New Eyes to See Inside the Sun and Stars 1998
DOI: 10.1007/978-94-011-4982-2_64
|View full text |Cite
|
Sign up to set email alerts
|

The Acoustic Cut-Off Frequency of roAp Stars

Help me understand this report

Search citation statements

Order By: Relevance

Paper Sections

Select...
2
1
1
1

Citation Types

2
8
0

Year Published

2003
2003
2009
2009

Publication Types

Select...
6
4

Relationship

0
10

Authors

Journals

citations
Cited by 24 publications
(10 citation statements)
references
References 3 publications
2
8
0
Order By: Relevance
“…This star has one of the shortest pulsation periods, 5.7 min, which is close to the acoustic cut-off frequency calculated for HD 134214 by Audard et al (1998). The centre-of-gravity and bisector amplitude-phase diagrams are shown for HD 134214 in …”
Section: Hd 134214supporting
confidence: 79%
“…This star has one of the shortest pulsation periods, 5.7 min, which is close to the acoustic cut-off frequency calculated for HD 134214 by Audard et al (1998). The centre-of-gravity and bisector amplitude-phase diagrams are shown for HD 134214 in …”
Section: Hd 134214supporting
confidence: 79%
“…This deficiency can also influence the reflection of the waves near the surface. Some previous studies have discussed this problem (Shibahashi & Saio 1985; Audard et al 1998; Gautschy et al 1998) and stressed the fact that a possible way to increase the critical cut‐off frequency of the models, and thus help reflecting the modes, is to have a steeper temperature gradient in the atmosphere. The surface chemical inhomogeneities (Shibahashi & Saio 1985; Gautschy et al 1998), and the possible suppression of convection by the magnetic field (Balmforth et al 2001), both contribute to steepen the temperature gradient in the surface layers of the models.…”
Section: Uncertainties In the Modelsmentioning
confidence: 99%
“…The frequencies in many roAp stars exceed the acoustic cut‐off frequency of models with standard stellar atmospheres, thus also indicating abnormal atmospheric structure (see e.g. Audard et al 1998; Cunha 2006). The magnetic field directly alters the eigenfrequencies and eigenfunctions, it indirectly contributes to driving the pulsations by suppression of convection, and its geometry contributes to, or defines, the mode selection.…”
Section: Introductionmentioning
confidence: 99%