Colour jumps across the spiral arms of Hubble Ultra Deep Field galaxies

0583933 - ASÚ 2024 RIV US eng J - Journal Article
Martínez-García, E.E. … Total 3 authors
Colour jumps across the spiral arms of Hubble Ultra Deep Field galaxies.
Monthly Notices of the Royal Astronomical Society. Roč. 524, č. 1 (2023), s. 18-31. ISSN 0035-8711. E-ISSN 1365-2966
Research Infrastructure: EU-ARC.CZ III - 90259
Keywords : general galaxies * high-redshift * kinematics and dynamics
OECD category: Astronomy (including astrophysics,space science)
Impact factor: 4.8, year: 2022
Method of publishing: Limited access
https://doi.org/10.1093/mnras/stad1805

We have measured, at various wavelengths, the spiral arm pitch angles of a sample of distant spiral galaxies from the Hubble Space Telescope eXtreme Deep Field (XDF). According to density wave (DW) theory, we should detect colour jumps from red-to-blue across the spiral arms. Colour jumps are a consequence of large-scale shocks, which also generate the classic blue-to-red age/colour gradients, and have only been detected until now in nearby spiral galaxies. Our results indicate that colour jumps and gradients have been occurring in distant galaxies for at least the last 8 Gyr, in agreement with DW theory.
Permanent Link: https://hdl.handle.net/11104/0351915