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The impact of chromospheric activity on observed initial mass functions
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dc.contributor.author | Stassun, Keivan G. | |
dc.contributor.author | Scholz, Aleks | |
dc.contributor.author | Dupuy, Trent J. | |
dc.contributor.author | Kratter, Kaitlin M. | |
dc.date.accessioned | 2014-12-02T17:31:04Z | |
dc.date.available | 2014-12-02T17:31:04Z | |
dc.date.issued | 2014-12-01 | |
dc.identifier | 158823195 | |
dc.identifier | f8d8fcdb-767e-4444-971e-9c068e39bd74 | |
dc.identifier | 84911407387 | |
dc.identifier | 000344878900048 | |
dc.identifier.citation | Stassun , K G , Scholz , A , Dupuy , T J & Kratter , K M 2014 , ' The impact of chromospheric activity on observed initial mass functions ' , Astrophysical Journal , vol. 796 , no. 2 , 119 . https://doi.org/10.1088/0004-637X/796/2/119 | en |
dc.identifier.issn | 0004-637X | |
dc.identifier.other | BibCode: 2014ApJ...796..119S | |
dc.identifier.other | ArXiv: http://arxiv.org/abs/1410.4971v2 | |
dc.identifier.uri | https://hdl.handle.net/10023/5857 | |
dc.description | K.G.S. acknowledges NSF grants PAARE AST-0849736 and AAG AST-1109612. The work of A.S. for this paper has been supported by the Science Foundation Ireland through the grant 10/RFP/AST278. | en |
dc.description.abstract | Using recently established empirical calibrations for the impact of chromospheric activity on the radii, effective temperatures, and estimated masses of active low-mass stars and brown dwarfs, we reassess the shape of the initial mass function (IMF) across the stellar/substellar boundary in the Upper Sco star-forming region (age ~ 5-10 Myr). We adjust the observed effective temperatures to warmer values using the observed strength of the chromospheric Hα emission, and redetermine the estimated masses of objects using pre-main-sequence evolutionary tracks in the H-R diagram. The effect of the activity-adjusted temperatures is to shift the objects to higher masses by 3%-100%. While the slope of the resulting IMF at substellar masses is not strongly changed, the peak of the IMF does shift from ≈0.06 to ≈0.11 M ⊙. Moreover, for objects with masses | |
dc.format.extent | 5 | |
dc.format.extent | 144381 | |
dc.language.iso | eng | |
dc.relation.ispartof | Astrophysical Journal | en |
dc.subject | brown dwarfs | en |
dc.subject | stars: activity | en |
dc.subject | stars: fundamental parameters | en |
dc.subject | stars: low-mass | en |
dc.subject | stars: luminosity function | en |
dc.subject | mass function | en |
dc.subject | QC Physics | en |
dc.subject | QB Astronomy | en |
dc.subject.lcc | QC | en |
dc.subject.lcc | QB | en |
dc.title | The impact of chromospheric activity on observed initial mass functions | en |
dc.type | Journal article | en |
dc.contributor.institution | University of St Andrews. School of Physics and Astronomy | en |
dc.identifier.doi | https://doi.org/10.1088/0004-637X/796/2/119 | |
dc.description.status | Peer reviewed | en |
dc.identifier.url | http://adsabs.harvard.edu/abs/2014ApJ...796..119S | en |
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