Articles tagged with Sunspot Regions
Researchers analyzed over 40 years of astronomical data to find detectable changes inside the Sun during four quiet periods. The study reveals that even small differences in solar magnetic activity produce measurable changes in the Sun's internal structure.
Astronomers discovered a greedy white dwarf star consuming its closest celestial companion at an unprecedented rate. The study found that the super-dense white dwarf is burning brightly due to the mass transfer between the two stars, potentially leading to a massive explosion visible from Earth.
Model simulations reveal a unique pattern of polar vortices that evolves with the solar cycle, shedding light on the Sun's magnetism and potential space weather disruptions. The findings imply that future missions to the Sun may observe these vortices during certain phases of the solar cycle.
The University of Texas at Arlington has been awarded a $1.5 million grant from the National Science Foundation to train scientists in space physics and data science. The grant will also enable UTA to create a specialization in space physics for students pursuing a Bachelor of Science in physics.
Researchers have spotted the first signs of the Sun's next 11-year solar cycle, which is expected to start in about six years. The detection was made using sound waves inside the Sun and shows a faint indication of Cycle 26, similar to what happened during the previous cycles.
Researchers uncover possible origins of sun's engine, the solar dynamo, which drives sunspots and solar storms. The study reveals that the dynamo may begin in the sun's outermost layers, contradicting decades-old theories.
A new study suggests that the sun's magnetic field could arise from instabilities in the outermost layers of the sun, rather than deep within. This finding may enable scientists to better forecast solar activity and space weather.
Researchers used NASA's High Resolution Coronal Imager and Interface Region Imaging Spectrograph to study the Sun's moss, which is heated from 10,000 to 1 million degrees Fahrenheit. The observations revealed that electrical currents may play a role in this superheating mechanism.
A recent solar coronal mass ejection caused aurorae at low latitudes, while a historically significant event in 1872 was found to be one of the most extreme geomagnetic storms in history. The storm's impact on modern society could be severe, with potential disruptions to power grids, communication systems, and satellite communications.
A new relationship between the Sun's magnetic field and its sunspot cycle has been discovered, enabling scientists to predict when the peak in solar activity will occur. The analysis indicates that the maximum intensity of solar cycle 25 is imminent and likely to occur within a year.
Researchers from NJIT-CSTR have discovered an extraordinary aurora-like display occurring 40,000 km above a sunspot. The novel radio emission shares characteristics with planetary magnetospheres and potentially opens new avenues for understanding similar phenomena in distant stars with large starspots.
Astronomers have identified a nearby Sun-like star that has paused its own cycles and entered a similar period of rare starspots, sparking hope for understanding the Sun's 70-year Maunder Minimum. Continued observation could provide crucial insights into the Sun's stellar magnetic activity, potentially affecting climate on Earth.
Scientists predict that Sunspot Cycle 25 will be one of the strongest on record due to its predicted peak sunspot number. The new cycle is forecasted to start with a bang, and if correct, it would support the research team's theory about the Sun's internal magnetic machine.
The Inouye Solar Telescope has released its first image of a sunspot, revealing striking details of the sunspot's structure. The image achieves a spatial resolution about 2.5 times higher than ever previously achieved, showing magnetic fields as small as 20 kilometers on the surface of the Sun.
The NSF's National Solar Observatory has predicted the arrival of a large sunspot on November 18, coinciding with Thanksgiving. The prediction uses helioseismology to detect changes in sound waves from the Sun's interior and is valuable for understanding space weather effects.
A team of astronomers studied sunspots to characterize star conditions, which is crucial for finding exoplanets. The research aimed to create a single emission profile similar to other stars, allowing astronomers to identify dimming caused by exoplanet shadows.
Researchers at Instituto de Astrofísica de Canarias confirm the presence of resonating cavities above sunspots. These cavities, similar to those found in wind instruments or guitar strings, trap certain frequencies and cause resonances.
Researchers from NYU Abu Dhabi used helioseismology to analyze the Sun's interior and found that the meridional flow is a single cell in each hemisphere. This process determines the characteristics of the sunspot cycle, supporting the flux-transport dynamo model.
Scientists studied sunspots and their movement, discovering a giant cell in each hemisphere with plasma moving towards the equator at 15 km/h. The meridional flow explains why sunspots emerge closer to the equator as solar cycles progress.
A study of 369 solar-like stars reveals that the Sun's solar brightness variations are among the weakest, with fluctuations typically about 5 times stronger in other stars. The research suggests that our star may have been unusually inactive over the past 9000 years.
