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161
The abundances of heavy elements in BL138 – red giant of local group fornax dwarf spheroidal galaxy
Published 2018-08-01“…The analysis of these abundances and also previously published investigation of BL138 allowed claiming that the distribution of abundances is different from that in the solar photosphere. The signs of r-process in the abundance pattern of BL138 are not important. …”
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162
Our dynamic sun: 2017 Hannes Alfvén Medal lecture at the EGU
Published 2017-07-01“…A small-scale dynamo may also be operating near the surface of the Sun, generating magnetic fields that thread the lowest layer of the solar atmosphere, the turbulent photosphere. Above the photosphere lies the highly dynamic fine-scale chromosphere, and beyond that is the rare corona at high temperatures exceeding 1 million degrees K. …”
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163
Investigations of the MnI 539.47 nm and MnI 542.04 nm lines in solar plages
Published 2005-01-01“…We observed the MnI 539.47 nm and 542.04nm line profiles in the quiet photosphere and plage regions in 1998 and 2001, and measured the full widths at half maximum, equivalent widths and depths of these profiles. …”
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164
A Bright First Day for Tidal Disruption Events
Published 2023-01-01“…The average gas temperature at this photospheric surface is a few × 10 ^4 K, roughly consistent with inferred prepeak photosphere properties for some optical TDEs. …”
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165
The Van Hoof Effect over the Blazhko Cycle
Published 2023-01-01“…We investigate the differential motion between the upper and lower photosphere and between the photosphere and high atmosphere in the RR Lyr star. …”
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166
The Three Regimes of Atmospheric Evaporation for Super-Earths and Sub-Neptunes
Published 2023-01-01“…The second regime applies to planets with lower internal temperatures, so a radiative region forms, but the photosphere still remains outside the Bondi radius. …”
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167
Element abundance and the physics of solar energetic particles
Published 2024-03-01“…Thus, SEPs provide a measurement of element abundance in the solar corona, distinct from solar wind, and may even better define the photosphere for some elements.…”
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168
The abundances of heavy elements in the atmosphere of hyades giant 6 Tauri
Published 2017-06-01“…Comparison of synthetic spectrum of the б Tauri photosphere and high quality spectral atlas of this star permit us to identify absorption lines of iron and heavy elements Z ≥ 30 in the observed spectrum. …”
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169
Magnetic Structure of Sunspots
Published 2011-09-01“…We start by offering a brief description of tools that are most commonly employed to infer the magnetic field in the solar atmosphere with emphasis in the photosphere of sunspots. We then address separately the global and local magnetic structure of sunspots, focusing on the implications of the current observations for the different sunspots models, energy transport mechanisms, extrapolations of the magnetic field towards the Corona, and other issues.…”
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170
THE ABUNDANCES OF SOME HEAVY ELEMENTS IN THE ATMOSPHERE OF γ TAURI
Published 2017-07-01“…Comparison of synthetic spectrum of the γ Tauri photosphere and high quality spectral atlases of this star permit us to identify absorption lines of rubidium, indium, disprosium, erbium, osmium in the observed spectra. …”
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171
Asymmetric Twisting of Coronal Loops
Published 2023-03-01“…The bright solar corona entirely consists of closed magnetic loops rooted in the photosphere. Photospheric motions are important drivers of magnetic stressing, which eventually leads to energy release into heat. …”
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172
Outflowing Helium from a Mature Mini-Neptune
Published 2023-01-01“…Here W _avg is the equivalent width of the helium absorption, and ρ _XUV is the density of the planet within the XUV photosphere, but the correlation is similarly strong if we use the optical photosphere. …”
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173
Spatial and temporal variations of Ca II K line profile shapes in different structures of solar chromosphere. I. Features of individual profiles
Published 2018-12-01“…There are, however, structures which begin to differ at the level of the photosphere and continue to differ in the chromosphere. …”
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174
Disentangling the Planet from the Star in Late-Type M Dwarfs: A Case Study of TRAPPIST-1g
Published 2021“…We find that TRAPPIST-1 is a 0.08 M ∗, 0.117 R ∗, M8V star with a photospheric effective temperature of 2400 K, with ∼35% 3000 K spot coverage and a very small fraction, <3%, of ∼5800 K hot spot. …”
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175
Pengamatan dan Analisa Sunspot di Stasion Pengamatan Matahari Haurngombong Tanjungsari
Published 1980“…Sunspot adalah noda hitam yang terdapat pada permukaan matahari (photosphere), yang merupakan salah satu phenomena aktivitas matahari yang dapat dilihat secara visual dengan bantuan fillter cahaya putih. …”
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176
Magnetic Fields in the Solar Convection Zone
Published 2009-12-01“…Thus the magnetic fields need to traverse the entire convection zone before they reach the photosphere to form the observed solar active regions. …”
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177
Re-evaluating hot Jupiter WASP-12b: An update
Published 2013-04-01“…We show that this new spectrum is still consistent with a featureless blackbody, indicating a nearly isothermal photosphere on the planet's day side. Thus the ensemble of occultation measurements for WASP-12b is still insufficient to constrain the planet's atmospheric composition.…”
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178
Propagation Properties of Sunspots Umbral Oscillations in Horizontal and Vertical Directions
Published 2023-01-01“…We speculate that oscillations in two of the umbrae have a common origin in the sub-photosphere, resulting in a stronger correlation (>30%). …”
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179
Artificial Intelligence Assisted Inversion (AIAI): Quantifying the Spectral Features of 56Ni of Type Ia Supernovae
Published 2024-01-01“…The neural networks are applied to derive the mass of ^56 Ni in velocity ranges above the photosphere for a sample of 124 well-observed SNe Ia in the TARDIS model context. …”
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180
Disentangling the Planet from the Star in Late-Type M Dwarfs: A Case Study of TRAPPIST-1g
Published 2022“…We find that TRAPPIST-1 is a 0.08 M ∗, 0.117 R ∗, M8V star with a photospheric effective temperature of 2400 K, with ∼35% 3000 K spot coverage and a very small fraction, <3%, of ∼5800 K hot spot. …”
Get full text
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