John F. Kielkopf
A5082028534- Stellar, planetary, and galactic studies
- Astronomy and Astrophysical Research
- Astro and Planetary Science
- Astrophysics and Star Formation Studies
- Astronomical Observations and Instrumentation
- Spectroscopy and Laser Applications
- Laser-induced spectroscopy and plasma
- Atomic and Molecular Physics
- Atmospheric Ozone and Climate
- Gamma-ray bursts and supernovae
- Laser Design and Applications
- Calibration and Measurement Techniques
- Atomic and Subatomic Physics Research
- Advanced Chemical Physics Studies
- Solar and Space Plasma Dynamics
- Cold Atom Physics and Bose-Einstein Condensates
- Scientific Research and Discoveries
- Adaptive optics and wavefront sensing
- Quantum, superfluid, helium dynamics
- Plasma Diagnostics and Applications
- History and Developments in Astronomy
- Geophysics and Gravity Measurements
- Ionosphere and magnetosphere dynamics
- Spectroscopy and Quantum Chemical Studies
- High-pressure geophysics and materials
University of Louisville
2015-2024
University of Louisville Hospital
1972-2023
University of Southern Queensland
2019
Wright State University
1991
Argonne National Laboratory
1975
Johns Hopkins University
1968-1974
The effect of neutral nonresonant collisions on the shape, shift, and intensity atomic spectral-line profiles is reviewed. A general treatment for study an spectral line developed by establishing reasonable assumptions about relevant collision processes finding expression Fourier transform profile. authors look at parallel developments other methods calculation, consider special limits practical interest, illustrate numerical evaluations complete profiles. Interatomic potentials use in...
We present the discovery of KELT-1b, first transiting low-mass companion from wide-field Kilodegree Extremely Little Telescope-North (KELT-North) survey. The V=10.7 primary is a mildly evolved, solar-metallicity, mid-F star. brown dwarf or super-massive planet with mass 27.23+/-0.50 MJ and radius 1.110+0.037-0.024 RJ, on very short period (P=1.21750007) circular orbit. KELT-1b receives large amount stellar insolation, an equilibrium temperature assuming zero albedo perfect redistribution...
An approximation to the Voigt function is described, which valid over entire domain of independent variables that characterize it and accurate order 0.0001 peak value function. Relations between parameters are also given. The used develop a procedure for fitting observed lines with functions; class asymmetric arise from superposition two functions considered in some detail, methods extracting components contour envelope measurement width shape single line Fabry–Perot interferometer...
Data from the newly-commissioned \textit{Transiting Exoplanet Survey Satellite} (TESS) has revealed a "hot Earth" around LHS 3844, an M dwarf located 15 pc away. The planet radius of $1.32\pm 0.02$ $R_\oplus$ and orbits star every 11 hours. Although existence atmosphere such strongly irradiated is questionable, bright enough ($I=11.9$, $K=9.1$) for this possibility to be investigated with transit occultation spectroscopy. star's brightness planet's short period will also facilitate...
We present TRICERATOPS, a new Bayesian tool that can be used to vet and validate TESS Objects of Interest (TOIs). test the on 68 TOIs have been previously confirmed as planets or rejected astrophysical false positives. By looking in positive probability (FPP) -- nearby (NFPP) plane, we define criteria must meet classified validated (FPP < 0.015 NFPP 10^-3), likely 0.5 positives (NFPP > 10^-1). apply this procedure 384 unclassified statistically 12, classify 125 planets, 52 Of 12 9 are newly...
Observations of cooler and brown dwarfs show that the contribution from broadening at many bars pressure is becoming important. The opacity in red optical to near-IR region under these conditions dominated by extremely pressure-broadened wings alkali resonance lines, particular, K I doublet 0.77 μm. Collisions with H2 are preponderant dwarf atmospheres an effective temperature about 1000 K; perturber densities reach several 1019 even Jupiter-mass planets exceed 1020 for super-Jupiters older...
