2021
DOI: 10.1051/0004-6361/202141044
|View full text |Cite
|
Sign up to set email alerts
|

Detection of Rossby modes with even azimuthal orders using helioseismic normal-mode coupling

Abstract: Context. Retrograde Rossby waves, measured to have significant amplitudes in the Sun, likely have notable implications for various solar phenomena. Aims. Rossby waves create small-amplitude, very-low frequency motions, on the order of the rotation rate and lower, which in turn shift the resonant frequencies and eigenfunctions of the acoustic modes of the Sun. The detection of even azimuthal orders Rossby modes using mode coupling presents additional challenges and prior work therefore only focused on odd order… Show more

Help me understand this report
View preprint versions

Search citation statements

Order By: Relevance

Paper Sections

Select...
4
1

Citation Types

1
15
0

Year Published

2022
2022
2024
2024

Publication Types

Select...
5
3

Relationship

0
8

Authors

Journals

citations
Cited by 11 publications
(16 citation statements)
references
References 31 publications
1
15
0
Order By: Relevance
“…In the solar and stellar context they are also commonly known as r modes (e.g., Papaloizou & Pringle 1978;Saio 1982). The existence of these Rossby modes on the Sun is well established (Löptien et al 2018;Hanasoge & Mandal 2019;Liang et al 2019;Proxauf et al 2020;Mandal & Hanasoge 2020;Hanson et al 2020;Hathaway & Upton 2021;Gizon et al 2021;Mandal et al 2021). They are observed for azimuthal orders in the range 3 ≤ m ≤ 15 and follow the dispersion relation of the classical sectoral (l = m) Rossby modes, where m is the azimuthal order and l is the spherical degree.…”
Section: Equatorial Rossby Modesmentioning
confidence: 99%
“…In the solar and stellar context they are also commonly known as r modes (e.g., Papaloizou & Pringle 1978;Saio 1982). The existence of these Rossby modes on the Sun is well established (Löptien et al 2018;Hanasoge & Mandal 2019;Liang et al 2019;Proxauf et al 2020;Mandal & Hanasoge 2020;Hanson et al 2020;Hathaway & Upton 2021;Gizon et al 2021;Mandal et al 2021). They are observed for azimuthal orders in the range 3 ≤ m ≤ 15 and follow the dispersion relation of the classical sectoral (l = m) Rossby modes, where m is the azimuthal order and l is the spherical degree.…”
Section: Equatorial Rossby Modesmentioning
confidence: 99%
“…The unambiguous detection of Rossby waves in the Sun by Löptien et al (2018) has led to a flurry of observational efforts to characterize the waves and to search for other classes of inertial oscillations (e.g., Alshehhi et al 2019;Hanasoge & Mandal 2019;Liang et al 2019;Hanson et al 2020;Proxauf et al 2020;Gizon et al 2021;Hathaway & Upton 2021;Mandal et al 2021). As a result, there has been a resurrection of interest in inertial waves as they might apply to the Sun and solar-like stars (e.g., Lanza et al 2019;Damiani et al 2020;Gizon et al 2020;Cai et al 2021;Bekki et al 2022).…”
Section: Introductionmentioning
confidence: 99%
“…While the derivation of the mode-coupling technique is mathematically challenging, the data analysis is simple and utilizes all the information registered by the mode. Thus far, global mode-coupling has been validated through observations of the meridional flow (Vorontsov 2011;Woodard et al 2013), differential rotation (Schad & Roth 2020;Kashyap et al 2021), global-scale convection (Woodard 2014(Woodard , 2016Hanasoge et al 2020;Mani & Hanasoge 2021) and Rossby modes (Hanasoge & Mandal 2019;Mandal & Hanasoge 2020;Mandal et al 2021). Local mode-coupling analysis in the Cartesian approximation, formulated by Woodard (2006), was validated by Hanson et al (2021) (hereafter H21) by examining the power-spectrum of supergranular waves and comparing with previous time-distance studies (Langfellner et al 2018).…”
Section: Introductionmentioning
confidence: 93%