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In this contribution we summarize our project devoted to identify activity-sensitive spectral lines in the CARMENES visible and near-infrared spectral range of M dwarfs. The aim is to contribute to solve the problem of stellar activity in RV measurements to search for exoplanets around
\nthese stars and in the determination of precise stellar parameters. To identify lines with a significant chromospheric contribution, apart from well known
\nactivity indicators (Na I D 1 D 2 He I D 3 Hα, and Ca II IRT lines, He I 10830 Å, Paγ and Paβ lines), we have used the spectral subtraction technique
\nusing our Python code iSTARMOD Labarga Montes 2020 choosing as reference the spectrum of the star with lower activity. We confirm the new
\nactivity sensitive lines by analysing the correlation with the other well known activity indicators in the same spectra and their temporal evolution in two
\nparticular active stars EV Lac (EV Lacertae, M 3.5) and YZ CMi (YZ Canis Minoris, M 4.5). They are specially active stars with strong flares and strong
\nmagnetic fields. In addition, we analyse line by line the template spectrum (co added of all the individual spectra available) of these two
\nstars applying also the spectral subtraction using in this case as reference star an inactive M dwarf star of similar spectral type to search for
\nmagnetically sensitive lines, that is lines with detectable Zeeman broadening. After this analysis on YZ CMi and EV Lac, we have found 84 and 97
\nchromospheric activity-sensitive lines and 160 and 170 magnetically-sensitive spectral lines respectively. We are now studying the impact of the
\nelimination of the activity sensitive spectral lines identified in this way on the RV determination using cross correlation functions with weighted binary
\nmasks as in Lafarga et al. (2020) and on the stellar parameters determination by spectral synthesis as in Marfil et al. (2021).
Contributions are accepted from participants that presented invited plenary session reviews, contributed plenary session talks, short "Haiku" talks and contributed posters. In addition, individual and collective contributions from (parallel) Topical Interest Rooms are welcome. If you would like to submit a typical conference proceeding, there are no formal page limits. For guidance we recommend you limit yourself to 4-8 pages for contributed talks and 10-15 pages for invited talks. Those wishing to submit a written conference proceeding are encouraged to format the document using the CS20 LaTeX template (available on https://github.com/CoolStars20/proceedings/releases/latest). All such submissions should be made as PDFs and will be reviewed for content by the SOC and we may suggest edits.
\r\n\r\nSubmission of presentation slides from speakers and full posters are also encouraged. PDF versions of these documents are the preferred format for Zenodo contributions to permit the documents to be previewed in a web browser. For maximum impact, a written contribution may be provided with presentation slides and/or a poster to provide greater context. Contributions will be checked for the proper metadata. Instructions about how to prepare your contribution are available on http://coolstars20.cfa.harvard.edu/contributions.html
\r\n", "description": "Proceedings from the Cambridge Workshop on Cool Stars, Stellar Systems, and the Sun, - Virtually Cool: hosted by Smithsonian Astrophysical Observatory Cambridge, Massachusetts from 2 \u2013 4 March 2021.", "page": "", "title": "The 20th (and a half) Cambridge Workshop on Cool Stars, Stellar Systems, and the Sun" }, "revision_id": 0, "slug": "coolstars20half", "updated": "2021-03-01T20:54:17.302650+00:00" } ], "ids": [ "3a36ebe6-61f3-417e-a308-74ef84ccb263" ] }, "id": "4564190", "pids": { "doi": { "client": "datacite", "identifier": "10.5281/zenodo.4564190", "provider": "datacite" } } }, "pids": { "doi": { "client": "datacite", "identifier": "10.5281/zenodo.4564191", "provider": "datacite" }, "oai": { "identifier": "oai:zenodo.org:4564191", "provider": "oai" } }, "revision_id": 4, "stats": { "all_versions": { "data_volume": 194163661.0, "downloads": 171, "unique_downloads": 157, "unique_views": 253, "views": 284 }, "this_version": { "data_volume": 194163661.0, "downloads": 171, "unique_downloads": 157, "unique_views": 253, "views": 284 } }, "status": "published", "updated": "2021-02-27T08:06:29.166660+00:00", "versions": { "index": 1, "is_latest": true } }