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Activity cycles in stars
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Hathaway, David H. |
| Copyright Year | 2009 |
| Description | Starspots and stellar activity can be detected in other stars using high precision photometric and spectrometric measurements. These observations have provided some surprises (starspots at the poles - sunspots are rarely seen poleward of 40 degrees) but more importantly they reveal behaviors that constrain our models of solar-stellar magnetic dynamos. The observations reveal variations in cycle characteristics that depend upon the stellar structure, convection zone dynamics, and rotation rate. In general, the more rapidly rotating stars are more active. However, for stars like the Sun, some are found to be inactive while nearly identical stars are found to be very active indicating that periods like the Sun's Maunder Minimum (an inactive period from 1645 to 1715) are characteristic of Sun-like stars. |
| File Size | 9118 |
| Page Count | 1 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20090019098 |
| Archival Resource Key | ark:/13960/t3324xc6r |
| Language | English |
| Publisher Date | 2009-01-06 |
| Access Restriction | Open |
| Subject Keyword | Astrophysics Stellar Convection Astronomical Photometry Astronomical Spectroscopy Stellar Rotation Magnetic Fields Stellar Activity Stellar Structure Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Presentation |
