Publications (44)
Bright stars observed by FIMS/SPEAR
Young-Soo Jo, Kwang-Il Seon, Kyoung-Wook Min +5
In this paper, we present a catalogue of the spectra of bright stars observed during the sky survey using the Far-Ultraviolet Imaging Spectrograph (FIMS), which was designed primar…
TEDI: the TripleSpec Exoplanet Discovery Instrument
Jerry Edelstein, Matthew Ward Muterspaugh, David J. Erskine +9
The TEDI (TripleSpec - Exoplanet Discovery Instrument) will be the first instrument fielded specifically for finding low-mass stellar companions. The instrument is a near infra-red…
Stellar Obliquity of the Ultra-Short-Period Planet System HD 93963
Huan-Yu Teng, Fei Dai, Andrew W. Howard +24
We report an observation of the Rossiter-McLaughlin (RM) effect of the transiting planet HD 93963 Ac, a mini-Neptune planet orbiting a G0-type star with an orbital period of $P_{\r…
The DESI Experiment Part I: Science,Targeting, and Survey Design
DESI Collaboration, Amir Aghamousa, Jessica Aguilar +290
DESI (Dark Energy Spectroscopic Instrument) is a Stage IV ground-based dark energy experiment that will study baryon acoustic oscillations (BAO) and the growth of structure through…
Evidence Against the Sciama Model of Radiative Decay of Massive Neutrinos
Stuart Bowyer, Eric J. Korpela, Jerry Edelstein +5
We report on spectral observations of the night sky in the band around 900 angstroms where the emission line in the Sciama model of radiatively decaying massive neutrinos would be…
The Robotic Multi-Object Focal Plane System of the Dark Energy Spectroscopic Instrument (DESI)
Joseph Harry Silber, Parker Fagrelius, Kevin Fanning +97
A system of 5,020 robotic fiber positioners was installed in 2019 on the Mayall Telescope, at Kitt Peak National Observatory. The robots automatically re-target their optical fiber…
Fabrication of the DESI Corrector Lenses
Timothy N. Miller, Robert W. Besuner, Michael E. Levi +10
The Dark Energy Spectroscopic Instrument (DESI) is under construction to measure the expansion history of the Universe using the Baryon Acoustic Oscillation technique. The spectra…
The DESI Experiment Part II: Instrument Design
DESI Collaboration, Amir Aghamousa, Jessica Aguilar +290
DESI (Dark Energy Spectropic Instrument) is a Stage IV ground-based dark energy experiment that will study baryon acoustic oscillations and the growth of structure through redshift…
Far-Ultraviolet Performance of the Berkeley Spectrograph During the ORFEUS-SPAS II Mission
Mark Hurwitz, Stuart Bowyer, Robert Bristol +6
The Berkeley spectrograph aboard the ORFEUS telescope made its second flight on the 14-day ORFEUS-SPAS II mission of the Space Shuttle Columbia in November/December 1996. Approxima…
Far-Ultraviolet Cooling Features of the Antlia Supernova Remnant
Jong-Ho Shinn, Kyoung Wook Min, Ravi Sankrit +7
We present far-ultraviolet observations of the Antlia supernova remnant obtained with Far-ultraviolet IMaging Spectrograph (FIMS, also called SPEAR). The strongest lines observed a…
Overview of the Dark Energy Spectroscopic Instrument
Paul Martini, Stephen Bailey, Robert W. Besuner +23
The Dark Energy Spectroscopic Instrument (DESI) is under construction to measure the expansion history of the Universe using the Baryon Acoustic Oscillation technique. The spectra…
Reanalyses of Voyager Ultraviolet Spectrometer Limits to the EUV and FUV Diffuse Astronomical Flux
Jerry Edelstein, Stuart Bowyer, Michael Lampton
We re-examine {\em Voyager} Ultraviolet Spectrograph data used to establish upper limits to the 500-900 Ã and 900-1100 Ã cosmic diffuse background. The measurement of dif…
Precise Stellar Radial Velocities of an M Dwarf with a Michelson Interferometer and a Medium-resolution Near-infrared Spectrograph
Philip S. Muirhead, Jerry Edelstein, David J. Erskine +13
Precise near-infrared radial velocimetry enables efficient detection and transit verification of low-mass extrasolar planets orbiting M dwarf hosts, which are faint for visible-wav…
The KPF SURFS-UP Survey I: Transmission Spectroscopy of WASP-76 b
Aaron Householder, Fei Dai, Aurora Kesseli +25
We introduce the KPF SURFS-UP (Spectroscopy of the Upper-atmospheres and ReFractory Species in Ultra-hot Planets) Survey, a high-resolution survey to investigate the atmospheric co…
Performance of the Dark Energy Spectroscopic Instrument(DESI) Fiber System
Claire Poppett, Patrick Jelinsky, Julien Guy +17
