Spectropolarimetry in optical and near-IR for EV Lac and AD Leo: what is stellar activity's favourite colour?
Stellar activity hinders the detection of small exoplanets with the radial velocity (RV) method, because it introduces spurious signals that can drown or mimic planetary signatures. It is therefore crucial to understand and filter out activity signals, especially in light of future small planet sear...
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ftzenodo:oai:zenodo.org:4564832 2024-09-15T18:41:51+00:00 Spectropolarimetry in optical and near-IR for EV Lac and AD Leo: what is stellar activity's favourite colour? Stefano Bellotti Julien Morin Pascal Petit Gaitee Hussain 2021-02-26 https://doi.org/10.5281/zenodo.4564832 unknown Zenodo https://zenodo.org/communities/coolstars20half https://doi.org/10.5281/zenodo.4564831 https://doi.org/10.5281/zenodo.4564832 oai:zenodo.org:4564832 info:eu-repo/semantics/openAccess Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode Cool Stars on the main sequence stellar activity radial velocity spectropolarimetry info:eu-repo/semantics/conferencePoster 2021 ftzenodo https://doi.org/10.5281/zenodo.456483210.5281/zenodo.4564831 2024-07-26T13:38:14Z Stellar activity hinders the detection of small exoplanets with the radial velocity (RV) method, because it introduces spurious signals that can drown or mimic planetary signatures. It is therefore crucial to understand and filter out activity signals, especially in light of future small planet searches. We investigate ways to reduce activity jitter in RV time series using spectropolarimetric data sets in optical (ESPaDOnS@CHFT and NARVAL@TBL), and in near-infrared (nIR) with SPIRou@CHFT. We employ two approaches: 1) perform a chromatic study of typical stellar activity proxies, and 2) study a parametric selection of spectral lines to build a mask for Least-Square Deconvolution. The study is performed for EV Lac and AD Leo, two very active M dwarfs. Conference Object narval narval Zenodo |
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Cool Stars on the main sequence stellar activity radial velocity spectropolarimetry |
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Cool Stars on the main sequence stellar activity radial velocity spectropolarimetry Stefano Bellotti Julien Morin Pascal Petit Gaitee Hussain Spectropolarimetry in optical and near-IR for EV Lac and AD Leo: what is stellar activity's favourite colour? |
topic_facet |
Cool Stars on the main sequence stellar activity radial velocity spectropolarimetry |
description |
Stellar activity hinders the detection of small exoplanets with the radial velocity (RV) method, because it introduces spurious signals that can drown or mimic planetary signatures. It is therefore crucial to understand and filter out activity signals, especially in light of future small planet searches. We investigate ways to reduce activity jitter in RV time series using spectropolarimetric data sets in optical (ESPaDOnS@CHFT and NARVAL@TBL), and in near-infrared (nIR) with SPIRou@CHFT. We employ two approaches: 1) perform a chromatic study of typical stellar activity proxies, and 2) study a parametric selection of spectral lines to build a mask for Least-Square Deconvolution. The study is performed for EV Lac and AD Leo, two very active M dwarfs. |
format |
Conference Object |
author |
Stefano Bellotti Julien Morin Pascal Petit Gaitee Hussain |
author_facet |
Stefano Bellotti Julien Morin Pascal Petit Gaitee Hussain |
author_sort |
Stefano Bellotti |
title |
Spectropolarimetry in optical and near-IR for EV Lac and AD Leo: what is stellar activity's favourite colour? |
title_short |
Spectropolarimetry in optical and near-IR for EV Lac and AD Leo: what is stellar activity's favourite colour? |
title_full |
Spectropolarimetry in optical and near-IR for EV Lac and AD Leo: what is stellar activity's favourite colour? |
title_fullStr |
Spectropolarimetry in optical and near-IR for EV Lac and AD Leo: what is stellar activity's favourite colour? |
title_full_unstemmed |
Spectropolarimetry in optical and near-IR for EV Lac and AD Leo: what is stellar activity's favourite colour? |
title_sort |
spectropolarimetry in optical and near-ir for ev lac and ad leo: what is stellar activity's favourite colour? |
publisher |
Zenodo |
publishDate |
2021 |
url |
https://doi.org/10.5281/zenodo.4564832 |
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narval narval |
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narval narval |
op_relation |
https://zenodo.org/communities/coolstars20half https://doi.org/10.5281/zenodo.4564831 https://doi.org/10.5281/zenodo.4564832 oai:zenodo.org:4564832 |
op_rights |
info:eu-repo/semantics/openAccess Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode |
op_doi |
https://doi.org/10.5281/zenodo.456483210.5281/zenodo.4564831 |
_version_ |
1810486239410782208 |