The behavior of the pitch angle of spiral arms depending on optical wavelength

Abstract

Based on integral field spectroscopy data from the CALIFA survey, we investigate the possible dependence of spiral arm pitch angle with optical wavelength. For three of the five studied objects, the pitch angle gradually increases at longer wavelengths. This is not the case for two objects where the pitch angle remains constant. This result is confirmed by the analysis of SDSS data. We discuss the possible physical mechanisms to explain this phenomenon, as well as the implications of the results.

accepted for publication in ApJ Letters

References in corpus (7)

• CALIFA, the Calar Alto Legacy Integral Field Area survey. II. First public data release
• On the origin of rR_1 ring structures in barred galaxies
• Discovery of a relationship between spiral arm morphology and supermassive black hole mass in disk galaxies
• Constraining dark matter halo profiles and galaxy formation models using spiral arm morphology. I. Method outline
• On the galaxy spiral arms' nature as revealed by rotation frequencies
• The coalescence of invariant manifolds and the spiral structure of barred galaxies
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• Strong spiral arms drive secular growth of pseudo bulges in disk galaxies
• Investigating the Origins of Spiral Structure in Disk Galaxies through a Multiwavelength Study
• Redshifting galaxies from DESI to JWST CEERS: Correction of biases and uncertainties in quantifying morphology
• Colour jumps across the spiral arms of Hubble Ultra Deep Field galaxies