HAL will be down for maintenance from Friday, June 10 at 4pm through Monday, June 13 at 9am. More information
Skip to Main content Skip to Navigation
Journal articles

The impact of the halo spin-concentration relation on disc scaling laws

Abstract : Galaxy scaling laws, such as the Tully–Fisher, mass-size, and Fall relations, can provide extremely useful clues on our understanding of galaxy formation in a cosmological context. Some of these relations are extremely tight and well described by one single parameter (mass), despite the theoretical existence of secondary parameters such as spin and concentration, which are believed to impact these relations. In fact, the residuals of these scaling laws appear to be almost uncorrelated with each other, posing significant constraints on models where secondary parameters play an important role. Here, we show that a possible solution is that such secondary parameters are correlated amongst themselves, in a way that removes correlations in observable space. In particular, we focus on how the existence of an anti-correlation between the dark matter halo spin and its concentration, which is still debated in simulations, can weaken the correlation of the residuals of the Tully–Fisher and mass-size relations. Interestingly, in using simple analytic galaxy formation models, we find that this happens only for a relatively small portion of the parameter space that we explored, which suggests that this idea could be used to derive constraints on galaxy formation models that have yet to be explored.
Document type :
Journal articles
Complete list of metadata

Contributor : Edp Sciences Connect in order to contact the contributor
Submitted on : Thursday, December 3, 2020 - 2:48:43 AM
Last modification on : Wednesday, November 3, 2021 - 6:48:13 AM
Long-term archiving on: : Thursday, March 4, 2021 - 6:25:04 PM


Publisher files allowed on an open archive




Lorenzo Posti, Benoit Famaey, Gabriele Pezzulli, Filippo Fraternali, Rodrigo Ibata, et al.. The impact of the halo spin-concentration relation on disc scaling laws. Astronomy and Astrophysics - A&A, EDP Sciences, 2020, 644, pp.A76. ⟨10.1051/0004-6361/202038474⟩. ⟨hal-03037165⟩



Record views


Files downloads