Wide field surveys for transiting planets are well suited to searching diverse stellar populations, enabling a better understanding of the link between properties and their parent stars. We report discovery HAT-P-69b (TOI 625.01) HAT-P-70b 624.01), two new hot Jupiters around A stars from HATNet survey which have also been observed by Transiting Exoplanet Survey Satellite (TESS). has mass 3.58 +0.58/-0.58 MJup radius 1.676 +0.051/-0.033 RJup, residing in prograde 4.79-day orbit. 1.87...
We present the confirmation of two new planets transiting nearby mid-M dwarf LTT 3780 (TIC 36724087, TOI-732, $V=13.07$, $K_s=8.204$, $R_s$=0.374 R$_{\odot}$, $M_s$=0.401 M$_{\odot}$, d=22 pc). The planet candidates are identified in a single TESS sector and validated with reconnaissance spectroscopy, ground-based photometric follow-up, high-resolution imaging. With measured orbital periods $P_b=0.77$ days, $P_c=12.25$ days sizes $r_{p,b}=1.33\pm 0.07$ R$_{\oplus}$, $r_{p,c}=2.30\pm 0.16$...
Abstract NASA’s Transiting Exoplanet Survey Satellite (TESS) mission promises to improve our understanding of hot Jupiters by providing an all-sky, magnitude-limited sample transiting suitable for population studies. Assembling such a requires confirming hundreds planet candidates with additional follow-up observations. Here we present 20 that were detected using TESS data and confirmed be planets through photometric, spectroscopic, imaging observations coordinated the Follow-up Observing...
Abstract JWST has ushered in an era of unprecedented ability to characterize exoplanetary atmospheres. While there are over 5000 confirmed planets, more than 4000 Transiting Exoplanet Survey Satellite (TESS) planet candidates still unconfirmed and many the best planets for atmospheric characterization may remain be identified. We present a sample TESS that we identify as “best-in-class” transmission emission spectroscopy with JWST. These targets sorted into bins across equilibrium...
We present the first brown dwarf atmosphere models based on theoretical calculations of absorption profiles sodium and potassium perturbed by helium molecular hydrogen. The synthetic spectra have been compared to previous with Lorentz classic van der Waals approximation, observed spectrum T SDSS 1624. new provide increased opacities in optical methane dwarfs. However, far wings alone cannot explain missing opacity 0.85 1.1 μm range.
Context.T-type dwarfs present a broad and shallow absorption feature centred around 6950 Å in the blue wing of K doublet at 0.77 μm which resembles depth shape satellite predicted by detailed collisional broadening profiles. In our previous work, position line was however somewhat too compared to observed feature.
We report the discovery of KELT-7b, a transiting hot Jupiter with mass MJ, radius RJ, and an orbital period days. The bright host star (HD 33643; KELT-7) is F-star V = 8.54, Teff 6789 K, [Fe/H] , . It has M⊙, R⊙, fifth most massive, hottest, ninth brightest known to planet. also around which Kilodegree Extremely Little Telescope (KELT) discovered Thus, KELT-7b ideal target for detailed characterization given its relatively low surface gravity, high equilibrium temperature, star. rapid...
ImageJ is a graphical user interface (GUI) driven, public domain, Java-based, software package for general image processing traditionally used mainly in life sciences fields. The capabilities of are useful and extendable to other scientific Here we present AstroImageJ (AIJ), which provides an astronomy specific display environment tools calibration data reduction. Although AIJ maintains the purpose ImageJ, streamlined time-series differential photometry, light curve detrending fitting,...
We report the joint WASP/KELT discovery of WASP-167b/KELT-13b, a transiting hot Jupiter with 2.02-d orbit around $V$ = 10.5, F1V star [Fe/H] 0.1 $\pm$ 0.1. The 1.5 R$_{\rm Jup}$ planet was confirmed by Doppler tomography stellar line profiles during transit. place limit $<$ 8 M$_{\rm on its mass. is in retrograde sky-projected spin-orbit angle $\lambda -165^{\circ} \pm 5^{\circ}$. This agreement known tendency for orbits hotter stars to be more likely misaligned. WASP-167/KELT-13 one few...
