The spectra of late type dwarfs and sub-dwarfs in the near ultraviolet. II - Limits to variability in MgII emission from IUE spectrophotometry

Bibcode
1983A&AS...52..135C
Crivellari, L.; Franco, M. L.; Molaro, P.; Vladilo, G.; Beckman, J. E.
Referencia bibliográfica

Astronomy and Astrophysics Supplement Series (ISSN 0365-0138), vol. 52, April 1983, p. 135-142. Research supported by the Consiglio Nazionale Delle Ricerche and Science and Engineering Research Council.

Fecha de publicación:
4
1983
Número de autores
5
Número de autores del IAC
0
Número de citas
14
Número de citas referidas
13
Descripción
The chromospheric h and k emission cores of the G dwarfs and subdwarfs Beta Hyi (14), Zeta Tuc (5), Delta Pav (5), and Tau Cet (5) have been monitored over a period of four years using the IUE satellite long wavelength camera. A detailed statistical examination of the data has shown that no variation in h and k fluxes of less than 15 percent could have been detected by means of this technique. This limit applies, even after removing the effects of saturation, variable gain, and scattered light between echelle orders, for any astrophysical use of comparable IUE data. No flux excursions larger than this value were detected in any of the objects presently considered.
Tipo
Con árbitro
Estrellas G

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