SIMBAD references

2021AJ....161..173T - Astron. J., 161, 173-173 (2021/April-0)

The Epoch of giant planet Migration planet search program. I. Near-infrared radial velocity jitter of young Sun-like stars.

TRAN Q.H., BOWLER B.P., COCHRAN W.D., ENDL M., STEFANSSON G., MAHADEVAN S., NINAN J.P., BENDER C.F., HALVERSON S., ROY A. and TERRIEN R.C.

Abstract (from CDS):

We present early results from the Epoch of Giant Planet Migration program, a precise radial velocity (RV) survey of more than 100 intermediate-age (∼20-200 Myr) G and K dwarfs with the Habitable Zone Planet Finder spectrograph (HPF) at McDonald Observatory's Hobby-Eberly Telescope. The goals of this program are to determine the timescale and dominant physical mechanism of giant planet migration interior to the water ice line of Sun-like stars. Here, we summarize results from the first 14 months of this program, with a focus on our custom RV pipeline for HPF, a measurement of the intrinsic near-infrared RV activity of young Solar analogs, and modeling the underlying population-level distribution of stellar jitter. We demonstrate on-sky stability at the sub-2 m s–1 level for the K2 standard HD 3765 using a least-squares matching method to extract precise RVs. Based on a subsample of 29 stars with at least three RV measurements from our program, we find a median rms level of 34 m s–1. This is nearly a factor of 2 lower than the median rms level in the optical of 60 m s–1 for a comparison sample with similar ages and spectral types as our targets. The observed near-infrared jitter measurements for this subsample are well reproduced with a log-normal parent distribution with µ = 4.15 and σ = 1.02. Finally, by compiling rms values from previous planet search programs, we show that near-infrared jitter for G and K dwarfs generally decays with age in a similar fashion to optical wavelengths, albeit with a shallower slope and lower overall values for ages <=1 Gyr.

Abstract Copyright: © 2021. The American Astronomical Society. All rights reserved.

Journal keyword(s): Exoplanet evolution

Simbad objects: 42

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2022.09.30-19:11:33

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