic but their contribution to the energy balance of the low solar atmosphere remains unknown.…

Spicules are ubiquitous, fast moving jets observed off-limb in chromospheric spectral lines. Combining the recently-launched Interface Region Imaging Spectrograph with the Solar Dynamics Observatory and Hinode, we have a unique opportunity…

太阳与恒星天体物理 · 物理学 2015-05-12 H. Skogsrud , L. Rouppe van der Voort , B. De Pontieu , T. M. D. Pereira

We present the study of the X2-class flare which occurred on the 27 October 2014 and was observed with the Interface Region Imaging Spectrograph (IRIS) and the EUV Imaging Spectrometer (EIS) on board the Hinode satellite. Thanks to the high…

太阳与恒星天体物理 · 物理学 2016-01-27 V. Polito , J. W. Reep , K. K. Reeves , P. J. A. Simões , J. Dudík , G. Del Zanna , H. E. Mason , L. Golub

We performed a 3D radiative MHD simulation of the solar atmosphere. This simulation shows a jet-like feature that shows similarities to the type II spicules observed for the first time with Hinode. Rapid Blueshifted Events (RBEs) on the…

We use coordinated observations with the Interface Region Imaging Spectrograph (IRIS) and the Swedish 1-m Solar Telescope (SST) to identify the disk counterpart of type II spicules in upper-chromospheric and transition region (TR)…

太阳与恒星天体物理 · 物理学 2015-03-04 L. Rouppe van der Voort , B. De Pontieu , T. M. D. Pereira , M. Carlsson , V. Hansteen

Spicules are the most ubuiquitous type of jets in the solar atmosphere. The advent of high-resolution imaging and spectroscopy from the Interface Region Imaging Spectrograph (IRIS) and ground-based observatories has revealed the presence of…

太阳与恒星天体物理 · 物理学 2017-11-01 Bart De Pontieu , Juan Martinez-Sykora , Georgios Chintzoglou

We present here an extensive analysis of the protostellar jet driven by IRAS 20126+4104, deriving the kinematical, dynamical, and physical conditions of the H2 gas along the flow. The jet has been investigated by means of near-IR H2 and…

天体物理学 · 物理学 2015-05-13 A. Caratti o Garatti , D. Froebrich , J. Eisloeffel , T. Giannini , B. Nisini

The Very high Angular resolution ULtraviolet Telescope (VAULT) is a sounding rocket payload built to study the crucial interface between the solar chromosphere and the corona by observing the strongest line in the solar spectrum, the Ly-a…

太阳与恒星天体物理 · 物理学 2015-05-14 A. Vourlidas , B. Sánchez-Andrade Nuño , E. Landi , S. Patsourakos , L. Teriaca , U. Schühle , C. M. Korendyke , I. Nestoras

We have analyzed IRIS spectral and slit-jaw observations of a quiet region near the South Pole. In this article we present an overview of the observations, the corrections, and the absolute calibration of the intensity. We focus on the…

太阳与恒星天体物理 · 物理学 2018-01-09 C. E. Alissandrakis , J. -C. Vial , A. Koukras , E. Buchlin , M. Chane-Yook

Recently a second type of spicules was discovered at the solar limb with the Solar Optical Telescope (SOT) onboard the Japanese Hinode spacecraft. These previously unrecognized type II spicules are thin chromospheric jets that are…

太阳与恒星天体物理 · 物理学 2014-11-20 L. Rouppe van der Voort , J. Leenaarts , B. de Pontieu , M. Carlsson , G. Vissers

We have developed an algorithm to identify solar spicules in the first ever systematic survey of on-disk spicules exclusively using Mg II spectral observations. Using this algorithm we identify 2021 events in three Interface Region Imaging…

太阳与恒星天体物理 · 物理学 2023-04-11 Vicki L. Herde , Phillip C. Chamberlin , Don Schmit , Souvik Bose , Adrian Daw , Ryan O. Milligan , Vanessa Polito

Recently, De Pontieu et al. (2007b) discovered a class of spicules that evolves more rapidly than previously known spicules, with rapid apparent motions of 50--150 km s${}^{-1}$, thickness of a few 100 km, and lifetimes of order 10--60…

天体物理学 · 物理学 2009-11-13 Ø. Langangen , B. De Pontieu , M. Carlsson , V. H. Hansteen , G. Cauzzi , K. Reardon

High-resolution observations of dynamic phenomena give insight into properties and processes that govern the low solar atmosphere. We present the analysis of jet-like phenomena emanating from a penumbral foot-point in active region (AR)…

太阳与恒星天体物理 · 物理学 2020-10-09 Llŷr Dafydd Humphries , Erwin Verwichte , David Kuridze , Huw Morgan

We investigate the role of active region spicules in the mass balance of the solar wind and energy supply for heating the solar atmosphere. We use high cadence observations from the Solar Optical Telescope (SOT) onboard the Hinode satellite…

太阳与恒星天体物理 · 物理学 2016-03-23 S. Zeighami , A. R. Ahangarzadeh Maralani , E. Tavabi , A. Ajabshirizadeh

The Strontium Iodide Radiation Instrument (SIRI) is a single detector, gamma-ray spectrometer designed to space-qualify the new scintillation detector material europium-doped strontium iodide (SrI2:Eu) and new silicon photomultiplier (SiPM)…

天体物理仪器与方法 · 物理学 2019-07-29 Lee J. Mitchell , Bernard F. Phlips , J. Eric Grove , Theodore Finne , Mary Johnson-Rambert , W. Neil Johnson

Wave theories of heating the chromosphere, corona, and solar wind due to photospheric fluctuations are strengthened by the existence of observed wave coherency up to the transition region (TR). The coherency of solar spicules' intensity…

太阳与恒星天体物理 · 物理学 2017-02-08 Alireza Ahangarzadeh Maralani , Ehsan Tavabi , Ali Ajabshirizadeh

Ground-based near-IR observations have revealed that Uranus anomalously hot upper atmosphere, detected by Voyager 2, has been steadily cooling. The observed $H_3^+$ and $H_2$ emission-line spectra probe Uranus' ionosphere and thermosphere,…

地球与行星天体物理 · 物理学 2025-01-22 Laurence Trafton , Kyle Kaplan

The Interface Region Imaging Spectrograph (IRIS) small explorer spacecraft provides simultaneous spectra and images of the photosphere, chromosphere, transition region, and corona with 0.33-0.4 arcsec spatial resolution, 2 s temporal…

Recent high-cadence flare campaigns by the Interface Region Imaging Spectrograph (IRIS) have offered new opportunities to study rapid processes characteristic of flare energy release, transport, and deposition. Here, we examine high-cadence…

太阳与恒星天体物理 · 物理学 2025-04-16 Juraj Lörinčík , Vanessa Polito , Graham S. Kerr , Laura A. Hayes , Alexander J. B. Russell

Chromospheric observations taken at high cadence and high spatial resolution show a range of spicule like features, including Type I, Type II (as well as RBEs and RREs) and those which seem to appear within a few seconds, which if…

太阳与恒星天体物理 · 物理学 2016-04-20 J. Shetye , J. G. Doyle , E. Scullion , C. J. Nelson , D. Kuridze , V. Henriques , F. Woeger , T. Ray
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