The recently commissioned Dark Energy Spectroscopic Instrument (DESI) will measure the expansion historyof the universe using the Baryon Acoustic Oscillation technique. The spectra…
The Lazuli Space Observatory: Architecture & Capabilities
Arpita Roy, Stuart Feldman, Pete Klupar +51
The Lazuli Space Observatory is a 3-meter aperture astronomical facility designed for rapid-response observations and precision astrophysics across visible to near-infrared wavelen…
Approaches to lowering the cost of large space telescopes
Ewan S Douglas, Greg Aldering, Greg W. Allan +26
New development approaches, including launch vehicles and advances in sensors, computing, and software, have lowered the cost of entry into space, and have enabled a revolution in…
A Test of Substellar Evolutionary Models with High-Precision Ages from Asteroseismology and Gyrochronology for the Benchmark System HR 7672AB
Yaguang Li, Michael C. Liu, Trent J. Dupuy +35
We present high-precision measurements for HR~7672AB, composed of a Sun-like (G0V) star and an L~dwarf companion. Three nights of precise (70 cm/s) radial velocity (RV) asteroseism…
A Vigorous Explorer Program
Martin Elvis, Matthew Beasley, Roger Brissenden +47
Explorers have made breakthroughs in many fields of astrophysics. The science from both these missions contributed to three Nobel Prizes - Giacconi (2002), Mather, and Smoot (2006)…
Photometric Calibrations for 21st Century Science
Stephen Kent, Mary Elizabeth Kaiser, Susana E. Deustua +33
The answers to fundamental science questions in astrophysics, ranging from the history of the expansion of the universe to the sizes of nearby stars, hinge on our ability to make p…
The Compositions of Rocky Planets in Close-in Orbits Tend to be Earth-Like
Casey L. Brinkman, Lauren M. Weiss, Daniel Huber +54
Hundreds of exoplanets between 1-1.8 times the size of the Earth have been discovered on close in orbits. However, these planets show such a diversity in densities that some appear…
Far-Ultraviolet Spectral Images of the Vela Supernova Remnant: Supplements and Comparisons with other Wavelength Images
Il-Joong Kim, Kwang-Il Seon, Kyoung-Wook Min +2
We present the improved far-ultraviolet (FUV) emission-line images of the entire Vela supernova remnant (SNR) using newly processed SPEAR/FIMS data. The incomplete C III λ977 and…
Comparison of the Diffuse Halpha and FUV Continuum Backgrounds: On the Origins of the Diffuse Halpha Background
Kwang-Il Seon, Adolf Witt, Il-Joong Kim +4
We compare the diffuse H map of our Galaxy with the FUV (1370-1710Ã ) continuum map. The H intensity correlates well with the FUV intensity. The H/FUV intensity ratio i…
Diffuse Far-ultraviolet Observation of the Lupus Loop Region
Jong-Ho Shinn, Kyoung Wook Min, Chi-Na Lee +7
Diffuse far-ultraviolet (FUV) emissions from the Lupus Loop region (SNR 330.0+15.0) have been observed with Spectroscopy of Plasma Evolution from Astrophysical Radiation (SPEAR), a…
Asteroseismology of the Nearby K-Dwarf Draconis using the Keck Planet Finder and TESS
Marc Hon, Daniel Huber, Yaguang Li +76
Asteroseismology of dwarf stars cooler than the Sun is very challenging due to the low amplitudes and rapid timescales of oscillations. Here, we present the asteroseismic detection…
Installation of the Dark Energy Spectroscopic Instrument at the Mayall 4-meter telescope
Robert Besuner, Lori Allen, Charles Baltay +34
The Dark Energy Spectroscopic Instrument (DESI) is a Stage IV ground-based dark energy experiment that will measure the expansion history of the Universe using the Baryon Acoustic…
Global Far-Ultraviolet Properties of the Cygnus Loop
Il-Joong Kim, Kwang-Il Seon, Yeo-Myeong Lim +4
We present the C III λ977, O VI λλ1032, 1038 and N IV] λ1486 emission line maps of the Cygnus Loop, obtained with the newly processed data of Spectroscopy of Plasma Evolution f…
TOI-880 is an Aligned, Coplanar, Multi-planet System
Elina Y. Zhang, Huan-Yu Teng, Fei Dai +22
Although many cases of stellar spin-orbit misalignment are known, it is usually unclear whether a single planet's orbit was tilted or if the entire protoplanetary disk was misalign…
TOI-4495: A Pair of Aligned, Near-Resonant Sub-Neptunes that Likely Experienced Overstable Migration
Mu-Tian Wang, Fei Dai, Hui-Gen Liu +24
We report the discovery of a sub-Neptune and a Neptune-like planet (, ) orbiting the F-type star TOI-449…
An Earth-sized Planet on the Verge of Tidal Disruption
Fei Dai, Andrew W. Howard, Samuel Halverson +95
