Starspot-induced radial velocity jitter during a stellar cycle

Publikation: Bidrag til tidsskrift › Konferenceartikel › Forskning › fagfællebedømt

Standard

Starspot-induced radial velocity jitter during a stellar cycle. / Korhonen, Heidi Helena; Andersen, Jan Marie; Järvinen, Silva.

I: Proceedings of the International Astronomical Union, Bind 8, Nr. S293, 2012, s. 382-384.

Publikation: Bidrag til tidsskrift › Konferenceartikel › Forskning › fagfællebedømt

Harvard

Korhonen, HH, Andersen, JM & Järvinen, S 2012, 'Starspot-induced radial velocity jitter during a stellar cycle', Proceedings of the International Astronomical Union, bind 8, nr. S293, s. 382-384. https://doi.org/10.1017/S1743921313013203

APA

Korhonen, H. H., Andersen, J. M., & Järvinen, S. (2012). Starspot-induced radial velocity jitter during a stellar cycle. Proceedings of the International Astronomical Union, 8(S293), 382-384. https://doi.org/10.1017/S1743921313013203

Vancouver

Korhonen HH, Andersen JM, Järvinen S. Starspot-induced radial velocity jitter during a stellar cycle. Proceedings of the International Astronomical Union. 2012;8(S293):382-384. https://doi.org/10.1017/S1743921313013203

Author

Korhonen, Heidi Helena ; Andersen, Jan Marie ; Järvinen, Silva. / Starspot-induced radial velocity jitter during a stellar cycle. I: Proceedings of the International Astronomical Union. 2012 ; Bind 8, Nr. S293. s. 382-384.

Bibtex

@inproceedings{3ea0be324920414a80c54a114c456e23,
title = "Starspot-induced radial velocity jitter during a stellar cycle",
abstract = "Late-type stars exhibit cool regions on their surface, the stellar equivalent of sunspots. These dark starspots can also mimic the radial velocity variations caused by orbiting planets, making it at times difficult to distinguish between planets and activity signatures. The amount of spots on the Sun and other cool stars changes cyclically during an activity cycle, which has length varying from about a year to longer than the solar 11 years. In this work we investigate the influence of varying amount of starspots on the sparsely sampled radial velocity observations - which are the norm in the radial velocity studies searching for exoplanets on wide orbits. We study two simulated cases: one with a random spot configuration, and one where the spot occurrence is concentrated. In addition we use Doppler images of young solar analogue V889 Her as a high activity case.",
keywords = "atmospheres, planetary systems, rotation, spots, stars: activity",
author = "Korhonen, {Heidi Helena} and Andersen, {Jan Marie} and Silva J{\"a}rvinen",
year = "2012",
doi = "10.1017/S1743921313013203",
language = "English",
volume = "8",
pages = "382--384",
journal = "Proceedings of the International Astronomical Union",
issn = "1743-9213",
publisher = "Cambridge University Press",
number = "S293",
note = "null ; Conference date: 27-08-2012 Through 31-08-2012",

}

RIS

TY - GEN

T1 - Starspot-induced radial velocity jitter during a stellar cycle

AU - Korhonen, Heidi Helena

AU - Andersen, Jan Marie

AU - Järvinen, Silva

N1 - Conference code: 293

PY - 2012

Y1 - 2012

N2 - Late-type stars exhibit cool regions on their surface, the stellar equivalent of sunspots. These dark starspots can also mimic the radial velocity variations caused by orbiting planets, making it at times difficult to distinguish between planets and activity signatures. The amount of spots on the Sun and other cool stars changes cyclically during an activity cycle, which has length varying from about a year to longer than the solar 11 years. In this work we investigate the influence of varying amount of starspots on the sparsely sampled radial velocity observations - which are the norm in the radial velocity studies searching for exoplanets on wide orbits. We study two simulated cases: one with a random spot configuration, and one where the spot occurrence is concentrated. In addition we use Doppler images of young solar analogue V889 Her as a high activity case.

AB - Late-type stars exhibit cool regions on their surface, the stellar equivalent of sunspots. These dark starspots can also mimic the radial velocity variations caused by orbiting planets, making it at times difficult to distinguish between planets and activity signatures. The amount of spots on the Sun and other cool stars changes cyclically during an activity cycle, which has length varying from about a year to longer than the solar 11 years. In this work we investigate the influence of varying amount of starspots on the sparsely sampled radial velocity observations - which are the norm in the radial velocity studies searching for exoplanets on wide orbits. We study two simulated cases: one with a random spot configuration, and one where the spot occurrence is concentrated. In addition we use Doppler images of young solar analogue V889 Her as a high activity case.

KW - atmospheres

KW - planetary systems

KW - rotation

KW - spots

KW - stars: activity

UR - http://www.scopus.com/inward/record.url?scp=84899878968&partnerID=8YFLogxK

U2 - 10.1017/S1743921313013203

DO - 10.1017/S1743921313013203

M3 - Conference article

AN - SCOPUS:84899878968

VL - 8

SP - 382

EP - 384

JO - Proceedings of the International Astronomical Union

JF - Proceedings of the International Astronomical Union

SN - 1743-9213

IS - S293

Y2 - 27 August 2012 through 31 August 2012

ER -

ID: 183471846