&lt;title&gt;HIRES: the high-resolution echelle spectrometer on the Keck 10-m Telescope&lt;/title&gt;

Vogt, Steven S.; Allen, Steven L.; Bigelow, Bruce C.; Bresee, L.; Brown, William E; Cantrall, T.; Conrad, Albert; Couture, M. D.; Delaney, Colleen R.; Epps, Harland W.; Hilyard, Darrie; Hilyard, David F.; Horn, E.; Jern, Neal; Kanto, Dick; Keane, Michael; Kibrick, Robert I.; Lewis, James W.; Osborne, Jack; Pardeilhan, Gerard H.; Pfister, Terry; Ricketts, Todd A.; Robinson, L. B.; Stover, R. J.; Tucker, Dean; Ward, Janice M.; Wei, Mingzhi

doi:10.1117/12.176725

Cited by 1,307 publications

(199 citation statements)

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“…We observed all 1305 stars in the CKS sample with the HIRES spectrometer (Vogt et al 1994) at the W. M. Keck Observatory. We used an exposure meter to stop the exposures after achieving a signal-to-noise ratio (S/N) of 45 per pixel (90 per resolution element) at the peak of the blaze function in the spectral order containing 550 nm.…”

Section: Observationsmentioning

confidence: 99%

The California-Kepler Survey. I. High-resolution Spectroscopy of 1305 Stars Hosting Kepler Transiting Planets^*

et al. 2017

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The California-Kepler Survey (CKS) is an observational program developed to improve our knowledge of the properties of stars found to host transiting planets by NASA's Kepler Mission. The improvement stems from new high-resolution optical spectra obtained using HIRES at the W. M. Keck Observatory. The CKS stellar sample comprises 1305 stars classified as Kepler objects of interest, hosting a total of 2075 transiting planets. The primary sample is magnitude-limited ( < Kp 14.2) and contains 960 stars with 1385 planets. The sample was extended to include some fainter stars that host multiple planets, ultra-short period planets, or habitable zone planets. The spectroscopic parameters were determined with two different codes, one based on template matching and the other on direct spectral synthesis using radiative transfer. We demonstrate a precision of 60K in T eff , 0.10dex in g log , 0.04dex in [ ] Fe H , and 1.0 -km s 1 in V i sin . In this paper, we describe the CKS project and present a uniform catalog of spectroscopic parameters. Subsequent papers in this series present catalogs of derived stellar properties such as mass, radius, and age; revised planet properties; and statistical explorations of the ensemble. CKS is the largest survey to determine the properties of Kepler stars using a uniform set of high-resolution, high signal-tonoise ratio spectra. The HIRES spectra are available to the community for independent analyses.

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Section: Observationsmentioning

confidence: 99%

The California-Kepler Survey. I. High-resolution Spectroscopy of 1305 Stars Hosting Kepler Transiting Planets^*

et al. 2017

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“…Simultaneous observations of potassium and sodium in Europa's extended atmosphere were made on 9 September 1998 at the W. M. Keck telescope using HIRES, the facility echelle spectrograph (Vogt et al 1994). Identical observations of Io's extended atmosphere were obtained on 15 November 1998.…”

Section: Observationsmentioning

confidence: 99%

Potassium in Europa's Atmosphere

Brown

2001

Icarus

105

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Trace element abundances in the sputtered extended atmospheres of the Galilean satellites reflect the surface abundances of these trace elements and can thus serve as signatures of surface processes on these satellites. We have measured sodium and potassium abundances in the extended atmospheres of Europa and Io, and derive sodium-to-potassium ratios of 25 ± 2 and 10 ± 3. The large difference between the values of Na/K in these atmospheres is difficult to explain if the dominant source of sodium for Europa's surface is implantation of Io sodium, as suggested earlier. The three remaining likely sources for trace elements on the surface of Europametals brought in from meteoritic impact, trace elements native to the surface ices, and salts deposited in liquid water resurfacing events-are all broadly consistent with the measured sodium-topotassium ratio at Europa. Observations of additional trace elements are required to further discriminate among these possible sources.

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“…New spectra and compiled spectroscopic data We collected both archival and new spectroscopic data at high dispersion with the Keck/HIRES spectrograph (Vogt et al 1994). The new observations were obtained on one of : 2016 May 17 and20, 2015 June 1 and 2, or 2013 June 4, UT, and covered the spectral range ∼4800Å to 9200Å at resolution R ≈ 36, 000.…”

Section: Observationsmentioning

confidence: 99%

A Continuum of Accretion Burst Behavior in Young Stars Observed by K2

Cody

Hillenbrand

David

et al. 2017

ApJ

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We present 29 likely members of the young ρ Oph or Upper Sco regions of recent star formation that exhibit "accretion burst" type light curves in K2 time series photometry. The bursters were identified by visual examination of their ∼80 day light curves, though all satisfy the M < −0.25 flux asymmetry criterion for burst behavior defined by Cody et al. (2014). The burst sources represent ≈9% of cluster members with strong infrared excess indicative of circumstellar material. Higher amplitude burster behavior is correlated with larger inner disk infrared excesses, as inferred from WISE W 1 − W 2 color. The burst sources are also outliers in their large Hα emission equivalent widths. No distinction between bursters and non-bursters is seen in stellar properties such as multiplicity or spectral type. The frequency of bursters is similar between the younger, more compact ρ Oph region, and the older, more dispersed Upper Sco region. The bursts exhibit a range of shapes, amplitudes (∼10-700%), durations (∼1-10 days), repeat time scales (∼3-80 days), and duty cycles (∼10-100%). Our results provide important input to models of magnetospheric accretion, in particular by elucidating the properties of accretion-related variability in the low state between major longer duration events such as EX Lup and FU Ori type accretion outbursts. We demonstrate the broad continuum of accretion burst behavior in young stars -extending the phenomenon to lower amplitudes and shorter timescales than traditionally considered in the theory of pre-main sequence accretion history.

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<title>HIRES: the high-resolution echelle spectrometer on the Keck 10-m Telescope</title>

Cited by 1,307 publications

References 0 publications

The California-Kepler Survey. I. High-resolution Spectroscopy of 1305 Stars Hosting Kepler Transiting Planets^*

The California-Kepler Survey. I. High-resolution Spectroscopy of 1305 Stars Hosting Kepler Transiting Planets^*

Potassium in Europa's Atmosphere

A Continuum of Accretion Burst Behavior in Young Stars Observed by K2

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<title>HIRES: the high-resolution echelle spectrometer on the Keck 10-m Telescope</title>

Cited by 1,307 publications

References 0 publications

The California-Kepler Survey. I. High-resolution Spectroscopy of 1305 Stars Hosting Kepler Transiting Planets*

The California-Kepler Survey. I. High-resolution Spectroscopy of 1305 Stars Hosting Kepler Transiting Planets*

Potassium in Europa's Atmosphere

A Continuum of Accretion Burst Behavior in Young Stars Observed by K2

Contact Info

Product

Resources

About

The California-Kepler Survey. I. High-resolution Spectroscopy of 1305 Stars Hosting Kepler Transiting Planets^*

The California-Kepler Survey. I. High-resolution Spectroscopy of 1305 Stars Hosting Kepler Transiting Planets^*