University of Hertfordshire

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From the same journal

By the same authors

The impact of unresolved magnetic spots on high precision radial velocity measurements

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The impact of unresolved magnetic spots on high precision radial velocity measurements. / Lisogorskyi, Maksym; Saikia, Susdeshna Boro; Jeffers, Sandra V.; Jones, Hugh R. A.; Morin, Julien; Mengel, Matthew; Reiners, Ansgar; Vidotto, Aline A.; Petit, Pascal.

In: Monthly Notices of the Royal Astronomical Society, 23.07.2020.

Research output: Contribution to journalArticlepeer-review

Harvard

APA

Lisogorskyi, M., Saikia, S. B., Jeffers, S. V., Jones, H. R. A., Morin, J., Mengel, M., Reiners, A., Vidotto, A. A., & Petit, P. (2020). The impact of unresolved magnetic spots on high precision radial velocity measurements. Monthly Notices of the Royal Astronomical Society, [staa2184]. https://doi.org/10.1093/mnras/staa2184

Vancouver

Author

Lisogorskyi, Maksym ; Saikia, Susdeshna Boro ; Jeffers, Sandra V. ; Jones, Hugh R. A. ; Morin, Julien ; Mengel, Matthew ; Reiners, Ansgar ; Vidotto, Aline A. ; Petit, Pascal. / The impact of unresolved magnetic spots on high precision radial velocity measurements. In: Monthly Notices of the Royal Astronomical Society. 2020.

Bibtex

@article{47ae454df37b492fbe4e198745f040da,
title = "The impact of unresolved magnetic spots on high precision radial velocity measurements",
abstract = "The Doppler method of exoplanet detection has been extremely successful, but suffers from contaminating noise from stellar activity. In this work a model of a rotating star with a magnetic field based on the geometry of the K2 star Epsilon Eridani is presented and used to estimate its effect on simulated radial velocity measurements. A number of different distributions of unresolved magnetic spots were simulated on top of the observed large-scale magnetic maps obtained from eight years of spectropolarimetric observations. The radial velocity signals due to the magnetic spots have amplitudes of up to 10 m s$^{-1}$, high enough to prevent the detection of planets under 20 Earth masses in temperate zones of solar type stars. We show that the radial velocity depends heavily on spot distribution. Our results emphasize that understanding stellar magnetic activity and spot distribution is crucial for detection of Earth analogues. ",
keywords = "astro-ph.EP, astro-ph.SR",
author = "Maksym Lisogorskyi and Saikia, {Susdeshna Boro} and Jeffers, {Sandra V.} and Jones, {Hugh R. A.} and Julien Morin and Matthew Mengel and Ansgar Reiners and Vidotto, {Aline A.} and Pascal Petit",
note = "This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society {\textcopyright}: 2020 The Author(s). Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.",
year = "2020",
month = jul,
day = "23",
doi = "10.1093/mnras/staa2184",
language = "English",
journal = "Monthly Notices of the Royal Astronomical Society",
issn = "0035-8711",
publisher = "Oxford University Press",

}

RIS

TY - JOUR

T1 - The impact of unresolved magnetic spots on high precision radial velocity measurements

AU - Lisogorskyi, Maksym

AU - Saikia, Susdeshna Boro

AU - Jeffers, Sandra V.

AU - Jones, Hugh R. A.

AU - Morin, Julien

AU - Mengel, Matthew

AU - Reiners, Ansgar

AU - Vidotto, Aline A.

AU - Petit, Pascal

N1 - This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society ©: 2020 The Author(s). Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.

PY - 2020/7/23

Y1 - 2020/7/23

N2 - The Doppler method of exoplanet detection has been extremely successful, but suffers from contaminating noise from stellar activity. In this work a model of a rotating star with a magnetic field based on the geometry of the K2 star Epsilon Eridani is presented and used to estimate its effect on simulated radial velocity measurements. A number of different distributions of unresolved magnetic spots were simulated on top of the observed large-scale magnetic maps obtained from eight years of spectropolarimetric observations. The radial velocity signals due to the magnetic spots have amplitudes of up to 10 m s$^{-1}$, high enough to prevent the detection of planets under 20 Earth masses in temperate zones of solar type stars. We show that the radial velocity depends heavily on spot distribution. Our results emphasize that understanding stellar magnetic activity and spot distribution is crucial for detection of Earth analogues.

AB - The Doppler method of exoplanet detection has been extremely successful, but suffers from contaminating noise from stellar activity. In this work a model of a rotating star with a magnetic field based on the geometry of the K2 star Epsilon Eridani is presented and used to estimate its effect on simulated radial velocity measurements. A number of different distributions of unresolved magnetic spots were simulated on top of the observed large-scale magnetic maps obtained from eight years of spectropolarimetric observations. The radial velocity signals due to the magnetic spots have amplitudes of up to 10 m s$^{-1}$, high enough to prevent the detection of planets under 20 Earth masses in temperate zones of solar type stars. We show that the radial velocity depends heavily on spot distribution. Our results emphasize that understanding stellar magnetic activity and spot distribution is crucial for detection of Earth analogues.

KW - astro-ph.EP

KW - astro-ph.SR

U2 - 10.1093/mnras/staa2184

DO - 10.1093/mnras/staa2184

M3 - Article

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

SN - 0035-8711

M1 - staa2184

ER -