TOI-6255~b (GJ 4256) is an Earth-sized planet (1.079 ) with an orbital period of only 5.7 hours. With the newly commissioned Keck Planet Finder (KPF) and CARMEN…
The SPEAR Instrument and On-Orbit Performance
Jerry Edelstein, Eric Korpela, Joe Adolfo +21
The SPEAR (or 'FIMS') instrumentation has been used to conduct the first large-scale spectral mapping of diffuse cosmic far ultraviolet (FUV, 900-1750 AA) emission, including impor…
Design and production of the DESI fibre cables
Jürgen Schmoll, Robert Besuner, David Bramall +9
The Dark Energy Spectroscopic Instrument (DESI) is under construction to measure the expansion history of the Universe using the Baryonic Acoustic Oscillation technique. The spectr…
The KPF-SLOPE Survey - Small, Compact Multi-Planet Systems Appear Spin-Orbit Aligned
Luke B. Handley, Andrew W. Howard, Fei Dai +16
The angle between stellar spin axes and planetary orbits -- stellar obliquity -- probes the dynamics of planetary migration and evolution. The obliquities of giant planets have bee…
SPEAR Far Ultraviolet Spectral Images of the Cygnus Loop
Kwang-Il Seon, Wonyong Han, Uk-Won Nam +7
We present far-ultraviolet (FUV) spectral images, measured at C IV 1550, He II 1640, Si IV+O IV] 1400, and O III] 1664, of the entire Cygnus Loop, observed with the Spectroscopy of…
Far-ultraviolet fluorescent molecular hydrogen emission map of the Milky Way Galaxy
Young-Soo Jo, Kwang-Il Seon, Kyoung-Wook Min +2
We present the far-ultraviolet (FUV) fluorescent molecular hydrogen (H_2) emission map of the Milky Way Galaxy obtained with FIMS/SPEAR covering ~76% of the sky. The extinction-cor…
Far Ultraviolet Absolute Flux of alpha Virginis
Carmen Morales, Joaquin Trapero, Jose F. Gomez +7
We present the far ultraviolet spectrum of alpha Virginis taken with EURD spectrograph on-board MINISAT-01. The spectral range covered is from ~900 to 1080 A with 5 A spectral reso…
Spectral Observations of Diffuse Far-Ultraviolet Emission from the Hot Phase of the Interstellar Medium with the Diffuse Ultraviolet Experiment
Eric J. Korpela, Stuart Bowyer, Jerry Edelstein
One of the keys to interpreting the character and evolution of interstellar matter in the galaxy is understanding the distribution of the low density hot (10^5 K -10^6 K) phase of…
Giving Cosmic Redshift Drift a Whirl
Alex G. Kim, Eric V. Linder, Jerry Edelstein +1
Redshift drift provides a direct kinematic measurement of cosmic acceleration but it occurs with a characteristic time scale of a Hubble time. Thus redshift observations with a cha…
Far-ultraviolet Observations of the North Ecliptic Pole with SPEAR
Eric J. Korpela, Jerry Edelstein, Julia Kregenow +7
We present SPEAR/FIMS far-ultraviolet observations near the North Ecliptic Pole. This area, at b~30 degrees and with intermediate HI column, seems to be a fairly typical line of si…
PSR B0656+14: Combined Optical, X-ray & EUV Studies
Aaron Golden, Andy Shearer, Jerry Edelstein
PSR B0656+14's high energy emission is consistent with that of combined magnetospheric and thermal (surface & polar cap) emission. Uncertainties with the radio-derived distance and…
A Nearby Dark Molecular Cloud in the Local Bubble Revealed via H Fluorescence
Blakesley Burkhart, Thavisha E. Dharmawardena, Shmuel Bialy +20
A longstanding prediction in interstellar theory posits that significant quantities of molecular gas, crucial for star formation, may be undetected due to being ``dark" in commonly…
Implications of the SPEAR FUV Maps on Our Understanding of the ISM
Eric J. Korpela, Martin Sirk, Jerry Edelstein +3
The distribution of a low-density transition temperature (10^4.5 - 10^5.5 K) gas in the interstellar medium conveys the character and evolution of diffuse matter in the Galaxy. Thi…
K-dwarf Radius Inflation and a 10-Gyr Spin-down Clock Unveiled through Asteroseismology of HD 219134 from the Keck Planet Finder
Yaguang Li, Daniel Huber, J. M. Joel Ong +26
We present the first asteroseismic analysis of the K3\,V planet host HD~219134, based on four consecutive nights of radial velocities collected with the Keck Planet Finder. We appl…
Global distribution of far-ultraviolet emissions from highly ionized gas in the Milky Way
Young-Soo Jo, Kwang-il Seon, Kyoung-Wook Min +2
We present all-sky maps of two major FUV cooling lines, C IV and O VI, of highly ionized gas to investigate the nature of the transition-temperature gas. From the extinction-correc…