Results 51 to 60 of about 39,482 (251)

Centre-to-limb spectro-polarimetric diagnostics of simulated solar photospheric magneto-convection: signatures of photospheric Alfven waves [PDF]

, 2014
Using numerical simulations of the magnetised solar photosphere carried out with the radiative magneto-hydrodynamic code, MURaM, and detailed spectro-polarimetric diagnostics of the simulated photospheric 6302A FeI line, spectro-polarimetric signatures ...
Przybylski, D., Shelyag, S.
core   +2 more sources

Sulfur‐bearing serpentine in carbonaceous chondrites

Meteoritics &Planetary Science, Volume 60, Issue 12, Page 2864-2890, December 2025.
Abstract A correlative multi‐technique approach, including electron microscopy and X‐ray synchrotron work, has been used to obtain both structural and compositional information of a sulfur‐bearing serpentine identified in several carbonaceous chondrites (Winchcombe CM2, Aguas Zarcas CM2, Ivuna CI, and Orgueil CI), and in Ryugu samples returned by the ...
N. Topping, J. C. Bridges, L. J. Hicks, L. Petera, C. S. Allen, J. Ryu, D. G. Hopkinson, M. Danaie, L. Blase, F. M. Willcocks, G. Douglas, H. G. Changela, T. Noguchi, T. Matsumoto, A. Miyake   +14 more
wiley   +1 more source

Dust in the Photospheric Environment: Unified Cloudy Models of M, L, and T Dwarfs [PDF]

, 2002
We address the problem of how dust forms and how it could be sustained in the static photospheres of cool dwarfs for a long time. In the cool and dense gas, dust forms easily at the condensation temperature, T_cond, and the dust can be in detailed ...
Biemont E., Blackwell D. E., Borysow A., Brett J. M., Brett J. M., Brown L. R., Brown L. R., Delfosse X., Eriksson T. S., Grevesse N., Grevesse N., Hedgecock I. M., Holweger H., Jones H. R. A., Margolis J. S., Mould J., Nakajima T., Ordal M.A., Ossenkopf V., Takashi Tsuji, Tsuji T., Tsuji T., Tsuji T., Tsuji T., Viti S.   +24 more
core   +4 more sources

Exploring the Validation Results of the Advanced Solar Particle Events Casting System (ASPECS)

Space Weather, Volume 23, Issue 11, November 2025.
Abstract Solar Energetic Particle (SEP) events can adversely affect space and ground‐based systems. Space weather effects associated with SEP events can impact communication and navigation systems, spacecraft electronics and operations, space power systems, crewed space missions, and commercial aircraft operations.
Athanasios Papaioannou, George Vasalos, Kathryn Whitman, Philip Quinn, Anastasios Anastasiadis, Markus Leila Mays, Janet Barzilla, Chinwe Didigu, Christopher Light, Claudio Corti, Joycelyn Jones, Anna Chulaki, Hannah Hermann, Edward Semones   +13 more
wiley   +1 more source

Emergence of non-twisted magnetic fields in the Sun: Jets and atmospheric response [PDF]

, 2015
Aims. We study the emergence of a non-twisted flux tube from the solar interior into the solar atmosphere. We investigate whether the length of the buoyant part of the flux tube (i.e.
Archontis, Vasilis, Gontikakis, Costis, Syntelis, Petros, Tsinganos, Kanaris   +3 more
core   +2 more sources

Solar Flare Activity, 1937–2024: Introducing the New Hemispheric Solar Flare Index (hSFI) in the Context of 2024's Major Solar Storm Events

Space Weather, Volume 23, Issue 11, November 2025.
Abstract A new daily composite of the solar flare index (SFI) and the hemispherically‐resolved versions (hSFI) are presented for 1937 to 2024. The data set confirms that the northern hemisphere (NH) dominated solar flare activity during Solar Cycles 17 to 21, but that the southern hemisphere has dominated from Solar Cycle 22 to present.
V. M. Velasco Herrera, W. Soon, S. Knoška, A. Özgüç, G. Velasco Herrera, H. Yeşilyaprak, N. Babynets, M. Švanda, J. Muraközy, S. Qiu, D. Riveros‐Rosas, R. Connolly, M. Connolly, A. Tlatov, L. Cappellotto   +14 more
wiley   +1 more source

Relativistic Radiative Flow in a Luminous Disk

, 2005
Radiatively driven transfer flow perpendicular to a luminous disk was examined under a fully special relativistic treatment, taking into account radiation transfer.
Fukue, Jun
core   +3 more sources

Solar photosphere magnetization [PDF]

Astronomy & Astrophysics, 2020
Context.A recent review shows that observations performed with different telescopes, spectral lines, and interpretation methods all agree about a vertical magnetic field gradient in solar active regions on the order of 3 G km−1, when a horizontal magnetic field gradient of only 0.3 G km−1is found.
openaire   +6 more sources

The First Light From the Joint Total Solar Irradiance Measurement Experiment Onboard the FY‐3E Meteorological Satellite

Earth and Space Science, Volume 12, Issue 10, October 2025.
Abstract The Joint Total Solar Irradiance Monitor (JTSIM) onboard the Fengyun‐3E meteorological satellite has been launched successfully on 4th of July 2021. It aims at measuring the Total Solar Irradiance (TSI) from the Low Earth Orbit. The instruments on the Fengyun‐3E/JTSIM include the Digital Absolute Radiometer (DARA) from the Physikalisch ...
Ping Zhu, Xin Ye, Jean‐Philippe Montillet, Wolfgang Finsterle, Dongjun Yang, Duo Wu, Jin Qi, Wei Fang, Huizeng Liu, Xiuqing Hu, Peng Zhang   +10 more
wiley   +1 more source

The Force-freeness of the Solar Photosphere: Revisit with New Approach and Large Data Sets

The Astrophysical Journal Letters, 2023
Although it is generally believed that the solar photosphere is not magnetically force-free owing to its high plasma β , the estimations of force-freeness using observed magnetograms have produced disputable results.
Mei Zhang, Haocheng Zhang
doaj   +1 more source