Abstract We analyze high-resolution observations of an X-1.0 white-light flare, triggered by a filament eruption, on 2022 October 2. The full process formation and subsequent eruption was captured in the H α passband Visible Imaging Spectrograph (VIS) board Goode Solar Telescope (GST) within its center field view. White-light emissions appear flare ribbons following ribbon brightening. GST Broadband Filter Imager data show that continuum intensity, as compared to nearby quiet-Sun area, has...

Abstract In this paper, we report our second-part result for the M1.8 class flare on 2012 July 5, with an emphasis initiation process flare-associated filament eruption. The data set consists of high-resolution narrowband images in He i 10830 Å and broadband TiO 7057 taken at Big Bear Solar Observatory 1.6 m aperture Goode Telescope. EUV different passbands observed by Atmospheric Imaging Assembly board Dynamics are used to distinguish hot plasma from cool structures during process....

Abstract The New Vacuum Solar Telescope (NVST) has been releasing its novel winged H α data (WHD) since 2021 April, namely the imaging spectroscopic data. Compared with prior released version, new are further co-aligned among off-band images and packaged into a standard solar physics community format. In this study, we illustrate alignment algorithm used by WHD, which is mainly based on optical flow method to obtain translation offset between images. To quantitatively evaluate results of two...

Abstract In this study we report detailed observations of magnetic environment at four footpoints two warm coronal loops observed on 2016 May 5 in NOAA AR 12542 (Loop I) and 2015 December 17 12470 II). These were connecting a plage region with sunspot periphery umbra We used Solar Dynamics Observatory ( SDO ) Goode Telescope (GST) data to describe the phenomenon understand its causes. The indicates loop brightening episodes associated flux emergence cancellation processes ’s Helioseismic...

Abstract Observations with the Goode Solar Telescope (GST) are presented here showing that emergence of 1.91 × 10 18 Mx new magnetic flux occurred at edge a filamentary light bridge (LB). This was accompanied by brightness enhancement photospheric overturning convection cell (OCC) endpoints emerging structure. We present an analysis origin and dynamics this event using high-resolution GST Fe i 1564.85 nm vector field data, TiO photospheric, H α chromospheric images. The emerged structure 1.5...

We analyze ground-based chromospheric data acquired at a high temporal cadence of 2 s in wings the H$\alpha$ spectral line using Goode Solar Telescope (GST) operating Big Bear Observatory. inspected 30 minute long H$\alpha$-0.08~nm set to find that rapid blue-shifted excursions (RBEs), which are cool component type II spicules, experience very morphological changes on time scales order 1 second. Unlike typical reconnection jets, RBEs frequently appear \textit{in situ} without any clear...

Context. The carbon monoxide (CO) molecular line at around 46655 A in solar infrared spectra is often used to investigate the dynamic behavior of cold heart atmosphere, i.e., sunspot oscillation, especially umbra. Aims. We investigated oscillation Doppler velocities CO 7-6 R67 and 3-2 R14 lines that were measured by Cryogenic Infrared Spectrograph (CYRA), as well profile Mg II k was detected Interface Region Imaging (IRIS). Methods. single Gaussian function applied each extract shift, while...

Abstract Recent studies suggest that the magnetic switchbacks (SBs) detected by Parker Solar Probe carry information on scales of solar supergranulation (large scale) and granulation (medium scale). We test this claim using high-resolution H α images obtained with visible spectropolarimeters Goode Telescope in Big Bear Observatory. As possible sources, we count all spicule-like features standing along chromospheric networks near coronal hole boundary blue-wing but absent red-wing measure...

Abstract Multiple solar instrument observation campaigns are increasingly popular among the physics and space science communities. Scientists organize high-resolution ground-based telescopes spacecraft to study evolution of complex atmosphere origin weather. Image registration coalignment between different instruments vital for accurate data product comparison. We developed a Python language package imaging acquired by Goode Solar Telescope (GST) space-based full-disk continuum intensity...

Abstract Plumes are bright structures in coronal holes extending from the solar surface into corona and considered as a possible source of wind. thought to be rooted strong unipolar photospheric flux patches (network/plage region). The magnetic activities at base plumes may play crucial role producing outflows propagating disturbances (PDs). However, photospheric/chromospheric (e.g., jets/spicules) their connection PDs is poorly understood. Using high-resolution observations plume taken on...

It is reported that ultra-fine dynamic ejections along magnetic loops of an active region originate from intergranular lanes and they are associated with subsequent heating in the corona. As continuing work, we analyze same set data but focus on a quiet overlying EUV/UV emission as observed by Atmospheric Imaging Assembly (AIA) board Solar Dynamics Observatory (SDO). We find there appear to be dark patches scattered across always stay lanes. Over patches, average UV/EUV at 131, 171, 304 1600...

We investigate the self-Kerr nonlinearity of a four-level N-type atomic system in 87 Rb and observe its reversible property with unidirectional increase switching field.For laser arrangement that probe field interacts middle two states, slope sign around resonance can not only be changed from negative to positive, but also again increasing field.Numerical simulation agrees very well experimental results dressed state analysis is presented explain results.

