Search Results - "Oswalt, D"

Stellar Stream Candidates in the Solar Neighborhood Found in the LAMOST DR3 and TGAS by Liang, X. L., Zhao, J. K., Oswalt, T. D., Chen, Y. Q., Zhang, L., Zhao, G.

“…We have cross-matched the LAMOST DR3 with the Gaia DR1 TGAS catalogs and obtained a sample of 166,827 stars with reliable kinematics. A technique based on the…”
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Two Portions of the Sagittarius Stream in the LAMOST Complete Spectroscopic Survey of Pointing Area at the Southern Galactic Cap by Zhao, J. K., Ye, X. H., Wu, H., Yang, M., Oswalt, Terry D., Xue, X. X., Chen, Y. Q., Zhang, J. J., Zhao, G.

“…We constructed a sample of 13,798 stars with Teff, log g, [Fe/H], radial velocity, proper motions, and parallaxes from LAMOST DR5 and Gaia DR2 in the LAMOST…”
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Tracing the Origin of Moving Groups. II. Chemical Abundance of Six Stars in the Halo Stream LAMOST-N1 by Zhao, J. K., Zhao, G., Aoki, W., Ishigaki, M. N., Suda, T., Matsuno, T., Shi, J. R., Xing, Q. F., Chen, Y. Q., Oswalt, Terry D., Kong, X. M., Liang, X. L.

“…We present the chemical abundances of six stars in the halo stream Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST)-N1, a new kinematically…”
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THE INITIAL-FINAL MASS RELATION AMONG WHITE DWARFS IN WIDE BINARIES by ZHAO, J. K, OSWALT, T. D, WILLSON, L. A, WANG, Q, ZHAO, G

“…We present the initial-final mass relation derived from 10 white dwarfs in wide binaries that consist of a main-sequence star and a white dwarf. The…”
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A giant planet orbiting the 'extreme horizontal branch' star V 391 Pegasi by Silvotti, R, Schuh, S, Janulis, R, Solheim, J.-E, Bernabei, S, Østensen, R, Oswalt, T. D, Bruni, I, Gualandi, R, Bonanno, A, Vauclair, G, Reed, M, Chen, C.-W, Leibowitz, E, Paparo, M, Baran, A, Charpinet, S, Dolez, N, Kawaler, S, Kurtz, D, Moskalik, P, Riddle, R, Zola, S

“…After the initial discoveries fifteen years ago, over 200 extrasolar planets have now been detected. Most of them orbit main-sequence stars similar to our Sun,…”
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NeuroDAC: an open-source arbitrary biosignal waveform generator by Powell, M P, Anso, J, Gilron, R, Provenza, N R, Allawala, A B, Sliva, D D, Bijanki, K R, Oswalt, D, Adkinson, J, Pouratian, N, Sheth, S A, Goodman, W K, Jones, S R, Starr, P A, Borton, D A

“…Researchers are developing biomedical devices with embedded closed-loop algorithms for providing advanced adaptive therapies. As these devices become more…”
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The 25 parsec local white dwarf population by Holberg, J B, Oswalt, T D, Sion, E M, McCook, G P

“…We have extended our detailed survey of the local white dwarf population from 20 to 25 pc, effectively doubling the sample volume, which now includes 232…”
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Stellar Chromospheric Activity and Age Relation from Open Clusters in the LAMOST Survey by Zhang, Jiajun, Zhao, Jingkun, Oswalt, Terry D., Fang, Xiangsong, Zhao, Gang, Liang, Xilong, Ye, Xianhao, Zhong, Jing

“…We identify member stars of more than 90 open clusters in the LAMOST survey. With the method of Fang et al., the chromospheric activity (CA) indices, for 1091…”
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Revisit of Open Clusters UPK 39, UPK 41, and PHOC 39: A New Binary Open Cluster Found by Ye, Xianhao, Zhao, Jingkun, Oswalt, Terry D., Yang, Yong, Zhao, Gang

“…Abstract We investigate the three open clusters near the Aquila Rift cloud, named UPK 39 ( c1 hereafter), UPK 41 ( c2 hereafter) in Sim et al. (2019), and PHOC…”
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A centennial gift from Einstein by Oswalt, T. D.

