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23 April 2024 |
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Article overview
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M Dwarf Activity in the Pan-STARRS 1 Medium-Deep Survey: First Catalog and Rotation Periods | | Erin Kado-Fong
; Peter K.G. Williams
; Andrew W. Mann
; Edo Berger
; William S. Burgett
; Kenneth C. Chambers
; Mark E. Huber
; Nicholas Kaiser
; Rolf-Peter Kudritzki
; Eugene A. Magnier
; Richard J. Wainscoat
; Christopher Waters
; | | Date: |
2 Aug 2016 | | Abstract: | We report on an ongoing project to investigate activity in the M dwarf
stellar population observed by the Pan-STARRS 1 Medium Deep Survey (PS1-MDS).
Using a custom-built pipeline, we refine an initial sample of $approx$ 4
million sources in PS1-MDS to a sample of 184,148 candidate cool stars using
color cuts. Motivated by the well-known relationship between rotation and
stellar activity, we use a multi-band periodogram analysis and visual vetting
to identify 271 sources that are likely rotating M dwarfs. We derive a new set
of polynomials relating M dwarf PS1 colors to fundamental stellar parameters
and use them to estimate the masses, distances, effective temperatures, and
bolometric luminosities of our sample. We present a catalog containing these
values, our measured rotation periods, and cross-matches to other surveys. Our
final sample spans periods of $lesssim$1-130 days in stars with estimated
effective temperatures of $approx$ 2700-4000 K. Twenty-two of our sources have
X-ray cross-matches, and they are found to be relatively X-ray bright as would
be expected from selection effects. Our data set provides evidence that
Kepler-based searches have not been sensitive to very slowly-rotating stars
($P_{
m rot} gtrsim 70$ d), implying that the observed emergence of very slow
rotators in studies of low-mass stars may be a systematic effect. We also see a
lack of low-amplitude ($<$2%) variability in objects with intermediate (10-40
d) rotation periods, which, considered in conjunction with other observational
results, may be a signpost of a loss of magnetic complexity associated with a
phase of rapid spin-down in intermediate-age M dwarfs. This work represents
just a first step in exploring stellar variability in data from the PS1-MDS
and, in the farther future, LSST. | | Source: | arXiv, 1608.0978 | | Services: | Forum | Review | PDF | Favorites | |
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