Search for star cluster age gradients across spiral arms of three LEGUS disc galaxies [PDF]
, 2018 One of the main theories for explaining the formation of spiral arms in galaxies is the stationary density wave theory. This theory predicts the existence of an age gradient across the arms. We use the stellar cluster catalogues of the galaxies NGC 1566,
F. Shabani +25 more
semanticscholar +2 more sources
Direct images and spectroscopy of a giant protoplanet driving spiral arms in MWC 758 [PDF]
Nature Astronomy, 2023 A very cold and/or extremely reddened protoplanet in the disk around MWC 758 has been detected in images and with spectroscopy. MWC 758c is responsible for driving the disk’s spiral arm patterns.
K. Wagner +25 more
semanticscholar +1 more source
Galaxies decomposition with spiral arms – I: 29 galaxies from S4G [PDF]
Monthly notices of the Royal Astronomical Society, 2023 Spiral structure can occupy a significant part of the galaxy, but properly accounting for it in photometric decomposition is rarely done. This may lead to significant errors in the parameters determined.
I. Chugunov +9 more
semanticscholar +1 more source
The EDGE-CALIFA survey: The role of spiral arms and bars in driving central molecular gas concentrations [PDF]
Astronomy & Astrophysics, 2022 Shocks and torques produced by non-axisymmetric structures such as spiral arms and bars may transport gas to galaxy central regions. We test this hypothesis by studying the dependence of concentration of CO luminosity ($C_{CO}$), molecular gas ($C_{mol}$)
Sijie Yu +11 more
semanticscholar +1 more source
Spiral Arms and a Massive Dust Disk with Non-Keplerian Kinematics: Possible Evidence for Gravitational Instability in the Disk of Elias 2–27 [PDF]
Astrophysical Journal, 2021 To determine the origin of the spiral structure observed in the dust continuum emission of Elias 2–27 we analyze multiwavelength continuum ALMA data with a resolution of ∼0.″2 (∼23 au) at 0.89, 1.3, and 3.3 mm.
T. Paneque-Carreño +18 more
semanticscholar +1 more source
The chemical signature of the Galactic spiral arms revealed by Gaia DR3 [PDF]
Astronomy & Astrophysics, 2022 Taking advantage of the recent Gaia Data Release 3 (DR3), we map chemical inhomogeneities in the Milky Way's disc out to a distance of $\sim$ 4 kpc from the Sun, using different samples of bright giant stars.
E. Poggio +10 more
semanticscholar +1 more source
Tracing the Milky Way warp and spiral arms with classical Cepheids [PDF]
Astronomy & Astrophysics, 2022 Mapping the Galactic spiral structure is a difficult task since the Sun is located in the Galactic plane and because of dust extinction. For these reasons, molecular masers in radio wavelengths have been used with great success to trace the Milky Way ...
B. Lemasle +12 more
semanticscholar +1 more source
The Effect of Environment on Galaxy Spiral Arms, Bars, Concentration, and Quenching [PDF]
Astronomical Journal, 2022 For a sample of 4378 nearby spiral and S0 galaxies, Yu & Ho used Fourier analysis of Sloan Digital Sky Survey images to show that the strengths of the spiral arms and the pitch angles of the arms are inversely correlated with central concentration.
Beverly J. Smith, M. Giroux, C. Struck
semanticscholar +1 more source
External or internal companion exciting the spiral arms in CQ Tau? [PDF]
Monthly notices of the Royal Astronomical Society, 2022 We present new high-contrast images in near-infrared wavelengths (λc = 1.04, 1.24, 1.62, 2.18 and 3.78μm) of the young variable star CQ Tau, aiming to constrain the presence of companions in the protoplanetary disc.
I. Hammond +11 more
semanticscholar +1 more source
Strong spiral arms drive secular growth of pseudo bulges in disk galaxies [PDF]
Astronomy & Astrophysics, 2022 Spiral-driven instabilities may drive gas inflow to enhance central star formation in disk galaxies. We investigate this hypothesis using the Sloan Digital Sky Survey (SDSS) in a sample of 2779 nearby unbarred star-forming main-sequence spiral galaxies ...
Sijie Yu +6 more
semanticscholar +1 more source