J. A. Johnson

Publication List Details

Period

1896 - 2009

Number

35

Co-Authors

Elemental abundances in the Galactic bulge from microlensed dwarf stars (2009)

Bensby, T., Feltzing, S., Johnson, J. A., Gould, A., Sana, H., Gal-Yam, A., ...

We present elemental abundances of 13 microlensed dwarf and subgiant stars in the Galactic bulge, which constitute the largest sample to date. We show that these stars span the full range of...

Two Exoplanets Discovered at Keck Observatory (2009)

Valenti, J. A., Fischer, D. A., Marcy, G. W., Johnson, J. A., Henry, G. W., Wright, J. T., ...

We present two exoplanets detected at Keck Observatory. HD 179079 is a G5 subgiant that hosts a hot Neptune planet with Msini = 27.5 M_earth in a 14.48 d, low-eccentricity orbit. The stellar reflex...

Five planets and an independent confirmation of HD 196885Ab from Lick Observatory (2009)

Fischer, D. A., Driscoll, P., Isaacson, H., Giguere, M., Marcy, G. W., Valenti, J. A., ...

We present time series Doppler data from Lick Observatory that reveal the presence of long-period planetary companions orbiting nearby stars. The typical eccentricity of these massive planets are...

HAT-P-13b,c: a transiting hot Jupiter with a massive outer companion on an eccentric orbit (2009)

Bakos, G. A., Howard, A. W., Noyes, R. W., Hartman, J., Torres, G., Kovacs, Geza, ...

We report on the discovery of a planetary system with a close-in transiting hot Jupiter on a near circular orbit and a massive outer planet on a highly eccentric orbit. The inner planet, HAT-P-13b,...

Automated Determination of [Fe/H] and [C/Fe] from Low-Resolution Spectroscopy (2009)

Marsteller, B., Beers, T. C., Sivarani, T., Rossi, S., Placco, V., Knapp, G. R., ...

We develop an automated spectral synthesis technique for the estimation of metallicities ([Fe/H]) and carbon abundances ([C/Fe]) for metal-poor stars, including carbon-enhanced metal-poor stars, for...

OGLE-2009-BLG-076S - The most metal-poor dwarf star in the Galactic bulge (2009)

Bensby, T., Feltzing, S., Johnson, J. A., Gal-Yam, A., Udalski, A., Gould, A., ...

Measurements based on a large number of red giant stars suggest a broad metallicity distribution function (MDF) for the Galactic bulge, centered on [Fe/H]=-0.1. However, recently, a new opportunity...

Chemical evolution of the Galactic bulge as traced by microlensed dwarf and subgiant stars (2009)

Bensby, T., Johnson, J. A., Cohen, J., Feltzing, S., Udalski, A., Gould, A., ...

Aims. Our aims are twofold. First we aim to evaluate the robustness and accuracy of stellar parameters and detailed elemental abundances that can be derived from high-resolution spectroscopic...

HAT-P-12b: A Low-Density Sub-Saturn Mass Planet Transiting a Metal-Poor K Dwarf (2009)

Hartman, J. D., Bakos, G. Á., Torres, G., Kovács, Géza, Noyes, R. W., Pál, A., ...

We report on the discovery of HAT-P-12b, a transiting extrasolar planet orbiting the moderately bright V=12.8 K4 dwarf GSC 03033-00706, with a period P = 3.2130598 +- 0.0000021 d, transit epoch Tc =...

Chemical evolution of the Galactic bulge as traced by microlensed dwarf and subgiant stars. Detailed abundance analysis of OGLE-2008-BLG-209S (2009)

Bensby, T., Johnson, J. A., Cohen, J., Feltzing, S., Udalski, A., Gould, A., ...

AIMS. Our aims are twofold. First we aim to evaluate the robustness and accuracy of stellar parameters and detailed elemental abundances that can be derived from high-resolution spectroscopic...

A holistic approach to carbon-enhanced metal-poor stars (2009)

Masseron, T., Johnson, J. A., Plez, B., Van Eck, S., Primas, F., Goriely, S., ...

