Results 11 to 20 of about 8,038 (262)
The dynamics of long-lived spiral arms
EPJ Web of Conferences, 2012 It has been believed that spiral arms in pure stellar disks decay in several galactic rotations due to the heating by the spiral arms. However, it might be caused by a numerical heating.
Wada K. +5 more
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MOLECULAR DISTRIBUTION IN THE SPIRAL ARM OF M51 [PDF]
The Astrophysical Journal, 2016 ABSTRACT Molecular line images of 13CO, C18O, CN, CS, CH3OH, and HNCO are obtained toward the spiral arm of M51 at a resolution with the Combined Array for Research in Millimeter-wave Astronomy.
Watanabe, Yoshimasa +4 more
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Magnetic spiral arms and galactic outflows [PDF]
Monthly Notices of the Royal Astronomical Society: Letters, 2014 AbstractGalactic magnetic arms have been observed between the gaseous arms of some spiral galaxies; their origin remains unclear. We suggest that magnetic spiral arms can be naturally generated in the interarm regions because the galactic fountain flow or wind is likely to be weaker there than in the arms.
Chamandy L, Shukurov A, Subramanian K
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Bulletin of the Seismological Society of America, 2015 Seismic arrays have many uses for signal enhancement, from surface-wave characterization of the near surface to teleseismic detection in the context of monitoring nuclear tests. Many variants of the geometrical configuration of stations have been used with the objective of maximizing potential resolution of the incoming wavefronts di- rection of ...
Kennett, Brian +2 more
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Kinematics of the Local Spiral Structure Revealed by Young Stars in Gaia DR3
The Astrophysical Journal Supplement Series, 2023 Using young open clusters and O–B2-type stars in Gaia Data Release 3, we investigate the kinematics of the local spiral structure. In general, the young sources in the outer spiral arms may present larger peculiar motions than those in the inner spiral ...
Dejian Liu +6 more
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Nature, 1971 The Spiral Structure of Our Galaxy . Edited by W. Becker and G. Contopoulos. (International Astronomical Union Symposium No. 36, held in Basel, Switzerland, August 29–September 4, 1969.) Pp. xiii + 478. (Reidel: Dordrecht, 1970.) Hfl. 80.
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GALACTIC SPIRAL ARMS BY SWING AMPLIFICATION [PDF]
The Astrophysical Journal, 2016 ABSTRACT Based on the swing amplification model of Julian & Toomre, we investigate the formation and structure of stellar spirals in disk galaxies. We calculate the pitch angle, wavelengths, and amplification factor of the most amplified mode.
Michikoshi, Shugo, Kokubo, Eiichiro
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Super Multi-Armed and Segmented Spiral Pattern in a Reaction-Diffusion Model
IEEE Access, 2019 The super multi-armed and segmented (SMAS) spiral pattern has been observed in nature, such as sunflower inflorescence, spiral aloe, pine cone, ball cactus and Roman broccoli, which is characterized by several segmented spiral arms sharing the same ...
Jian Gao, Changgui Gu
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PITCH ANGLE OF GALACTIC SPIRAL ARMS [PDF]
The Astrophysical Journal, 2014 17 pages, 8 figures, accepted for publication in ...
Michikoshi, Shugo, Kokubo, Eiichiro
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Triggered star formation in spiral arms [PDF]
Proceedings of the International Astronomical Union, 2006 AbstractWe present preliminary results for six spiral galaxies from a sample of 25, where we have used the method developed by González & Graham (1996) to search for and analyze azimuthal color gradients across spiral arms. The six galaxies analyzed here are NGC 1703 (SBrb), NGC 3001 (SABrsbc), NGC 3059 (SBrsbc), NGC 3513 (SBrsc), NGC 4593 (RSBrsb),
E. E. Martínez-García +2 more
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