Home News About Us Contact Contributors Disclaimer Privacy Policy Help FAQ

Home
Search
Quick Search
Advanced
Fulltext
Browse
Collections
Persons
My eDoc
Session History
Login
Name:
Password:
Documentation
Help
Support Wiki
Direct access to
document ID:


          Institute: MPI für Astronomie     Collection: Publikationen_mpia     Display Documents



ID: 731812.0, MPI für Astronomie / Publikationen_mpia
The transverse velocity of the Andromeda system, derived from the M31 satellite population
Authors:Salomon, J. -. B.; Ibata, R. A.; Famaey, B.; Martin, N. F.; Lewis, G. F.
Date of Publication (YYYY-MM-DD):2016
Title of Journal:Monthly Notices of the Royal Astronomical Society
Volume:456
Issue / Number:4
Start Page:4432
End Page:4440
Audience:Not Specified
Abstract / Description:We present a dynamical measurement of the tangential motion of the Andromeda system, the ensemble consisting of the Andromeda galaxy (M31) and its satellites. The system is modelled as a structure with cosmologically motivated velocity dispersion and density profiles, and we show that our method works well when tested using the most massive substructures in high-resolution Λ cold dark matter (ΛCDM) simulations. Applied to the sample of 40 currently known galaxies of this system, we find a value for the velocity along the East and North directions of vEast = -111.5 ± 70.2 km s-1 and vNorth = 99.4 ± 60.0 km s-1, implying a transverse velocity significantly higher than previous estimates of the proper motion of M31 itself. This result has significant implications on estimates of the mass of the Local Group, as well as on its past and future history.
Free Keywords:galaxies: dwarf; Local Group
External Publication Status:published
Document Type:Article
Communicated by:N. N.
Affiliations:MPI für Astronomie
Identifiers:ISSN:0035-8711 %R 10.1093/mnras/stv2865
URL:http://cdsads.u-strasbg.fr/abs/2016MNRAS.456.4432S
The scope and number of records on eDoc is subject to the collection policies defined by each institute - see "info" button in the collection browse view.