A new study found that gray whales are more likely to strand themselves on days with high sunspot counts, suggesting a disruption to their magnetoreceptive sensor. This suggests that solar storms may cause whales to become disoriented and lose their magnetic sense.
A University of Washington study proposes a model of plasma motion that explains the 11-year sunspot cycle and other solar phenomena. The model suggests that a thin layer beneath the sun's surface is key to understanding solar magnetic phenomena, including sunspots, magnetic reversals, and solar flow.
Researchers have identified 'terminator' events that mark the end of sunspot cycles, potentially triggering plasma tsunamis and the start of new solar cycles. The study provides insight into the mysterious timing of sunspot cycles, which are crucial for predicting solar storms that can disrupt Earth's upper atmosphere.
Researchers using NASA's IRIS have found evidence of pseudo-shocks, which may contribute to the corona's heat during solar maximums. The discovery adds a new clue to the long-standing mystery of coronal heating.
A team of scientists developed a single, cohesive computer model to simulate the entire life cycle of a solar flare, from energy buildup to explosive release. The comprehensive model captures the formation of tangled magnetic field lines and roiling sunspots, which can impact Earth's power grids, communications networks, and astronauts.
Researchers developed a new technique to visualize historic solar data, providing context for understanding the Sun's past and future. The study suggests that changes in solar activity may impact Earth's surface, with possible connections to climate change.
Scientists at New Jersey Institute of Technology's Owens Valley Solar Array (EOVSA) captured potent solar flares in multiple radio frequencies for the first time. The new data reveals that high-energy particles are promptly transported throughout the explosive magnetic field, shedding light on the acceleration process.
Researchers detect heat produced by Alfvén waves in a sunspot, shedding light on the Sun's extremely high temperatures. The discovery opens up new understanding of this phenomenon and its potential applications in energy reactors and medical devices.
Scientists analyzed data from HINODE to reveal a strongly magnetized iron atom signature in a sunspot, with a magnetic field strength of 6,250 gauss, more than double the usual amount. The strongest field was found at a bright region between two umbrae, not in the dark core as expected.
Researchers analyzed over 60 years of solar microwave data and found consistent microwave intensities and spectra at the minimums of each cycle, contrasting with varying intensity and spectrum during periods of maximum solar activity. This discovery sheds light on understanding the creation and amplification of solar magnetic fields.
A solar flare was recorded by a 17-year-old amateur astronomer, Juan Valderrama y Aguilar, from Madrid on September 10, 1886. The event is the third white-light solar flare in history and marks a significant discovery in solar physics.
A new study recounts the life and work of Hisako Koyama, a pioneering female solar observer who created detailed sunspot drawings for over 40 years. Her archive was used to establish a continuous record of sunspots stretching back to 1610, shedding light on the solar cycle and its influence on Earth.
A sunspot, dubbed AR12665, was tracked by NASA's satellites as it rotated into view on July 5, 2017. The active region produced several solar flares, a coronal mass ejection, and a solar energetic particle event over its 13-day journey.
A new sunspot group has emerged on the sun, with its dark core larger than Earth, in a video captured by NASA's Solar Dynamics Observatory between July 5-11, 2017. This is the first sunspot to appear after two days of solar spotlessness during the sun's regular 11-year cycle.
The GREGOR solar telescope has demonstrated its potential with high precision measurements of magnetic fields and material motion. High spatial resolution imaging data have also provided unprecedented details of the Sun's photosphere, revealing features smaller than 100 km in sunspot light bridges.
Researchers discovered that solar flares accelerate sunspot rotation speeds, revealing a complex relationship between the Sun's magnetic fields. This phenomenon challenges current theories on solar flares and has significant implications for understanding energy transport in eruptions.
Researchers discovered unique starspots on nearby star Zeta Andromedae, differing significantly from the Sun's spots. The findings offer a rare glimpse into the Sun's infancy and challenge current theories about star magnetic fields.
Astrophysicists have observed a distant star in Andromeda with a different positioning of sunspots, indicating a magnetic field driven by unique internal dynamics. The star's rapid rotation creates a powerful magnetic field, resulting in asymmetrical distribution of sunspots on its surface.
Russian scientists have predicted a decrease in solar magnetic activity, which could lead to cooler temperatures in Europe. The researchers used analysis of solar radiation and isotopes to create a model that predicts the Sun's behavior over the next thousand years.
A team of scientists analyzed observations of sunspots as they formed using data from Hinode, SDO, and IRIS satellites. They modeled the observations using state-of-the-art numerical simulations performed on the Pleiades supercomputer at NASA Ames Research Center. The study reveals that the territorial struggles between magnetic bundle...
