EPJ Web Conf.
Volume 152, 2017Wide-Field Variability Surveys: A 21st Century Perspective – 22nd Los Alamos Stellar Pulsation – Conference Series Meeting
|Number of page(s)||2|
|Section||Statistical challenges, new approaches and techniques|
|Published online||08 September 2017|
Between Cepheids and the Cosmos
1 Smithsonian Astrophysical Observatory, 60 Garden St., Cambridge MA 02138, USA
2 Villanova University, Department of Astronomy, Villanova, PA 19085, USA
3 University of Toronto, Dept of Astronomy Astrophysics, 60 St. George St. Toronto, ON M5S 3H4, Canada
4 Iowa State University, A313E Zaffarano, Dept. of Physics and Astronomy, Ames, IA 50010, USA
5 MIT Haystack Observatory, Westford MA, 01886, USA
6 MIT Kavli Institute for Astrophysics and Space Research, 70 Vassar St., Cambridge MA 02139, USA
Published online: 8 September 2017
The X-ray observations of three classical Cepheids produce a surprising result. At approximately the phase of maximum radius there is a sharp increase in X-ray flux above the normal “quiescent” level. The relation of this new upper atmosphere diagnostic to other phenonena above the photosphere is discussed.
© The Authors, published by EDP Sciences, 2017
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.