FIES: The high‐resolution Fiber‐fed Echelle Spectrograph at the Nordic Optical Telescope

Telting, J. H.; Ávila, G.; Buchhave, Lars A.; Frandsen, S.; Gandolfi, D.; Lindberg, Bo; Stempels, H. C.; Prins, S.

doi:10.1002/asna.201312007

Cited by 231 publications

(207 citation statements)

References 8 publications

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“…(2016b), Dai et al (2016), andVan Eylen et al (2016a), respectively, and include RV measurements from the following instruments: FIES (Telting et. al 2014), HARPS-N (Cosentino et al 2012), HARPS (Mayor et.…”

Section: Rv Observations and Analysismentioning

confidence: 99%

Four Sub-Saturns with Dissimilar Densities: Windows into Planetary Cores and Envelopes

Petigura¹,

Sinukoff²,

Lopez³

et al. 2017

109

132

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We present results from a Keck/HIRES radial velocity campaign to study four sub-Saturn-sized planets, K2-27b, K2-32b, K2-39b, and K2-108b, with the goal of understanding their masses, orbits, and heavy-element enrichment. The planets have similar sizes (R P =4.5-5. M . Sub-Saturns as a population have a large diversity in planet mass at a given size. They exhibit remarkably little correlation between mass and size; sub-Saturns range from ≈6-60 Å M , regardless of size. We find a strong correlation between planet mass and host star metallicity, suggesting that metal-rich disks form more massive planet cores. The most massive sub-Saturns tend to lack detected companions and have moderately eccentric orbits, perhaps as a result of a previous epoch of dynamical instability. Finally, we observe only a weak correlation between the planet envelope fraction and present-day equilibrium temperature, suggesting that photo-evaporation does not play a dominant role in determining the amount of gas sub-Saturns accrete from their protoplanetary disks.

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Section: Rv Observations and Analysismentioning

confidence: 99%

Four Sub-Saturns with Dissimilar Densities: Windows into Planetary Cores and Envelopes

Petigura¹,

Sinukoff²,

Lopez³

et al. 2017

109

132

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“…We started the RV follow-up of EPIC 219388192 using the FIber-fed Échelle Spectrograph (FIES; Frandsen & Lindberg 1999;Telting et al 2014) mounted at the 2.56 m Nordic Optical Telescope (NOT) of the Roque de los Muchachos Observatory (La Palma, Spain). We took nine spectra between 2016 May and July as part of NOT observing programs P53-203, 53-109, and P53-016.…”

Section: Not/fiesmentioning

confidence: 99%

EPIC 219388192b—An Inhabitant of the Brown Dwarf Desert in the Ruprecht 147 Open Cluster

Nowak

Πάλλη

Gandolfi

et al. 2017

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We report the discovery of EPIC 219388192b, a transiting brown dwarf in a 5.3 day orbit around a member star of Ruprecht 147, the oldest nearby open cluster association, which was photometrically monitored by K2 during its Campaign 7. We combine the K2 time-series data with ground-based adaptive optics imaging and high-resolution spectroscopy to rule out false positive scenarios and determine the main parameters of the system. EPIC 219388192b has a radius of 1.01 0.03 R e , effective temperature T eff =5850± 85K, and iron abundance [Fe/H]=0.03±0.08dex. Its age, spectroscopic distance, and reddening are consistent with those of Ruprecht 147, corroborating its cluster membership. EPIC 219388192b is the first mature brown dwarf with precise determinations of mass, radius, and age, and serves as benchmark for evolutionary models in the substellar regime.

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“…The spectroscopic follow-up of Kepler-423 was performed with the FIbre-fed Échelle Spectrograph (FIES; Frandsen & Lindberg 1999;Telting et al 2014) We used the 1.3 high-res fibre, which provides, in conjunction with a 50-µm slit at the fibre exit, a resolving power of R = 67 000 in the spectral range 3600−7400 Å. Three consecutive exposures of 1200 s were taken per epoch observation to remove cosmic ray hits.…”

Section: High-resolution Spectroscopymentioning

confidence: 99%

Kepler-423b: a half-Jupiter mass planet transiting a very old solar-like star

Parviainen

Deeg

Lanza

et al. 2015

A&A

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We report the spectroscopic confirmation of the Kepler object of interest , a half-Jupiter mass planet transiting an old solar-like star every 2.7 days. Our analysis is the first to combine the full Kepler photometry (quarters 1−17) with high-precision radial velocity measurements taken with the FIES spectrograph at the Nordic Optical Telescope. We simultaneously modelled the photometric and spectroscopic data-sets using Bayesian approach coupled with Markov chain Monte Carlo sampling. We found that the Kepler pre-search data conditioned light curve of Kepler-423 exhibits quarter-to-quarter systematic variations of the transit depth, with a peak-to-peak amplitude of ∼4.3% and seasonal trends reoccurring every four quarters. We attributed these systematics to an incorrect assessment of the quarterly variation of the crowding metric. The host star Kepler-423 is a G4 dwarf with M = 0.85 ± 0.04 M , R = 0.95 ± 0.04 R , T eff = 5560 ± 80 K, [M/H] = −0.10 ± 0.05 dex, and with an age of 11 ± 2 Gyr. The planet Kepler-423b has a mass of M p = 0.595 ± 0.081 M Jup and a radius of R p = 1.192 ± 0.052 R Jup , yielding a planetary bulk density of ρ p = 0.459 ± 0.083 g cm −3 . The radius of Kepler-423b is consistent with both theoretical models for irradiated coreless giant planets and expectations based on empirical laws. The inclination of the stellar spin axis suggests that the system is aligned along the line of sight. We detected a tentative secondary eclipse of the planet at a 2σ confidence level (∆F ec = 14.2 ± 6.6 ppm) and found that the orbit might have a small non-zero eccentricity of 0.019 +0.028 −0.014 . With a Bond albedo of A B = 0.037 ± 0.019, Kepler-423b is one of the gas-giant planets with the lowest albedo known so far.

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FIES: The high‐resolution Fiber‐fed Echelle Spectrograph at the Nordic Optical Telescope

Cited by 231 publications

References 8 publications

Four Sub-Saturns with Dissimilar Densities: Windows into Planetary Cores and Envelopes

Four Sub-Saturns with Dissimilar Densities: Windows into Planetary Cores and Envelopes

EPIC 219388192b—An Inhabitant of the Brown Dwarf Desert in the Ruprecht 147 Open Cluster

Kepler-423b: a half-Jupiter mass planet transiting a very old solar-like star

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