Edward Wishnow

Design and Performance of the Carruthers Geocoronal Imager

Martin Sirk, Alex M. Zhang, T. J. Immel, Jason B. McPhate et autres

The GeoCoronal Imager (GCI) onboard the Carruthers Geocorona Observatory is the primary scientific instrument of the mission. It is designed to measure far ultraviolet light at 121.6 nm (Lyman-alpha) emitted by hydrogen (H) atoms in Earth's exosphere with the sensitivity, accuracy and …

Design and Performance of the Carruthers Geocoronal Imager

Martin Sirk, Alex M. Zhang, T. J. Immel, Jason B. McPhate et autres

The GeoCoronal Imager (GCI) onboard the Carruthers Geocorona Observatory is the primary scientific instrument of the mission. It is designed to measure far ultraviolet light at 121.6 nm (Lyman-alpha) emitted by hydrogen (H) atoms in Earth's exosphere with the sensitivity, accuracy and …

us, be (code pays fourni par la source)

HD spectroscopy in the Lyman-Werner bands (91 - 112 nm) measured with VUV-FTS at Synchrotron SOLEIL

Keeyoon Sung, Frank A. F. Winiberg, N. de Oliveira, Karen Willacy et autres

H2 and HD can be destroyed both by collisions and by UV photons (photodissociation). In reality, however, direct photodissociation of H2 from the ground state (X 1Σ+g) by UV is very limited because transitions to the first excited state (b 3Σ+u) are …

us, fr (code pays fourni par la source)

TOI-6324 b: An Earth-mass Ultra-short-period Planet Transiting a Nearby M Dwarf

Rena A. Lee, Fei Dai, Andrew W. Howard, Samuel Halverson et autres

Abstract We report the confirmation of TOI-6324 b, an Earth-sized (1.059 ± 0.041 R ⊕) ultra-short-period (USP) planet orbiting a nearby (∼20 pc) M dwarf. Using the newly commissioned Keck Planet Finder spectrograph, we have measured the mass of TOI-6324 b 1.17 …

us, nl, au, ca, ch, cn (code pays fourni par la source)

TOI-6324b: An Earth-Mass Ultra-Short-Period Planet Transiting a Nearby M Dwarf

Rena A. Lee, Fei Dai, Andrew W. Howard, Samuel Halverson et autres

We report the confirmation of TOI-6324 b, an Earth-sized (1.059 $\pm$ 0.041 R$_\oplus$) ultra-short-period (USP) planet orbiting a nearby ($\sim$20 pc) M dwarf. Using the newly commissioned Keck Planet Finder (KPF) spectrograph, we have measured the mass of TOI-6324 b 1.17 $\pm$ …

A Testbed for Tidal Migration: The 3D Architecture of an Eccentric Hot Jupiter HD 118203 b Accompanied by a Possibly Aligned Outer Giant Planet

Jingwen Zhang, Daniel Huber, Lauren M. Weiss, Jerry W. Xuan et autres

Abstract Characterizing outer companions to hot Jupiters plays a crucial role in deciphering their origins. We present the discovery of a long-period giant planet, HD 118203 c ( m c = 11.79 − 0.63 + 0.69 M J , a c = …

Overview of the Fiber System for the Dark Energy Spectroscopic Instrument

Claire Poppett, Luke Tyas, J. Aguilar, C. Bebek et autres

Abstract The Dark Energy Spectroscopic Instrument (DESI) is a revolutionary instrument designed for precise measurements of cosmic distances and the investigation of dark energy. DESI utilizes 5000 optical fibers to simultaneously measure the spectra of distant objects and aims to measure 40 …

us, gb, ch, mx, es, co, fr, cn, ca, kr (code pays fourni par la source)

Asteroseismology of the Nearby K Dwarf σ Draconis Using the Keck Planet Finder and TESS

Marc Hon, Daniel Huber, Yaguang Li, Τ. S. Metcalfe et autres

Abstract Asteroseismology of dwarf stars cooler than the Sun is very challenging owing to the low amplitudes and rapid timescales of oscillations. Here we present the asteroseismic detection of solar-like oscillations at 4-minute timescales ( ν max ∼ 4300 μHz) in the …

us, au, fr, dk, pt, cn, gb, ch, nl (code pays fourni par la source)

KPF Confirms a Polar Orbit for KELT-18 b

Ryan A. Rubenzahl, Fei Dai, Samuel Halverson, Andrew W. Howard et autres

Abstract We present the first spectroscopic transit results from the newly commissioned Keck Planet Finder on the Keck-I telescope at W. M. Keck Observatory. We observed a transit of KELT-18 b, an inflated ultrahot Jupiter orbiting a hot star (T eff = …

An Earth-sized Planet on the Verge of Tidal Disruption

Fei Dai, Andrew W. Howard, Samuel Halverson, J. Orell-Miquel et autres

Abstract TOI-6255 b (GJ 4256) is an Earth-sized planet (1.079 ± 0.065 R ⊕) with an orbital period of only 5.7 hr. With the newly commissioned Keck Planet Finder and CARMENES spectrographs, we determine the planet’s mass to be 1.44 ± 0.14 …

us, es, au, ca, nl, jp, cn, de, be (code pays fourni par la source)

A Testbed for Tidal Migration: the 3D Architecture of an Eccentric Hot Jupiter HD 118203 b Accompanied by a Possibly Aligned Outer Giant Planet

Jingwen Zhang, Daniel Huber, Lauren M. Weiss, Jerry W. Xuan et autres

Characterizing outer companions to hot Jupiters plays a crucial role in deciphering their origins. We present the discovery of a long-period giant planet, HD 118203 c ($m_{c}=11.79^{+0.69}_{-0.63}\ \mathrm{M_{J}}$, $a_{c}=6.28^{+0.10}_{-0.11}$ AU) exterior to a close-in eccentric hot Jupiter HD 118203 b ($P_{b}=6.135\ \mathrm{days}$, …

An Earth-sized Planet on the Verge of Tidal Disruption

Fei Dai, Andrew W. Howard, Samuel Halverson, J. Orell-Miquel et autres

TOI-6255~b (GJ 4256) is an Earth-sized planet (1.079$\pm0.065$ $R_\oplus$) with an orbital period of only 5.7 hours. With the newly commissioned Keck Planet Finder (KPF) and CARMENES spectrographs, we determined the planet's mass to be 1.44$\pm$0.14 $M_{\oplus}$. The planet is just outside …