A Global Correction to PPMXL Proper Motions

In this paper we notice that extragalactic sources seem to have non-zero proper motions in the PPMXL proper motion catalog. We collect a large, all-sky sample of extragalactic objects and fit their reported PPMXL proper motions to an ensemble of spherical harmonics in magnitude shells. A magnitude d...

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Veröffentlicht in:	arXiv.org 2016-02
Hauptverfasser:	Vickers, John J, Roeser, Siegfried, Grebel, Eva K
Format:	Artikel
Sprache:	eng
Schlagworte:	Photometry Physics - Astrophysics of Galaxies Proper motion Quasars Sky surveys (astronomy) Spherical harmonics Spherical shells
Online-Zugang:	Volltext
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