SIMBAD references

2017ApJ...847...97S - Astrophys. J., 847, 97-97 (2017/October-1)

Robo-AO Kepler asteroseismic survey. I. Adaptive optics imaging of 99 asteroseismic Kepler dwarfs and subgiants.

SCHONHUT-STASIK J.S., BARANEC C., HUBER D., ZIEGLER C., ATKINSON D., GAIDOS E., LAW N.M., RIDDLE R., HAGELBERG J., VAN DER MAREL N. and HODAPP K.W.

Abstract (from CDS):

We used the Robo-AO laser adaptive optics (AOs) system to image 99 main sequence and subgiant stars that have Kepler-detected asteroseismic signals. Robo-AO allows us to resolve blended secondary sources at separations as close as ∼0.''15 that may contribute to the measured Kepler light curves and affect asteroseismic analysis and interpretation. We report eight new secondary sources within 4.''0 of these Kepler asteroseismic stars. We used Subaru and Keck AOs to measure differential infrared photometry for these candidate companion systems. Two of the secondary sources are likely foreground objects, while the remaining six are background sources; however, we cannot exclude the possibility that three of the objects may be physically associated. We measured a range of i'-band amplitude dilutions for the candidate companion systems from 0.43% to 15.4%. We find that the measured amplitude dilutions are insufficient to explain the previously identified excess scatter in the relationship between asteroseismic oscillation amplitude and the frequency of maximum power.

Abstract Copyright: © 2017. The American Astronomical Society. All rights reserved.

Journal keyword(s): asteroseismology - binaries: close - instrumentation: adaptive optics - methods: observational - stars: fundamental parameters - techniques: high angular resolution - techniques: high angular resolution

Simbad objects: 107

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2019.09.19-09:05:10

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