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dc.contributor.authorMuirhead, Philip S.en_US
dc.contributor.authorVeyette, Mark J.en_US
dc.contributor.authorNewton, Elisabeth R.en_US
dc.contributor.authorTheissen, Christopher A.en_US
dc.contributor.authorMann, Andrew W.en_US
dc.date.accessioned2020-04-28T15:57:41Z
dc.date.available2020-04-28T15:57:41Z
dc.date.issued2020-01-15
dc.identifier.citationPhilip S Muirhead, Mark J Veyette, Elisabeth R Newton, Christopher A Theissen, Andrew W Mann. "Magnetic Inflation and Stellar Mass. V. Intensification and Saturation of M-dwarf Absorption Lines with Rossby Number." The Astronomical Journal, Volume 159, Issue 2, pp. 52. https://doi.org/10.3847/1538-3881/ab5d3d
dc.identifier.issn1538-3881
dc.identifier.urihttps://hdl.handle.net/2144/40402
dc.description.abstractIn young Sun-like stars and field M-dwarf stars, chromospheric and coronal magnetic activity indicators such as Hα, X-ray, and radio emission are known to saturate with low Rossby number (Ro lesssim 0.1), defined as the ratio of rotation period to convective turnover time. The mechanism for the saturation is unclear. In this paper, we use photospheric Ti i and Ca i absorption lines in the Y band to investigate magnetic field strength in M dwarfs for Rossby numbers between 0.01 and 1.0. The equivalent widths of the lines are magnetically enhanced by photospheric spots, a global field, or a combination of the two. The equivalent widths behave qualitatively similar to the chromospheric and coronal indicators: we see increasing equivalent widths (increasing absorption) with decreasing Ro and saturation of the equivalent widths for Ro lesssim 0.1. The majority of M dwarfs in this study are fully convective. The results add to mounting evidence that the magnetic saturation mechanism occurs at or beneath the stellar photosphere.en_US
dc.format.extentp. 52en_US
dc.language.isoen_US
dc.publisherAmerican Astronomical Societyen_US
dc.relation.ispartofThe Astronomical Journal
dc.rights© 2020 The American Astronomical Societyen_US
dc.subjectM dwarf starsen_US
dc.subjectStellar rotationen_US
dc.subjectStellar propertiesen_US
dc.subjectStellar activityen_US
dc.subjectMagnetic fieldsen_US
dc.subjectHigh resolution spectroscopyen_US
dc.subjectSpectroscopyen_US
dc.subjectInfrared astronomyen_US
dc.subjectNear infrared astronomyen_US
dc.subjectAstronomy & astrophysicsen_US
dc.subjectAstronomical and space sciencesen_US
dc.titleMagnetic inflation and stellar mass. V. Intensification and saturation of M-dwarf absorption lines with Rossby numberen_US
dc.typeArticleen_US
dc.description.versionPublished versionen_US
dc.identifier.doi10.3847/1538-3881/ab5d3d
pubs.elements-sourcecrossrefen_US
pubs.notesEmbargo: No embargoen_US
pubs.organisational-groupBoston Universityen_US
pubs.organisational-groupBoston University, College of Arts & Sciencesen_US
pubs.organisational-groupBoston University, College of Arts & Sciences, Department of Astronomyen_US
pubs.publication-statusPublished onlineen_US
dc.date.online2020-01-15
dc.identifier.orcid0000-0002-0638-8822 (Muirhead, Philip S)
dc.identifier.mycv511814


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