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Mauas, P.J.D.; Falchi, A.; Pasquini, L.; Pallavicini, R. "Chromospheric models of dwarf M stars" (1997) Astronomy and Astrophysics. 326(1):249-256
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Abstract:

We present chromospheric models for two dM stars considered as "basal" stars due to the low level of chromospheric activity, and compare them with the model for a very active, flare star obtained in a previous paper. These models are not based on a single spectral feature, but on the continuum in a broad wavelength range (3500 - 9000 Å), on many line profiles corresponding to three different atoms (H, Ca, Na), and on the Mg II h and k flux. We show that a marked chromosphere is present even for stars with the lowest levels of activity, and that the active stars have both a chromospheric temperature rise at larger column mass and a higher chromospheric temperature. These characteristics are responsible for the presence of the Balmer lines in emission in the dMe stars. We also show that the additional energy required to transform a dM star into an active star must be deposited in the high chromosphere, just below the transition region.

Registro:

Documento: Artículo
Título:Chromospheric models of dwarf M stars
Autor:Mauas, P.J.D.; Falchi, A.; Pasquini, L.; Pallavicini, R.
Filiación:Inst. Astronomia Fis. E., CC 67, Suc. 28, 1428 Buenos Aires, R, Argentina
Osservatorio Astrofisico di Arcetri, Largo E. Fermi 5, I-50155 Firenze, Italy
European S. Observatory, La Silla, Casilla 19001, Santiago 19, Chile
Osservatorio Astronomico, Palazzo dei Normanni, I-90134 Palermo, Italy
Palabras clave:Stars: Atmospheres; Stars: Chromosphere; Stars: Late-type
Año:1997
Volumen:326
Número:1
Página de inicio:249
Página de fin:256
Título revista:Astronomy and Astrophysics
Título revista abreviado:Astron. Astrophys.
ISSN:00046361
CODEN:AAEJA
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00046361_v326_n1_p249_Mauas

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Citas:

---------- APA ----------
Mauas, P.J.D., Falchi, A., Pasquini, L. & Pallavicini, R. (1997) . Chromospheric models of dwarf M stars. Astronomy and Astrophysics, 326(1), 249-256.
Recuperado de https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00046361_v326_n1_p249_Mauas [ ]
---------- CHICAGO ----------
Mauas, P.J.D., Falchi, A., Pasquini, L., Pallavicini, R. "Chromospheric models of dwarf M stars" . Astronomy and Astrophysics 326, no. 1 (1997) : 249-256.
Recuperado de https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00046361_v326_n1_p249_Mauas [ ]
---------- MLA ----------
Mauas, P.J.D., Falchi, A., Pasquini, L., Pallavicini, R. "Chromospheric models of dwarf M stars" . Astronomy and Astrophysics, vol. 326, no. 1, 1997, pp. 249-256.
Recuperado de https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00046361_v326_n1_p249_Mauas [ ]
---------- VANCOUVER ----------
Mauas, P.J.D., Falchi, A., Pasquini, L., Pallavicini, R. Chromospheric models of dwarf M stars. Astron. Astrophys. 1997;326(1):249-256.
Available from: https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00046361_v326_n1_p249_Mauas [ ]