On the Stability of the Interstellar Wind through the Solar System

13th Annual International Astrophysics Conference: Voyager, IBEX, and the Interstellar Medium

物理学;天文学

Bertaux, Jean-Loup^1 ; Lallement, Rosine^2

LATMOS/IPSL, Université de Versailles Saint Quentin, INSU/CNRS, 11 Bd D' Alembert, Guyancourt

78200, France^1

GEPI Observatoire de Paris, CNRS, Université Paris Diderot, Place Jules Janssen, Meudon

92190, France^2

关键词: Follow up;    Helium flow;    Hydrogen flow;    IBEX-Lo;    Random values;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/577/1/012004/pdf
DOI  :  10.1088/1742-6596/577/1/012004

学科分类：天文学(综合)

来源: IOP

【 摘 要 】

As a follow-up of a recent study [1], we challenge the claim that the flow of interstellar helium through the solar system has changed substantially over the last decades. We argue that only the IBEX-Lo 2009/2010 measurements are discrepant with older consensus values. Then we show that the probability of the claimed variations of longitude and velocity are highly unlikely (1%), in view of the absence of change in latitude and absence of change in the (V, λ) relation, while random values would be expected. Finally, we report other independent studies showing the stability of Helium flow and the Hydrogen flow over the years 1996-2012, consistent with the 70's earlier determinations of the interstellar flow.