Results 41 to 50 of about 563,926 (375)
Tracing the spiral arms in IP Pegasi [PDF]
Astronomy & Astrophysics, 2005 We report the analysis of time-resolved spectroscopy of IP Pegasi in outburst with eclipse mapping techniques to investigate the location and geometry of the observed spiral structures. We were able to obtain an improved view of the spiral structures with the aid of light curves extracted in velocity bins matching the observed range of velocities of ...
Baptista, R. +4 more
openaire +6 more sources
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
doaj +1 more source
ALMA Reveals Potential Evidence for Spiral Arms, Bars, and Rings in High-redshift Submillimeter Galaxies [PDF]
, 2018 We present subkiloparsec-scale mapping of the 870 mu m ALMA continuum emission in six luminous (LIR similar to 5 x 10(12 )L(circle dot)) submillimeter galaxies (SMGs) from the ALESS survey of the Extended Chandra Deep Field South.
J. Hodge +22 more
semanticscholar +1 more source
Hic sunt dracones: Cartography of the Milky Way spiral arms and bar resonances with Gaia Data Release 2 [PDF]
Astronomy & Astrophysics, 2019 In this paper we introduce a new method for analysing Milky Way phase-space which allows us to reveal the imprint left by the Milky Way bar and spiral arms on the stars with full phase-space data in Gaia Data Release 2.
S. Khoperskov +7 more
semanticscholar +1 more source
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
openaire +3 more sources
Thermal Infrared Imaging of MWC 758 with the Large Binocular Telescope: Planetary-driven Spiral Arms? [PDF]
Astrophysical Journal, 2019 Theoretical studies suggest that a giant planet around the young star MWC 758 could be responsible for driving the spiral features in its circumstellar disk.
K. Wagner +7 more
semanticscholar +1 more source
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
openaire +4 more sources
Spiral Arms in Disks: Planets or Gravitational Instability? [PDF]
Astrophysical Journal, 2018 Spiral arm structures seen in scattered-light observations of protoplanetary disks can potentially serve as signposts of planetary companions. They can also lend unique insights into disk masses, which are critical in setting the mass budget for planet ...
Ruobing 若冰 Dong 董 +2 more
semanticscholar +1 more source
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.
Eiichiro Kokubo, Shugo Michikoshi
openaire +4 more sources
IEEE Access, 2022 The analysis of Archimedean spiral slots using the theory of characteristic modes is presented in this article. Purely magnetic characteristic modes are used to study the behavior of a spiral slot etched in an infinite ground plane.
Pallavi Sharma, Jennifer T. Bernhard
doaj +1 more source