Carbon-Enhanced Metal-Poor (CEMP) stars are known to be the direct witnesses of the nucleosynthesis of the first low- and intermediate-mass stars, because they have been polluted by a now-extinct AGB...

HAT-P-11b: A Super-Neptune Planet Transiting a Bright K Star in the Kepler Field (2009)

Bakos, G. Á., Torres, G., Pál, A., Hartman, J., Kovács, Géza, Noyes, R. W., ...

We report on the discovery of HAT-P-11b, the smallest radius transiting extrasolar planet (TEP), and the first hot Neptune discovered to date by transit searches. HAT-P-11b orbits the bright (V=9.59)...

Erbium- and chlorine-doped fluorozirconate-based glasses for up-converted fluorescence (2009)

Henke, B., Ahrens, B., Miclea, P.T., Eisenschmidt, C., Johnson, J.A., Schweizer, S.

A series of glass ceramics was prepared and its structure-property relationships evaluated. The base composition of the series was comprised of fluorozirconate (FZ) and fluorochlorozirconate (FCZ)...

Crystallization in heat-treated fluorochlorozirconate glasses (2009)

Johnson, J.A., Weber, J.K.R, Kolesnikov, A.I., Schweizer, S.

Crystallization phenomena of fluorochlorozirconate glasses were investigated by means of differential scanning calorimetry and inelastic neutron scattering. The precipitation of barium chloride...

Glass ceramics for high-resolution imaging (2009)

Johnson, J.A., Weber, R., Kolesnikov, A.I., Schweizer, S.

Glass-ceramic materials are being developed for use in digital mammography systems. The materials are transparent x-ray storage phosphors, which are potentially less expensive than competing...

Report of IAU Commission 30 on Radial Velocities (2006-2009) (2008)

Torres, G., Glushkova, E. V., Johnson, J. A., Levato, H., Nordström, B., Pourbaix, D., ...

Brief summaries are given on the following subjects: Radial velocities and exoplanets (Toward Earth-mass planets; Retired A stars and their planets; Current status and prospects); Toward higher...

Editors Managing Editor (2008)

D. G. Bourgin, G. G. Johnson, Bjarni Jnsson, Andrzej Lelek, J. Mac Nerney, J. W. Neuberger, ...

of the United States and Canada, $40.00. Each volume consists of four quarterly issues. Subscription orders should be addressed to the Managing Editor.

Paramagnetic hyperfine splitting in the Eu-151 Mössbauer spectra of CaF2:Eu2+ (2008)

Selling, J., Bielemeier, B., Wortmann, G., Johnson, J.A., Alp, E.E., Chen, T., ...

Eu-151 Mossbauer spectra in zero magnetic field of highly dilute (0.1 mol%) Eu2+ ions in CaF2 showed an almost temperature-independent asymmetrically split pattern, arising from the paramagnetic...

Paramagnetic hyperfine splitting in the Eu-151 Mössbauer spectra of CaF2:Eu2+ (2008)

Selling, J., Bielemeier, B., Wortmann, G., Johnson, J.A., Alp, E.E., Chen, T., ...

Eu-151 Mossbauer spectra in zero magnetic field of highly dilute (0.1 mol%) Eu2+ ions in CaF2 showed an almost temperature-independent asymmetrically split pattern, arising from the paramagnetic...

Exoplanet properties from Lick, Keck and AAT (2008)

Marcy, G. W, Butler, R. P, O'Toole, S. J, Upadhyay, S, Vogt, S. S, Fischer, D. A, ...

Doppler-shift measurements with a remarkable precision of Δλ/λ=3×10⁻⁹, corresponding to velocities of 1 m s⁻¹, have been made repeatedly of 2500 stars located within 300 light years. The...

Four new exoplanets and hints of additional substellar companions to exoplanet host stars (2007)

Wright, J. T., Marcy, Geoffrey W., Fischer, Debra A., Butler, R. Paul, Vogt, S. S., Tinney, C. G., ...

[Abstract]: We present four new exoplanets: HIP 14810b and HIP 14810c, HD 154345b, and HD 187123c. The two planets orbiting HIP 14810, from the N2K project, have masses of 3.9 and 0.76 MJ. We have...

