Results 51 to 60 of about 372 (130)

Magnetic Fields in the Southern Coalsack and Beyond

The Astronomical Journal
Starlight polarimetry, when combined with accurate distance measurements, allows for exploration of the three-dimensional structure of local magnetic fields in great detail.
M. J. F. Versteeg, Y. Angarita, A. M. Magalhães, M. Haverkorn, C. V. Rodrigues, R. Santos-Lima, Koji S. Kawabata   +6 more
doaj   +1 more source

Heliosphere in a strong interstellar magnetic field

Journal of Physics: Conference Series, 2017
We present results of MHD simulations of the global structure of the heliosphere for a wide range of the interstellar magnetic field (ISMF) strengths (2-20 µG). For a strong interstellar field, the plasma flow in and around the heliosphere as well as the magnetic field draped over the heliopause have a simple structure, reminiscent of (though not ...
A Czechowski, J Grygorczuk
openaire   +1 more source

The Constraint of Crewed Mars Missions Based on Current Radiation Dose Measurements

Space Weather, Volume 24, Issue 3, March 2026.
Abstract Crewed missions to Mars will be a milestone of future space exploration programs. However, the absence of Earth's magnetic field leaves astronauts directly exposed to unattenuated energetic particles in deep space, primarily galactic cosmic rays (GCRs), resulting in significantly higher radiation levels and enhanced health risks. Understanding
Chao Zhang, Weihao Liu, Jingnan Guo, Mikhail Dobynde, Robert F. Wimmer‐Schweingruber   +4 more
wiley   +1 more source

Atmospheric and Deposition Responses of 10Be to Volcanic Eruptions Inferred From the Aerosol‐Climate Model ECHAM6.3‐HAM2.3‐SALSA2.0: 10Be

Geophysical Research Letters, Volume 53, Issue 4, 28 February 2026.
Abstract 10Be deposition in ice cores is widely used for solar reconstructions, but its interpretation is complicated by volcanic influences. Using the state‐of‐the‐art aerosol‐climate model ECHAM6.3‐HAM2.3‐SALSA2.0: 10Be, we assess the impacts of three major volcanic eruptions: Agung (1963), El Chichón (1982) and Pinatubo (1991). All eruptions enhance
Minjie Zheng, Raimund Muscheler, Anton Laakso, Florian Adolphi, Zhengyao Lu, Mousong Wu, Peng Chen, Qin Tao, Ulrike Lohmann   +8 more
wiley   +1 more source

Applying the Velocity Gradient Technique in NGC 1333: Comparison with Dust Polarization Observations

The Astrophysical Journal
Magnetic fields ( B -fields) are ubiquitous in the interstellar medium (ISM), and they play an essential role in the formation of molecular clouds and subsequent star formation.
Archana Soam, Ka Ho Yuen, Ian Stephens, Chi Yan Law, Ka Wai Ho, Simon Coudé   +5 more
doaj   +1 more source

Reduced Geomagnetic Shielding During the Laschamps Excursion and Its Impact on Cosmic‐Ray‐Induced Atmospheric Radiation

Journal of Geophysical Research: Space Physics, Volume 131, Issue 2, February 2026.
Abstract The Laschamps geomagnetic excursion (≈41,000 years BP) was a period of significant weakening and incomplete reversal of the Earth's magnetic field. The weakening substantially reduced geomagnetic shielding against cosmic rays (CRs), which contribute to phenomena at Earth, such as cosmogenic isotope production, and atmospheric ionisation and ...
N. Larsen, I. Usoskin, A. Mishev, S. Koldobskiy, P. Väisänen   +4 more
wiley   +1 more source

Slope of Magnetic Field–Density Relation as an Indicator of Magnetic Dominance

The Astrophysical Journal
The electromagnetic field is a fundamental force in nature that regulates the formation of stars in the Universe. Despite decades of efforts, a reliable assessment of the importance of the magnetic fields in star formation relations remains missing.
Mengke Zhao, Guang-Xing Li, Keping Qiu
doaj   +1 more source

Systematic Underestimation of Polarization Angle Dispersion and Its Consequences for Magnetic Field Strength Estimates in Star-forming Regions

The Astrophysical Journal
Polarised dust emission observations are a valuable tool to infer the structure of the magnetic field, and the dispersion of polarization position angles may be used to estimate magnetic field strengths. A natural consequence of magnetodynamic turbulence
Seamus D. Clarke, Ya-Wen Tang, Patrick M. Koch, Gary A. Fuller, Dawei Xi   +4 more
doaj   +1 more source

Evidence of Gradients of Density and Magnetic Field in the Remnant of Tycho’s Supernova

The Astrophysical Journal
By using surface brightness maps of Tycho’s supernova remnant (SNR) in radio and X-rays, along with the properties of thermal and synchrotron emission, we have derived the postshock density and magnetic field (MF) strength distributions over the ...
Oleh Petruk, Taras Kuzyo, Mariana Patrii, Laura Chomiuk, Maria Arias, Marco Miceli, Salvatore Orlando, Fabrizio Bocchino   +7 more
doaj   +1 more source

Interstellar Polarization Survey. V. Galactic Magnetic Field Tomography of the Spiral Arms Using Optical and Near-infrared Starlight Polarization

The Astronomical Journal
Interstellar linear polarization occurs when starlight passes through elongated dust grains aligned by interstellar magnetic fields. The observed polarization can come from different dust structures along the line of sight (LOS).
Y. Angarita, M. J. F. Versteeg, M. Haverkorn, V. Pelgrims, C. V. Rodrigues, A. M. Magalhães, R. Santos-Lima, Koji S. Kawabata   +7 more
doaj   +1 more source