Abstract This study presents a C3.0 flare observed by the Big Bear Solar Observatory/Goode Telescope (GST) and Interface Region Imaging Spectrograph (IRIS) on 2018 May 28 around 17:10 UT. The Near-Infrared Spectropolarimeter of GST was set to spectral imaging mode scan five positions at ±0.8, ±0.4 Å line center He i 10830 Å. At ribbon’s leading edge, is undergo enhanced absorption, while rest ribbon be in emission. When emission, contrast compared preflare ranges from about 30% nearly 100%...

Using multi-wavelength observations, we analysed magnetic field variations associated with a gradual X1.2 flare that erupted on January 7, 2014 in active region (AR) NOAA 11944 located near the disk center. A fast coronal mass ejection (CME) was observed following flare, which noticeably deflected south-west direction. chromospheric filament at eruption site prior to and after flare. We used SDO/HMI data perform non-linear force-free extrapolation of fields above AR study evolution eruption....

The method of solar magnetic field calibration for the filter-based magnetograph is normally linear under weak-field approximation that cannot generate strong region well due to saturation effect. We try provide a new carry out nonlinear with help neural networks obtain more accurate fields. employed data from Hinode/SP construct training, validation and test dataset. narrow-band Stokes I, Q, U, V maps at one wavelength point were selected all 112 points observed by SP so as simulate...

Abstract We report on high-resolution observations of recurrent fan-like jets by the Goode Solar Telescope in multiple wavelengths inside a sunspot group. The dynamics behavior is derived from H α line profiles. Quantitative values for one well-identified event have been obtained, showing maximum projected velocity 42 km s −1 and Doppler shift order 20 . footpoints/roots lifted center profile compared to quiet Sun, suggesting long-lasting heating at these locations. magnetic field between...

New Jersey Institute of Technology (NJIT) has built, and now operates the 1.6-meter Goode Solar Telescope (GST) at Big Bear Observatory (BBSO), which was highest-resolution solar telescope built in U.S. a generation. GST observations have been put campaign mode to support NASA Parker Probe (PSP) mission during its perihelia 2019, 2020, 2021 2022, by providing unique high-resolution critically complementary information on photosphere chromosphere source regions wind acceleration heating...

Abstract We used 29 high-resolution line-of-sight magnetograms acquired with the Goode Solar Telescope (GST) in a quiet-Sun area to extrapolate series of potential field configurations and study their time variations. The showed that there are regions consistently exhibit changes loop connectivity, whereas other vast areas do not show such changes. Analysis topological features fields indicates photospheric footprint separatrix between open- closed-loop systems closely matches roots rapid...

Abstract With the aid of high-resolution spatial and temporal observations from Goode Solar Telescope, we present an investigation emergence, coalescence, submergence a moving magnetic feature (MMF) in region surrounding pore located at periphery large sunspot. The results show that MMF has field strength greater than 500 G is dominated by horizontal component. We observe upflow inner part downflow outer part, indicating pattern Evershed flow. emergence accompanied expansion granule, which...

Abstract We carried out high-resolution spectroscopic imaging in He i 10830 Å and H α for a set of active region (NOAA 12569) magnetic loops different sizes (classified into short long loops) with the Goode Solar Telescope at Big Bear Observatory on 2016 July 18. The take form an chromospheric arch filament system, yet their extreme ultraviolet (EUV) counterparts are observed by Atmospheric Imaging Assembly board Dynamics . Animations blue- red-wing images give counter-streaming motions;...

CYRA (CrYogenic solar spectrogRAph) is a facility instrument of the 1.6-meter Goode Solar Telescope (GST) at Big Bear Observatory (BBSO). focuses on study near-infrared spectrum between 1 and 5 microns, an under-explored region which not only fertile ground for photospheric magnetic diagnostics but also allows unique window into chromosphere lying atop photosphere. first-ever fully cryogenic spectrograph in any observatory with its two predecessors, McMath-Pierce Mees Telescopes, being based...

CYRA (CrYogenic solar spectrogRAph) is a facility instrument of the 1.6-meter Goode Solar Telescope (GST) at Big Bear Observatory (BBSO). focuses on study near-infrared spectrum between 1 and 5 microns, under explored region which not only fertile ground for photospheric magnetic diagnostics, but also allows unique window into chromosphere lying atop photosphere. first ever fully cryogenic spectrograph in any observatory with its two predecessors, McMath-Pierce Mees Telescopes, being based...

Solar observations of carbon monoxide (CO) indicate the existence lower-temperature gas in lower solar chromosphere. We present an observation pores, and quiet-Sun, network magnetic field regions with CO 4.66 {\mu}m lines by Cryogenic Infrared Spectrograph (CYRA) at Big Bear Observatory. used strong around to understand properties thermal structures atmosphere different features various strengths. AIA 1700 {\AA} images, HMI continuum images magnetograms are also included observation. The...