Variation of small scale magnetic fields over a century using Ca-K images as proxy Article Swipe
Jagdev Singh
,
Muthu Priyal
,
B. Ravindra
,
Luca Bertello
,
Alexei Pevtsov
·
YOU?
·
· 2023
· Open Access
·
· DOI: https://doi.org/10.48550/arxiv.2301.07350
YOU?
·
· 2023
· Open Access
·
· DOI: https://doi.org/10.48550/arxiv.2301.07350
A combined uniform and long-time series of Ca-K images from the Kodaikanal Observatory (KO), Mount Wilson Observatory (MWO), and Mauna Loa Solar Observatory (MLSO) were used to identify and study the Ca-K small-scale features and their solar cycle variations over a century. The small scale features are classified into three distinct categories: enhanced network (EN), active network (AN), and quiet network (QN). All these features show that their areas vary according to the 11-year solar cycle. The relative amplitude of the Ca-K network variations agree with that of the sunspot cycle. The total area of these small-scale features varies from about 5% during the minimum phase of the solar cycle to about 20% during its maximum phase. Considering the average intensity and the amplitude of their area variations, we find that the total contribution of EN, AN and QN to the irradiance variation of the Sun is about 3%.
Related Topics
Concepts
Observatory
Sunspot
Solar cycle
Amplitude
Variation (astronomy)
Solar observatory
Solar minimum
Solar cycle 23
Scale (ratio)
Physics
QUIET
Solar cycle 24
Astrophysics
Solar irradiance
Atmospheric sciences
Meteorology
Astronomy
Magnetic field
Optics
Solar wind
Quantum mechanics
Metadata
- Type
- preprint
- Language
- en
- Landing Page
- http://arxiv.org/abs/2301.07350
- https://arxiv.org/pdf/2301.07350
- OA Status
- green
- Related Works
- 10
- OpenAlex ID
- https://openalex.org/W4317549630
All OpenAlex metadata
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https://openalex.org/W4317549630Canonical identifier for this work in OpenAlex
- DOI
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https://doi.org/10.48550/arxiv.2301.07350Digital Object Identifier
- Title
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Variation of small scale magnetic fields over a century using Ca-K images as proxyWork title
- Type
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preprintOpenAlex work type
- Language
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enPrimary language
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2023Year of publication
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2023-01-18Full publication date if available
- Authors
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Jagdev Singh, Muthu Priyal, B. Ravindra, Luca Bertello, Alexei PevtsovList of authors in order
- Landing page
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https://arxiv.org/abs/2301.07350Publisher landing page
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https://arxiv.org/pdf/2301.07350Direct link to full text PDF
- Open access
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YesWhether a free full text is available
- OA status
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greenOpen access status per OpenAlex
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https://arxiv.org/pdf/2301.07350Direct OA link when available
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Observatory, Sunspot, Solar cycle, Amplitude, Variation (astronomy), Solar observatory, Solar minimum, Solar cycle 23, Scale (ratio), Physics, QUIET, Solar cycle 24, Astrophysics, Solar irradiance, Atmospheric sciences, Meteorology, Astronomy, Magnetic field, Optics, Solar wind, Quantum mechanicsTop concepts (fields/topics) attached by OpenAlex
- Cited by
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0Total citation count in OpenAlex
- Related works (count)
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10Other works algorithmically related by OpenAlex
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| abstract_inverted_index.(EN), | 54 |
| abstract_inverted_index.(KO), | 13 |
| abstract_inverted_index.(QN). | 61 |
| abstract_inverted_index.Mauna | 19 |
| abstract_inverted_index.Mount | 14 |
| abstract_inverted_index.Solar | 21 |
| abstract_inverted_index.about | 100, 111, 147 |
| abstract_inverted_index.agree | 84 |
| abstract_inverted_index.areas | 68 |
| abstract_inverted_index.cycle | 37, 109 |
| abstract_inverted_index.phase | 105 |
| abstract_inverted_index.quiet | 59 |
| abstract_inverted_index.scale | 44 |
| abstract_inverted_index.small | 43 |
| abstract_inverted_index.solar | 36, 74, 108 |
| abstract_inverted_index.study | 29 |
| abstract_inverted_index.their | 35, 67, 125 |
| abstract_inverted_index.these | 63, 95 |
| abstract_inverted_index.three | 49 |
| abstract_inverted_index.total | 92, 132 |
| abstract_inverted_index.(MLSO) | 23 |
| abstract_inverted_index.(MWO), | 17 |
| abstract_inverted_index.Wilson | 15 |
| abstract_inverted_index.active | 55 |
| abstract_inverted_index.cycle. | 75, 90 |
| abstract_inverted_index.during | 102, 113 |
| abstract_inverted_index.images | 8 |
| abstract_inverted_index.phase. | 116 |
| abstract_inverted_index.series | 5 |
| abstract_inverted_index.varies | 98 |
| abstract_inverted_index.11-year | 73 |
| abstract_inverted_index.average | 119 |
| abstract_inverted_index.maximum | 115 |
| abstract_inverted_index.minimum | 104 |
| abstract_inverted_index.network | 53, 56, 60, 82 |
| abstract_inverted_index.sunspot | 89 |
| abstract_inverted_index.uniform | 2 |
| abstract_inverted_index.century. | 41 |
| abstract_inverted_index.combined | 1 |
| abstract_inverted_index.distinct | 50 |
| abstract_inverted_index.enhanced | 52 |
| abstract_inverted_index.features | 33, 45, 64, 97 |
| abstract_inverted_index.identify | 27 |
| abstract_inverted_index.relative | 77 |
| abstract_inverted_index.according | 70 |
| abstract_inverted_index.amplitude | 78, 123 |
| abstract_inverted_index.intensity | 120 |
| abstract_inverted_index.long-time | 4 |
| abstract_inverted_index.variation | 142 |
| abstract_inverted_index.Kodaikanal | 11 |
| abstract_inverted_index.classified | 47 |
| abstract_inverted_index.irradiance | 141 |
| abstract_inverted_index.variations | 38, 83 |
| abstract_inverted_index.Considering | 117 |
| abstract_inverted_index.Observatory | 12, 16, 22 |
| abstract_inverted_index.categories: | 51 |
| abstract_inverted_index.small-scale | 32, 96 |
| abstract_inverted_index.variations, | 127 |
| abstract_inverted_index.contribution | 133 |
| cited_by_percentile_year | |
| countries_distinct_count | 0 |
| institutions_distinct_count | 5 |
| sustainable_development_goals[0].id | https://metadata.un.org/sdg/7 |
| sustainable_development_goals[0].score | 0.5 |
| sustainable_development_goals[0].display_name | Affordable and clean energy |
| citation_normalized_percentile.value | 0.01186268 |
| citation_normalized_percentile.is_in_top_1_percent | False |
| citation_normalized_percentile.is_in_top_10_percent | False |