2,431 research outputs found
LASR-Guided Stellar Photometric Variability Subtraction: The Linear Algorithm For Significance Reduction
We develop a technique for removing stellar variability in the light curves
of -Scuti and similar stars. Our technique, which we name the Linear
Algorithm for Significance Reduction (LASR), subtracts oscillations from a time
series by minimizing their statistical significance in frequency space. We
demonstrate that LASR can subtract variable signals of near-arbitrary
complexity and can robustly handle close frequency pairs and overtone
frequencies. We demonstrate that our algorithm performs an equivalent fit as
prewhitening to the straightforward variable signal of KIC 9700322. We also
show that LASR provides a better fit to seismic activity than prewhitening in
the case of the complex -Scuti KOI-976.Comment: 9 pages, 5 figures, accepted for publication in Astronomy &
Astrophysics. Pseudocode and github link to code included in manuscrip
Open- and closed-system characteristics of a tilted plutonic system, Klamath Mountains, California
The Wooley Creek batholith and Slinkard pluton are adjacent plutons with identical U-Pb zircon ages of 161 +4/−2 Ma. The plutons dip toward each other, which suggests that they are connected in the subsurface. Geologic and thermochemical evidence shows that the Slinkard pluton is the structurally lowest part of the system and the Wooley Creek batholith the structurally highest, with a total structural relief of at least 15 km. The wall rocks adjacent to the highest level of the Wooley Creek batholith are intruded by mafic to felsic dikes derived from the subjacent pluton. The Slinkard pluton is predominantly quartz diorite but grades from two-pyroxene diorite to sparse muscovite-biotite granite and shows little evidence of contamination except near contacts. The Wooley Creek batholith grades upward from two-pyroxene gabbro to biotite-hornblende granite and has a central zone in which injected mafic magma was trapped and mixed. Major and trace element data are consistent with closed-system fractionation of the Slinkard pluton and lower (adjacent) Wooley Creek batholith, but with open-system differentiation of the upper Wooley Creek batholith and roof-zone dikes. Andesitic roof-zone dikes show trace element enrichment similar to the central mixed zone of the Wooley Creek batholith and may have differentiated at that central level of the system
Evidence of Titan's Climate History from Evaporite Distribution
Water-ice-poor, 5-m-bright material on Saturn's moon Titan has
previously been geomorphologically identified as evaporitic. Here we present a
global distribution of the occurrences of the 5-m-bright spectral unit,
identified with Cassini's Visual Infrared Mapping Spectrometer (VIMS) and
examined with RADAR when possible. We explore the possibility that each of
these occurrences are evaporite deposits. The 5-m-bright material covers
1\% of Titan's surface and is not limited to the poles (the only regions with
extensive, long-lived surface liquid). We find the greatest areal concentration
to be in the equatorial basins Tui Regio and Hotei Regio. Our interpretations,
based on the correlation between 5-m-bright material and lakebeds, imply
that there was enough liquid present at some time to create the observed
5-m-bright material. We address the climate implications surrounding a
lack of evaporitic material at the south polar basins: if the south pole basins
were filled at some point in the past, then where is the evaporite
Overload Injury of the Knees With Resistance-Exercise Overtraining: A Case Study
This is the publisher's version, also found at http://ehis.ebscohost.com/ehost/detail?vid=3&sid=cc60431c-6281-4940-bc2d-85f4c9ff2060%40sessionmgr11&hid=17&bdata=JnNpdGU9ZWhvc3QtbGl2ZQ%3d%3d#db=s3h&AN=SPHS-67196
A 37‐Year‐Old Man With Primary Antiphospholipid Syndrome Presenting With Respiratory Distress and Worsening Toe Ischemia
Peer Reviewedhttps://deepblue.lib.umich.edu/bitstream/2027.42/137728/1/acr23168.pdfhttps://deepblue.lib.umich.edu/bitstream/2027.42/137728/2/acr23168_am.pd
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