“…Deflection of a distant star's light provides a solution to the puzzling mass of a nearby white dwarf star The 1919 detection of the apparent displacement of…”
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Nearly 30,000 Late-type Main-sequence Stars with Stellar Age from LAMOST DR5 by Zhang, Jiajun, Zhao, Jingkun, Oswalt, Terry D., Liang, Xilong, Ye, Xianhao, Zhao, Gang

“…Abstract We construct a sample of nearly 30,000 main-sequence stars with 4500 K <  T eff  < 5000 K and stellar ages estimated by the chromospheric activity−age…”
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Stellar Archeology: What White Dwarf Stars Tell Us About the History of the Galaxy by Oswalt, Terry D.

“…White dwarf stars have played important roles in rather diverse areas of astrophysics. This paper outlines how these stellar remnants, especially those in…”
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A lower limit of 9.5 Gyr on the age of the Galactic disk from the oldest white dwarf stars by Oswalt, Terry D, Smith, J. Allyn, Wood, Matt A, Hintzen, Paul

“…Scientists report the initial results of a very deep survey of white dwarfs. Model age-luminosity relations are used to interpret the luminosity function of…”
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A Monte Carlo Method for Evaluating Empirical Gyrochronology Models and Its Application to Wide Binary Benchmarks by Otani, Tomomi, von Hippel, Ted, Buzasi, Derek, Oswalt, T. D., Stone-Martinez, Alexander, Majewski, Patrice

“…Abstract Accurate stellar ages are essential for our understanding of the star formation history of the Milky Way and Galactic chemical evolution, as well as…”
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A Determination of the Local Density of White Dwarf Stars by Holberg, J. B, Oswalt, Terry D, Sion, E. M

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LP 400-22, a Very Low Mass and High-Velocity White Dwarf by Kawka, Adela, Vennes, Stéphane, Oswalt, Terry D, Smith, J. Allyn, Silvestri, Nicole M

“…We report the identification of LP 400-22 (WD 2234+222) as a very low mass and high-velocity white dwarf. The ultraviolet GALEX and optical photometric colors…”
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LP 133-373: A New Chromospherically Active Eclipsing dMe Binary with a Distant, Cool White Dwarf Companion by Vaccaro, T. R, Rudkin, M, Kawka, A, Vennes, S, Oswalt, T. D, Silver, I, Wood, M, Smith, J. Allyn

“…We report the discovery of the partially eclipsing binary LP 133-373. Nearly identical eclipses along with observed photometric colors and spectroscopy…”
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Where are all the Sirius-like binary systems? by Holberg, J. B., Oswalt, T. D., Sion, E. M., Barstow, M. A., Burleigh, M. R.

“…Approximately 70 per cent of the nearby white dwarfs appear to be single stars, with the remainder being members of binary or multiple star systems. The most…”
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Orbital Characteristics of the Subdwarf-B and F V Star Binary EC 20117-4014 (=V4640 Sgr) by Otani, T., Oswalt, T. D., Lynas-Gray, A. E., Kilkenny, D., Koen, C., Amaral, M., Jordan, R.

“…Among the competing evolution theories for subdwarf-B (sdB) stars is the binary evolution scenario. EC 20117-4014 (=V4640 Sgr) is a spectroscopic binary system…”
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THREE MOVING GROUPS DETECTED IN THE LAMOST DR1 ARCHIVE by Zhao, J K, Zhao, G, Chen, Y Q, Oswalt, T D, Tan, K F, Zhang, Y

“…We analyze the kinematics of thick disk and halo stars observed by the Large Sky Area Multi-Object Fiber Spectroscopic Telescope. We have constructed a sample…”
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