Abstract We announce the discovery of KELT-16b, a highly irradiated, ultra-short period hot Jupiter transiting relatively bright ( V = 11.7) star TYC 2688-1839-1/KELT-16. A global analysis system shows KELT-16 to be an F7V with <?CDATA ${T}_{\mathrm{eff}}=6236\pm 54$?> K, $\mathrm{log}{g}_{\star }={4.253}_{-0.036}^{+0.031}$?> , $[\mathrm{Fe}/{\rm{H}}]=-{0.002}_{-0.085}^{+0.086}$?> ${M}_{\star }={1.211}_{-0.046}^{+0.043}\,{M}_{\odot }$?> and ${R}_{\star }\,={1.360}_{-0.053}^{+0.064}{R}_{\odot...
We present the discovery and characterisation of two transiting planets observed by Transiting Exoplanet Survey Satellite (TESS) orbiting nearby (d ~ 22 pc), bright (J 9 mag) M3.5 dwarf LTT 3780 (TOI-732). confirm both their association with via ground-based photometry determine masses using precise radial velocities measured CARMENES spectrograph. Precise stellar parameters determined from high resolution spectra that is a mid-M an effective temperature T_eff = 3360 +\- 51 K, surface...
We present the discovery of KELT-21b, a hot Jupiter transiting $V=10.5$ A8V star HD 332124. The planet has an orbital period $P=3.6127647\pm0.0000033$ days and radius $1.586_{-0.040}^{+0.039}$ $R_J$. set upper limit on planetary mass $M_P<3.91$ $M_J$ at $3\sigma$ confidence. confirmed nature companion using this Doppler tomographic observations to verify that transits These data also demonstrate orbit is well-aligned with stellar spin, sky-projected spin-orbit misalignment...
Planets around young stars trace the early evolution of planetary systems. We report discovery and validation two systems with ages $\lesssim 300$ Myr from observations by Transiting Exoplanet Survey Satellite. TOI-251 is a 40-320 old G star hosting 2.74 +0.18/-0.18 REarth mini-Neptune 4.94 day period. TOI-942 20-160 K system inflated Neptune-sized planets, TOI-942b orbiting period 4.32 days, radius 4.81 +0.20/-0.20 REarth, TOI-942c in 10.16 days 5.79 +0.19/-0.18 REarth. Though we cannot...
We report the first discovery of a transiting circumbinary planet detected from single sector TESS data. During Sector 21, TIC 172900988b transited primary star and then 5 days later it secondary star. The binary is itself eclipsing, with period P = 19.7 an eccentricity e 0.45. Archival data ASAS-SN, Evryscope, KELT, SuperWASP reveal prominent apsidal motion orbit, caused by dynamical interactions between planet. A comprehensive photodynamical analysis TESS, archival follow-up yields stellar...
Abstract The Kepler and TESS missions have demonstrated that planets are ubiquitous. However, the success of these heavily depends on ground-based radial velocity (RV) surveys, which combined with transit photometry can yield bulk densities orbital properties. While most host stars too faint for detailed follow-up observations, is detecting orbiting nearby bright more amenable to RV characterization. Here, we introduce TESS-Keck Survey (TKS), an program using ∼100 nights Keck/HIRES study...
We report the discovery of KELT-3b, a moderately inflated transiting hot Jupiter with mass 1.477 (-0.067, +0.066) M_J, and radius 1.345 +/- 0.072 R_J, an orbital period 2.7033904 0.000010 days. The host star, KELT-3, is V=9.8 late F star M_* = 1.278 (-0.061, +0.063) M_sun, R_* 1.472 +0.065) R_sun, T_eff 6306 (-49, +50) K, log(g) 4.209 (-0.031, +0.033), [Fe/H] 0.044 (-0.082, +0.080), has likely proper motion companion. KELT-3b third exoplanet discovered by KELT survey, orbiting one 20...