Zobrazeno 1 - 10
of 76
pro vyhledávání: '"Armstrong, J. Thomas"'
Autor:
Baines, Ellyn K., Armstrong, J. Thomas, Clark III, James H., Gorney, Jim, Hutter, Donald J., Jorgensen, Anders M., Kyte, Casey, Mozurkewich, David, Nisley, Ishara, Sanborn, Jason, Schmitt, Henrique R., van Belle, Gerard T.
Publikováno v:
2021AJ....162..198B
We measured the angular diameters of 44 stars with the Navy Precision Optical Interferometer, obtaining uncertainties on the limb darkened diameter of 2% or less for all but four stars. We then used our diameters with Gaia or Hipparcos parallaxes to
Externí odkaz:
http://arxiv.org/abs/2211.09030
Autor:
Baines, Ellyn K., Armstrong, J. Thomas, Schmitt, Henrique R., Zavala, R. T., Benson, James A., Hutter, Donald J., Tycner, Christopher, van Belle, Gerard T.
Publikováno v:
Astronomical Journal, 2017, 155, 1
We present the fundamental properties of 87 stars based on angular diameter measurements from the Navy Precision Optical Interferometer, 36 of which have not been measured previously using interferometry. Our sample consists of 5 dwarfs, 3 subgiants,
Externí odkaz:
http://arxiv.org/abs/1712.08109
Autor:
Baines, Ellyn K., Armstrong, J. Thomas, Schmitt, Henrique R., Zavala, R. T., Benson, James A., Niedzielski, Andrzej, Zielinski, Pawel, Vanko, Martin, Wolszczan, Aleksander
We plan to measure the angular diameters of a sample of Penn State-Torun Planet Search (PTPS) giant exoplanet host star candidates using the Navy Precision Optical Interferometer. The radii of evolved giant stars obtained using spectroscopy are usual
Externí odkaz:
http://arxiv.org/abs/1609.02376
Autor:
Baines, Ellyn K., Armstrong, J. Thomas, Schmitt, Henrique R., Benson, James A., Zavala, R. T., van Belle, Gerard T.
Publikováno v:
Astrophysical Journal, 2014, 781, 90
Using the Navy Precision Optical Interferometer, we measured the angular diameters of 10 stars that have previously measured solar-like oscillations. Our sample covered a range of evolutionary stages but focused on evolved subgiant and giant stars. W
Externí odkaz:
http://arxiv.org/abs/1401.3342
We used the Navy Precision Optical Interferometer to measure the limb-darkened angular diameter of the exoplanet host star kappa CrB and obtained a value of 1.543 +/- 0.009 mas. We calculated its physical radius (5.06 +/- 0.04 R_Sun) and used photome
Externí odkaz:
http://arxiv.org/abs/1306.4322
Autor:
Baines, Ellyn K., Armstrong, J. Thomas
We measured the angular diameter of the exoplanet host star epsilon Eridani using the Navy Optical Interferometer. We determined its physical radius, effective temperature, and mass by combining our measurement with the star's parallax, photometry fr
Externí odkaz:
http://arxiv.org/abs/1112.0447
Autor:
Jorgensen, Anders M., Mozurkewich, Dave, Schmitt, Henrique, Hindsley, Robert, Armstrong, J. Thomas, Pauls, Thomas A., Hutter, D. J.
In this paper we will discuss the current status of coherent integration with the Navy Prototype Optical Interferometer (NPOI) (Armstrong et al. 2008). Coherent integration relies on being able to phase reference interferometric measurements, which i
Externí odkaz:
http://arxiv.org/abs/0807.3204
The discovery that Vega is a rapidly rotating pole-on star has raised a number of questions about this fundamental standard, including such issues as its composition, and in turn its mass and age. We report here a reanalysis of Vega's composition. A
Externí odkaz:
http://arxiv.org/abs/0803.3145
Autor:
Hajian, Arsen R., Behr, Bradford B., Cenko, Andrew T., Olling, Robert P., Mozurkewich, David, Armstrong, J. Thomas, Pohl, Brian, Petrossian, Sevan, Knuth, Kevin H., Hindsley, Robert B., Murison, Marc, Efroimsky, Michael, Dantowitz, Ronald, Kozubal, Marek, Currie, Douglas G., Nordgren, Tyler E., Tycner, Christopher, McMillan, Robert S.
Publikováno v:
Astrophys.J.661:616-633,2007
We have designed and constructed a ``dispersed Fourier Transform Spectrometer'' (dFTS), consisting of a conventional FTS followed by a grating spectrometer. By combining these two devices, we negate a substantial fraction of the sensitivity disadvant
Externí odkaz:
http://arxiv.org/abs/astro-ph/0611495
Autor:
Yoon, Jinmi, Peterson, Deane M., Armstrong, J. Thomas, Clark III, James H., Gilbreath, G. Charmaine, Pauls, Thomas, Schmitt, Henrique R., Zagarello, Robert J.
Publikováno v:
Publications of the Astronomical Society of the Pacific, 2007 Apr . 119(854), 437-443.
Externí odkaz:
https://www.jstor.org/stable/10.1086/518270
