Results 91 to 100 of about 320,186 (190)

Comparison of Solar Energetic Particle Flux Measurements by CRaTER and GOES

Space Weather, Volume 23, Issue 4, April 2025.
Abstract The Cosmic Ray Telescope for the Effects of Radiation (CRaTER) aboard the Lunar Reconnaissance Orbiter spacecraft has been operating in lunar orbit since 2009. CRaTER data provide a long‐term record of the near‐Moon radiation environment that is relevant to human exploration.
C. Zeitlin, A. S. Johnson, N. A. Schwadron, H. E. Spence, J. Wilson, A. W. Case, K. T. Lee, M. D. Looper, J. E. Mazur   +8 more
wiley   +1 more source

A systematic study of the inner rotation curves of galaxies observed as part of the GASS and COLD GASS surveys [PDF]

, 2015
We present a systematic analysis of the rotation curves of 187 galaxies with masses greater than 10^10 M_sol, with atomic gas masses from the GALEX Arecibo Sloan Survey (GASS), and with follow-up long-slit spectroscopy from the MMT. Our analysis focuses on stellar rotation curves derived by fitting stellar template spectra to the galaxy spectra binned ...
arxiv   +1 more source

Rotation and mass of the sa galaxy, ngc 681 [PDF]

Rotation curve, mass distribution, and mass density of SA galaxy, NGC ...
Burbridge, E. M., Burbridge, G. R., Prendergast, K. H.   +2 more
core   +1 more source

Nowcasting Solar Energetic Particle Events for Mars Missions

Space Weather, Volume 23, Issue 4, April 2025.
Abstract In addition to the omnipresent Galactic Cosmic Rays, sudden Solar Energetic Particle (SEP) events present considerable health hazards for manned space missions. These events not only contribute to an increased long‐term cancer risk, but can, in extreme cases, cause acute radiation syndromes.
Jan Leo Löwe, Salman Khaksarighiri, Robert F. Wimmer‐Schweingruber, Donald M. Hassler, Bent Ehresmann, Jingnan Guo, Günther Reitz, Thomas Berger, Daniel Matthiä, Cary Zeitlin, Sven Löffler   +10 more
wiley   +1 more source

CONSTRAINTS ON THE DECOMPOSITION OF THE ROTATION CURVES OF SPIRAL GALAXIES [PDF]

The Identification of Dark Matter, 2003
I discuss anew how arguments about the internal dynamics of galactic disks set constraints on the otherwise ambiguous decomposition of the rotation curves of spiral galaxies into the contributions by the various constituents of the galaxies. Analyzing the two sample galaxies NGC 3198 and NGC 2985 I conclude from the multiplicities of the spiral arms ...
openaire   +3 more sources

Fundamental Parameters of the Milky Way Galaxy Based on VLBI astrometry

, 2012
We present analyses to determine the fundamental parameters of the Galaxy based on VLBI astrometry of 52 Galactic maser sources obtained with VERA, VLBA and EVN.
Ando, Kazuma, Bushimata, Takeshi, Choi, Yoon Kyung, Handa, Toshihiro, Hirota, Tomoya, Honma, Mareki, Imai, Hiroshi, Jike, Takaaki, Kameya, Osamu, Kawaguchi, Noriyuki, Kim, Mi Kyoung, Kobayashi, Hideyuki, Kuji, Seisuke, Kurayama, Tomoharu, Manabe, Seiji, Matsumoto, Naoko, Miyaji, Takeshi, Motogi, Kazuhito, Nagayama, Takumi, Nakagawa, Akiharu, Nakanishi, Hiroyuki, Niinuma, Notaro, Oh, Chung Sik, Omodaka, Toshihiro, Oyama, Tomoaki, Sakai, Nobuyuki, Sato, Katsuhisa, Sato, Mayumi, Shibata, Katsunori, Shiozaki, Satoshi, Sunada, Kazuyoshi, Tamura, Yoshiaki, Ueno, Yuji, Yamauchi, Aya   +33 more
core   +1 more source

Review of asteroid, meteor, and meteorite‐type links

Meteoritics &Planetary Science, Volume 60, Issue 4, Page 928-973, April 2025.
Abstract With the goal to determine the origin of our meteorites in the asteroid belt, video and photographic observations of meteors have now tracked 75 meteorite falls. Six years ago, there were just hints that different meteorite types arrived on different orbits, but now, the number of orbits (N) is high enough for distinct patterns to emerge.
Peter Jenniskens, Hadrien A. R. Devillepoix   +1 more
wiley   +1 more source

The Calculations of Gravity Fields and Rotation Curves of Whirlpool Galaxies and Dark Material [PDF]

arXiv, 2009
The gravity fields and rotation curves of whirlpool galaxies with thin disc distribution of material are calculated numerically. It is proved that the gravity field of mass thin disc distribution is greatly different from that of spherically symmetrical distribution.
arxiv  

Barions and $Λ$CDM Model Problems [PDF]

Astronomy Reports, 2022, Volume 66, Issue 2, p.102-115
We examine the inner profiles of the rotation curves of galaxies in the velocity range from dwarf galaxies to Milky-way like galaxies, having maximum of rotation, $V_{\rm max}$, in the range [30-250] km/s, whose diversity is much larger than that predicted by the $\Lambda$CDM model. After showing that the scatter in the observed rotation curves is much
arxiv   +1 more source

A kinematically decoupled component in NGC4778

, 2007
We present a kinematical and photometrical study of a member, NGC4778, of the nearest (z=0.0137) compact group: Hickson 62. Our analysis reveals that Hickson 62a, also known as NGC4778, is an S0 galaxy with kinematical and morphological peculiarities ...
Iodice, E., Longo, G., Paolillo, M., Spavone, M.   +3 more
core