Zobrazeno 1 - 10
of 18
pro vyhledávání: '"Milky Way magnetic fields"'
Publikováno v:
The Astrophysical Journal Letters, Vol 975, Iss 1, p L21 (2024)
We calculate the arrival direction distribution of ultrahigh-energy cosmic rays (UHECRs) with a new suite of models of the Galactic magnetic field (GMF), assuming sources follow the large-scale structure of the Universe. Compared to previous GMF mode
Externí odkaz:
https://doaj.org/article/36b9bd19df5a4de3bd5f2cfeada7e528
Autor:
Michael Unger, Glennys R. Farrar
Publikováno v:
The Astrophysical Journal Letters, Vol 962, Iss 1, p L5 (2024)
The Telescope Array Collaboration recently reported the detection of a cosmic-ray particle, “Amaterasu,” with an extremely high energy of 2.4 × 10 ^20 eV. Here we investigate its probable charge and the locus of its production. Interpreted as a
Externí odkaz:
https://doaj.org/article/654d4fedb8c045d0ab2442ef6199bb4d
Publikováno v:
The Astrophysical Journal, Vol 975, Iss 2, p 217 (2024)
We develop a new method for studying the Galactic magnetic field along the spiral arms using pulsar Faraday rotation measures (RMs). Our new technique accounts for the dot-product nature of Faraday rotation and also splits the associated path integra
Externí odkaz:
https://doaj.org/article/eaeef4dddb034527897a0f2f7fc87bba
Autor:
Michael Unger, Glennys R. Farrar
Publikováno v:
The Astrophysical Journal, Vol 970, Iss 1, p 95 (2024)
We present a suite of models of the coherent magnetic field of the Galaxy based on new divergence-free parametric functions describing the global structure of the field. The model parameters are fit to the latest full-sky Faraday rotation measures (R
Externí odkaz:
https://doaj.org/article/fdf54422f58f4050bde0920ed57f6698
Autor:
Y. Angarita, M. J. F. Versteeg, M. Haverkorn, A. Marchal, C. V. Rodrigues, A. M. Magalhães, R. Santos-Lima, Koji S. Kawabata
Publikováno v:
The Astronomical Journal, Vol 168, Iss 1, p 47 (2024)
Angular dispersion functions are typically used to estimate the fluctuations in polarization angle around the mean magnetic field orientation in dense regions, such as molecular clouds. The technique provides accurate turbulent-to-regular magnetic fi
Externí odkaz:
https://doaj.org/article/b1532f72b03e43f39e2178d427215e42
Publikováno v:
The Astrophysical Journal, Vol 968, Iss 2, p 107 (2024)
The full, radio to γ -ray spectrum of the Fermi bubbles is shown to be consistent with standard strong-shock electron acceleration at the bubble edge, without the unnatural energy cutoffs and unrealistic electron cooling of previous studies, if the
Externí odkaz:
https://doaj.org/article/193ea63ee9f844a2ba0fbac42859d842
Autor:
Teresa Bister, Glennys R. Farrar
Publikováno v:
The Astrophysical Journal, Vol 966, Iss 1, p 71 (2024)
A dipole anisotropy in ultra–high-energy cosmic ray (UHECR) arrival directions, of extragalactic origin, is now firmly established at energies E > 8 EeV. Furthermore, the UHECR angular power spectrum shows no power at smaller angular scales than th
Externí odkaz:
https://doaj.org/article/b4bfea10f4174aa4befc9b664517ea68
Autor:
M. J. F. Versteeg, Y. Angarita, A. M. Magalhães, M. Haverkorn, C. V. Rodrigues, R. Santos-Lima, Koji S. Kawabata
Publikováno v:
The Astronomical Journal, Vol 167, Iss 4, p 177 (2024)
Starlight polarimetry, when combined with accurate distance measurements, allows for exploration of the three-dimensional structure of local magnetic fields in great detail. We present optical polarimetric observations of stars in and close to the So
Externí odkaz:
https://doaj.org/article/8341e0283ff94c3fa895e187fbd0e7b1
Autor:
Yasuo Doi, Kengo Nakamura, Koji S. Kawabata, Masafumi Matsumura, Hiroshi Akitaya, Simon Coudé, Claudia V. Rodrigues, Jungmi Kwon, Motohide Tamura, Mehrnoosh Tahani, Antonio Mario Magalhães, Reinaldo Santos-Lima, Yenifer Angarita, José Versteeg, Marijke Haverkorn, Tetsuo Hasegawa, Sarah Sadavoy, Doris Arzoumanian, Pierre Bastien
Publikováno v:
The Astrophysical Journal, Vol 961, Iss 1, p 13 (2024)
The Galactic global magnetic field is thought to play a vital role in shaping Galactic structures such as spiral arms and giant molecular clouds. However, our knowledge of magnetic field structures in the Galactic plane at different distances is limi
Externí odkaz:
https://doaj.org/article/a97975d425674a2f9a8a2e88c16ce00c
Publikováno v:
The Astrophysical Journal, Vol 961, Iss 1, p 29 (2024)
Filamentary structures in neutral hydrogen (H i ) emission are well aligned with the interstellar magnetic field, so H i emission morphology can be used to construct templates that strongly correlate with measurements of polarized thermal dust emissi
Externí odkaz:
https://doaj.org/article/40a224804bdd4a00babab7f024dd048c