On the orbital velocity of isolated galaxy pairs: a test of gravity in the low acceleration regime-Reference-Cited by-同舟云学术

On the orbital velocity of isolated galaxy pairs: a test of gravity in the low acceleration regime

Published:2021-12-16 Issue:2 Volume:510 Page:2167-2172
ISSN:0035-8711
Container-title:Monthly Notices of the Royal Astronomical Society
language:en
Short-container-title:

Author:

Scarpa Riccardo¹²^ORCID,Falomo Renato³,Treves Aldo⁴⁵

Affiliation:

1. Instituto de Astrofisica de Canarias, C/O Via Lactea, s/n, E-38205 La Laguna, Tenerife, Spain

2. Departamento de Astrofsica, Universidad de La Laguna, E-38206 La Laguna, Tenerife, Spain

3. INAF - Osservatorio Astronomico di Padova, vicolo dell’Osservatorio 5, I-35122 Padova, Italy

4. Università dell’Insubria, via Valleggio 11, I-22100 Como, Italy

5. INAF - Osservatorio Astronomico di Brera, via Bianchi 46, I-23807 Merate (Lecco), Italy

Abstract

ABSTRACT The dynamics of isolated galaxy pairs represents an important tool to investigate the behaviour of gravity in the low acceleration regime. Statistical analysis of a large sample of galaxy pairs led to the noticeable discovery of a region of preferred 3-dimensional velocities centered at ∼150 and ∼100 km s−1 wide, a feature hard to justify in the context of numerical simulations of cosmological structure formation. It is shown here that such a feature is expected within the framework of the modified Newtonian dynamics, which, however, predicts it to be centered at ∼ 170 Km s−1.

Publisher

Oxford University Press (OUP)

Subject

Space and Planetary Science,Astronomy and Astrophysics

Link

https://academic.oup.com/mnras/advance-article-pdf/doi/10.1093/mnras/stab3636/41787211/stab3636.pdf

Reference39 articles.

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