A new correction of the sunspot number suggests that solar activity has remained relatively stable since the 1700s, contradicting previous claims of a Modern Grand Maximum. This finding challenges existing climate evolution models and could reveal more about the role of the Sun in climate change over longer timescales.
Researchers predict a new Little Ice Age may begin by 2030, with reduced solar activity leading to significant cooling of the Earth's atmosphere. This decrease in solar irradiance could result in severe winters and cold summers, similar to those experienced during the Maunder minimum in the 17th century.
Scientists at NJIT's Big Bear Solar Observatory have captured groundbreaking images of the Sun's interior structure, revealing complex dynamics of sunspots' dark cores. The high-resolution images show finely structured plasma flows and oscillating cool jets piercing the hot atmosphere.
Scientists at the Institute of Nuclear Physics in Poland used multifractal analysis to study sunspots and found asymmetrical patterns that may indicate an unknown physical process. The researchers believe these findings could provide new insights into solar activity and potentially discard current trends.
Researchers have standardized historical sunspot data, revealing that solar activity has been consistent throughout history, including during the Enlightenment. The study also shows that there were intense periods of solar activity in the past, such as the Maunder minimum.
Researchers have developed a method to calculate the ages of individual stars by measuring their spin periods and masses. The technique, known as gyrochronology, uses mathematical relationships between mass, rotation rate, and age to determine stellar ages with precision.
A mid-level solar flare was detected by NASA's Solar Dynamics Observatory on Nov 16, 2014, emerging from an active region that previously rotated across the front of the sun in October. The M5.7-class flare is a tenth the size of X-class flares and may disturb GPS and communications signals.
The largest sunspot of the solar cycle, AR 12192, was tracked by NASA's Solar Dynamics Observatory. The active region produced six X-class flares and four strong M-class flares, with the largest flare reaching X3.1 intensity. Despite the intense activity, no coronal mass ejections were observed.
A large active region on the sun erupted with an X-class flare on October 27, 2014, its fourth since October 24. The flare was part of a week-long series of substantial flares beginning on October 19.
Brightpoints provide a new way to track magnetic field evolution and material flow inside the sun. Researchers found that bands of these markers moved steadily toward the equator over time, along the same path as sunspots.
Multi-wavelength observations of sunspots have provided new insights into their complex and dynamic nature. The data revealed rapidly rotating plasma rolls, powerful shocks, and widespread plasma eruptions driven by solar-energy flux and controlled by intense magnetic fields.
A team of scientists, including a professor from Moscow State University, has developed the first quantitative description of sunspot formation and the Solar activity cycle. By monitoring magnetic field helicity in active regions, they gained insight into the Sun's interior and its impact on solar activity.
A giant sunspot has reappeared over the sun's horizon, marking its third trip around the sun in approximately 27 days. This region has produced two X-class solar flares and numerous mid-level flares during its previous trips.
Scientists observe enormous sunspot AR1944, two Earths wide, moving toward the sun's center. The sunspot is part of active regions that can cause space weather events, such as solar flares and coronal mass ejections.
Two large sunspots, AR1890 and AR1897, are active on the sun, with AR1890 producing significant flares and AR1897 nearing its appearance on Earth-side of the sun. The sun's 11-year activity cycle is increasing towards solar maximum conditions, leading to an uptick in flares.
Scientists have developed a mechanism to understand the cyclical nature of the Sun's magnetic activity, which is responsible for 'space weather' phenomena like solar flares and coronal mass ejections. This discovery provides a solution to mathematical equations governing fluids and electromagnetism for large astrophysical bodies.
A giant sunspot formed on the sun's surface over Feb. 19-20, 2013, with rapid growth to six Earth diameters across in under 48 hours. The spot's delta region exhibited unstable magnetic fields, potentially leading to solar flares.
Researchers found a correlation between low solar activity and cold Central European winters, with the Rhine River serving as a proxy. The study suggests that periods of low sunspot numbers lead to regional cooling, with implications for climate research and the debate on anthropogenic climate change.
A new study reveals a correlation between low solar activity and unusually cold winters in Central Europe, particularly along the Rhine River. The researchers used historical records of riverboat shipments and found that ten out of fourteen freezing episodes occurred during years with minimal sunspots.
A recent M-class flare from Sunspot 1515 caused a moderate radio blackout, affecting high- and low-frequency radio communication and GPS signals. The flare was classified as an M6.1, approximately half the size of weakest X-class flares.