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Redshift measurement through star formation

Lindholmer, Mikkel O.; Pimbblet, Kevin A.


Mikkel O. Lindholmer


© 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.


Lindholmer, M. O., & Pimbblet, K. A. (2019). Redshift measurement through star formation. Astronomy and Astrophysics, 629,

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
Electronic ISSN 1432-0746
Publisher EDP Sciences
Peer Reviewed Peer Reviewed
Volume 629
Article Number A7
Keywords methods: observational; galaxies: clusters: general
Public URL


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