Redshift measurement through star formation

Lindholmer, Mikkel O.; Pimbblet, Kevin A.

Abstract

© ESO 2019. In this work we use the property that, on average, star formation rate increases with redshift for objects with the same mass - the so called galaxy main sequence - to measure the redshift of galaxy clusters. We use the fact that the general galaxy population forms both a quenched and a star-forming sequence, and we locate these ridges in the SFR-M⋆ plane with galaxies taken from the Sloan Digital Sky Survey in discrete redshift bins. We fitted the evolution of the galaxy main sequence with redshift using a new method and then subsequently apply our method to a suite of X-ray selected galaxy clusters in an attempt to create a new distance measurement to clusters based on their galaxy main sequence. We demonstrate that although it is possible in several galaxy clusters to measure the main sequences, the derived distance and redshift from our galaxy main sequence fitting technique has an accuracy of σz  =  ±0.017 ⋅  (z  +  1) and is only accurate up to z  ≈  0.2.

Citation

Lindholmer, M. O., & Pimbblet, K. A. (2019). Redshift measurement through star formation. Astronomy and Astrophysics, 629, Article A7. https://doi.org/10.1051/0004-6361/201833046

• Journal Article Type: Article
• Acceptance Date: Dec 15, 2018
• Publication Date: Aug 23, 2019
• Deposit Date: Nov 21, 2019
• Publicly Available Date: Nov 22, 2019
• Journal: Astronomy and Astrophysics
• Print ISSN: 0004-6361
• Publisher: EDP Sciences
• Peer Reviewed: Peer Reviewed
• Volume: 629
• Article Number: A7
• DOI: https://doi.org/10.1051/0004-6361/201833046
• Keywords: methods: observational; galaxies: clusters: general
• Public URL: https://hull-repository.worktribe.com/output/2720445
• Contract Date: Nov 21, 2019