Skip to main content Accessibility help
×
Home
Hostname: page-component-564cf476b6-z65vl Total loading time: 0.213 Render date: 2021-06-18T23:50:37.747Z Has data issue: true Feature Flags: { "shouldUseShareProductTool": true, "shouldUseHypothesis": true, "isUnsiloEnabled": true, "metricsAbstractViews": false, "figures": true, "newCiteModal": false, "newCitedByModal": true, "newEcommerce": true }

Chromospheric Surface Structures on EI Eridani and HD 199178

Published online by Cambridge University Press:  12 April 2016

James E. Neff
Affiliation:
Laboratory for Astronomy and Solar Physics, Code 681, NASA Goddard Space Flight Center, Greenbelt, MD 20771
Rights & Permissions[Opens in a new window]

Extract

Several groups at this meeting are presenting maps of the spatial distribution of either brightness or effective temperature in the photospheres of rapidly-rotating, late-type stars. It is generally believed that structure seen in these maps traces the magnetic topology, in analogy with the Sun. We expect the structure of the outer atmospheres (i.e., chromosphere and corona) of these stars to be even more directly tied to the magnetic topology; the magnetic structure is three-dimensional. In order to probe the radial dimension of stellar atmospheres, we need to combine maps of the spatial distribution of emission from chromospheres and coronae with these detailed photospheric maps.

Along with collaborators at Armagh, Catania, Boulder, Paris, Helsinki, and Stony Brook, I have been obtaining high-dispersion ultraviolet spectra of several rapidly-rotating, late-type stars using the IUE spacecraft. I discuss results for two stars, El Eridani and HD 199178, for which photospheric maps are presented elsewhere at this conference.

Type
Part IV Stellar activity
Copyright
Copyright © Springer-Verlag 1991

References

Huenemoerder, D.P.: 1986, Astron. J., 92, 673 CrossRefGoogle Scholar
Jetsu, L., Huovelin, J., Tuominen, I., Vilhu, O., Bopp, B.W., Piirola, V.: 1990, Astron. Astrophys. 236, 423 Google Scholar
Neff, J.E.: 1990, Mem. Astron. Soc. Italy, special volume, ed. Pettersen, B.R., in pressGoogle Scholar
Neff, J.E., Brown, A., Linsky, J.L.: 1989, in Solar and Stellar Flares, (Poster Volume), eds. Haisch, B.M., Rodonò, M., Publ. Catania Astrophys. Obs., p. 1ll Google Scholar
Neff, J.E., Vilhu, O., Walter, F.M.: 1988, in A Decade of UV Astronomy With the IUE Satellite, ESA SP-281, p. 291 Google Scholar
Neff, J.E., Vilhu, O., Walter, F.M.: 1990, Astron. J., submittedGoogle Scholar
You have Access

Send article to Kindle

To send this article to your Kindle, first ensure no-reply@cambridge.org is added to your Approved Personal Document E-mail List under your Personal Document Settings on the Manage Your Content and Devices page of your Amazon account. Then enter the ‘name’ part of your Kindle email address below. Find out more about sending to your Kindle. Find out more about sending to your Kindle.

Note you can select to send to either the @free.kindle.com or @kindle.com variations. ‘@free.kindle.com’ emails are free but can only be sent to your device when it is connected to wi-fi. ‘@kindle.com’ emails can be delivered even when you are not connected to wi-fi, but note that service fees apply.

Find out more about the Kindle Personal Document Service.

Chromospheric Surface Structures on EI Eridani and HD 199178
Available formats
×

Send article to Dropbox

To send this article to your Dropbox account, please select one or more formats and confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your <service> account. Find out more about sending content to Dropbox.

Chromospheric Surface Structures on EI Eridani and HD 199178
Available formats
×

Send article to Google Drive

To send this article to your Google Drive account, please select one or more formats and confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your <service> account. Find out more about sending content to Google Drive.

Chromospheric Surface Structures on EI Eridani and HD 199178
Available formats
×
×

Reply to: Submit a response

Please enter your response.

Your details

Please enter a valid email address.

Conflicting interests

Do you have any conflicting interests? *