Terrestrial ages, pairing, and concentration mechanism of Antarctic chondrites from Frontier Mountain, Northern Victoria Land (2006)

Welten, K. C., Nishiizumi, K., Caffee, M. W., Hillegonds, D. J., Johnson, J. A., Julli, A. J. T., ...

We report concentrations of cosmogenic Be-10, Al-26, Cl-36, and Ca-41 in the metal phase of 26 ordinary chondrites from Frontier Mountain (FRO), Antarctica, as well as cosmogenic C-14 in eight and...

Catalog of nearby exoplanets (2006)

Butler, R. Paul, Wright, J. T., Marcy, Geoffrey W., Fischer, Debra A., Vogt, S. S., Tinney, C. G., ...

[Abstract]: We present a catalog of nearby exoplanets. It contains the 172 known low-mass companions with orbits established through radial velocity and transit measurements around stars within 200...

Valuations of EQ-5D health states: are the United States and United Kingdom different? (2005)

Johnson, J.A., Luo, N., Shaw, J.W., Kind, P., Coons, S.J.

PURPOSE: We sought to compare directly elicited valuations for EQ-5D health states between the US and UK general adult populations. METHODS: We analyzed data from 2 EQ-5D valuation studies where,...

Animal growth promoters: to ban or not to ban? A risk assessment approach (2004)

Kelly, L.A., Smith, D.L., Snary, E.L., Johnson, J.A., Harris, A.D., Wooldridge, M., ...

The use of antibiotics for animal growth promotion has been controversial because of the potential transfer of antibiotic resistance from animals to humans. Such transfer could have severe public...

German Industry and Global Enterprise. BASF: the History of a Company (2004)

Abelshauser, W., Von Hippel, W., Johnson, J.A., Stokes, R.G.

This book examines the way in which BASF functions, delving into its corporate governance, financial system, industrial relations, systems of qualification, and relation to other companies in the...

Iodixanol Pharmacokinetics in Children (2001)

Marsters, P.A., Lloyd, T.R., Johnson, J.A., Slovis, Thomas L., Zales, V.R., ...

The objective of this report was to study the elimination pharmacokinetics of iodixanol in children. Iodixanol (V isipaque ®, Nycomed Inc., Wayne, PA, USA) is a new iso-osmolar iodinated...

Use of health status measures in patients with low back pain in clinical settings. Comparison of specific, generic and preference-based instruments (2000)

Suarez-Almazor, M. E., Kendall, C., Johnson, J. A., Skeith, K., Vincent, D.

Objective. To evaluate the discriminative performance over time of specific, generic and preference‐based instruments in patients with low back pain (LBP) in clinical settings....

Sensitivity to open boundary forcing in a fine-resolution model of the Iberian shelf-slope region (1997)

Stevens, I. G., Johnson, J. A.

A fine-resolution primitive equation numerical model is constructed for the Iberian continental shelf and slope region, with open boundaries to the north, south and west. The model is forced by...

Sensitivity to open boundary forcing in a fine-resolution model of the Iberian shelf-slope region (1997)

Stevens, I. G., Johnson, J. A.

A fine-resolution primitive equation numerical model is constructed for the Iberian continental shelf and slope region, with open boundaries to the north, south and west. The model is forced by...

Single dose pre-operative antimicrobial prophylaxis in abdominal operations (1982)

Danielsen, S., Garberg, O., Hognestad, J., Høsteng, T., Johnson, J. A., ...

Single dose pre-operative prophylaxis of tinidazole and doxycycline has recently been demonstrated to reduce infectious complications following colorectal surgery. The possible effect of such...

Associate Managing Editors (1980)

D. G. Bourgin, G. G. Johnson, Bjarni Jnsson, Andrzej Lelek, J. W. Neuberger, B. H. Neumann, ...

States and Canada $55.00. Each volume consists of four quarterly issues.

Covered Bridge Near Winslow, Indiana (1930)

Johnson, J.A.

The Winslow covered bridge crossed Patoka River at the south end of Main Street. It was most likely built in 1868 by W.T. Washer. The Burr Arch Truss structure was 150 feet long and 2 feet higher in...