English
 
Help Privacy Policy Disclaimer
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
  The effect of our local motion on the Sandage–Loeb test of the cosmic expansion

Inoue, T., Komatsu, E., Aoki, W., Chiba, T., Misawa, T., & Usuda, T. (2019). The effect of our local motion on the Sandage–Loeb test of the cosmic expansion. Publications of the Astronomical Society of Japan, 72(1): L1. doi:10.1093/pasj/psz131.

Item is

Basic

show hide
Genre: Journal Article

Files

show Files
hide Files
:
The effect of our local motion on the Sandage–Loeb test of the cosmic expansion.pdf (Any fulltext), 2MB
 
File Permalink:
-
Name:
The effect of our local motion on the Sandage–Loeb test of the cosmic expansion.pdf
Description:
-
OA-Status:
Visibility:
Private
MIME-Type / Checksum:
application/pdf
Technical Metadata:
Copyright Date:
-
Copyright Info:
-
License:
-

Locators

show

Creators

show
hide
 Creators:
Inoue, Takuya1, Author           
Komatsu, Eiichiro1, Author           
Aoki, Wako, Author
Chiba, Takeshi, Author
Misawa, Toru, Author
Usuda, Tomonori, Author
Affiliations:
1Physical Cosmology, MPI for Astrophysics, Max Planck Society, ou_2205644              

Content

show
hide
Free keywords: -
 Abstract: Redshifts of an astronomical body measured atmultiple epochs (e.g., separated by 10 yr) are different due to the cosmic expansion. This so-called Sandage–Loeb test offers a direct measurement of the expansion rate of the Universe. However, acceleration in the motion of the Solar System with respect to the cosmic microwave background also changes redshifts measured at multiple epochs. If not accounted for, it yields a biased cosmological inference. To address this,we calculate the acceleration of the Solar System with respect to the Local Group of galaxies to quantify the change in themeasured redshift due to local motion. Our study is motivated by the recent determination of the mass of the Large Magellanic Cloud (LMC), which indicates a significant fraction of the MilkyWay mass. We find that the acceleration towards the Galactic Center dominates, which gives a redshift change of 7 cms−1 in 10 yr, while the accelerations due to the LMC and M31 cannot be ignored, depending on lines of sight. We create all-sky maps of the expected change in redshift and the corresponding uncertainty, which can be used to correct for this effect.

Details

show
hide
Language(s): eng - English
 Dates: 2019-12-23
 Publication Status: Published online
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1093/pasj/psz131
 Degree: -

Event

show

Legal Case

show

Project information

show

Source 1

show
hide
Title: Publications of the Astronomical Society of Japan
  Abbreviation : Publ. Astron. Soc. Jpn.
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: -
Pages: 19 Volume / Issue: 72 (1) Sequence Number: L1 Start / End Page: - Identifier: ISSN: 0004-6264
ISSN: 2053-051X