Local Interstellar Matter: The Apex Cloud

Details Local Interstellar Matter: The Apex Cloud Local Interstellar Matter: The Apex Cloud

2003-02-03

arxiv.org/abs/astro-ph/0302037v3

Astrophys.J. 593 (2003) 868-873

Astronomy and Astrophysics

Astrophysics

Scientific paper

10.1086/376684

Several nearby individual low column density interstellar cloudlets have been identified based on kinematical features evident in high-resolution CaII observations near the Sun. One of these cloudlets, the ``Aquila-Ophiuchus'' cloud, is within 5 pc of the Sun and located in the solar apex direction. The velocity vector of this Apex Cloud is reevaluated and components at this velocity are found towards 17 stars with distances 1--60 pc, and located primarily in the galactic center hemisphere. The Apex Cloud is the most likely candidate for the ``next'' interstellar cloud to be encountered by the Sun.

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