Zobrazeno 1 - 10
of 104
pro vyhledávání: '"Holberg, Jay B."'
Autor:
Axelrod, Tim, Saha, Abhijit, Matheson, Thomas, Olszewski, Edward W., Bohlin, Ralph C., Calamida, Annalisa, Claver, Jenna, Deustua, Susana, Holberg, Jay B., Hubeny, Ivan, Mackenty, John W., Malanchev, Konstantin, Narayan, Gautham, Points, Sean, Rest, Armin, Sabbi, Elena, Stubbs, Christopher W.
Hot DA white dwarfs have fully radiative pure hydrogen atmospheres that are the least complicated to model. Pulsationally stable, they are fully characterized by their effective temperature Teff, and surface gravity log g, which can be deduced from t
Externí odkaz:
http://arxiv.org/abs/2305.07563
Autor:
Narayan, Gautham, Matheson, Thomas, Saha, Abhijit, Axelrod, Tim, Calamida, Annalisa, Olszewski, Edward, Claver, Jenna, Mandel, Kaisey S., Bohlin, Ralph C., Holberg, Jay B., Deustua, Susana, Rest, Armin, Stubbs, Christopher W., Shanahan, Clare E., Vaz, Amali L., Zenteno, Alfredo, Strampelli, Giovanni, Hubeny, Ivan, Points, Sean, Sabbi, Elena, Mackenty, John
We have established a network of 19 faint (16.5 mag $< V < $19 mag) northern and equatorial DA white dwarfs as spectrophotometric standards for present and future wide-field observatories. Our analysis infers SED models for the stars that are tied to
Externí odkaz:
http://arxiv.org/abs/1811.12534
Autor:
Wilson, David J., Gaensicke, Boris T., Koester, Detlev, Toloza, Odette, Holberg, Jay B., Preval, Simon P., Barstow, Martin A., Belardi, Claudia, Burleigh, Matthew R., Casewell, Sarah L., Cauley, P. Wilson, Chote, Paul, Farihi, Jay, Hollands, Mark A., Long, Knox S., Redfield, Seth
We present new Hubble Space Telescope (HST) ultraviolet and ground-based optical observations of the hot, metal-rich white dwarf GD 394. Extreme-ultraviolet (EUV) observations in 1992-1996 revealed a 1.15d periodicity with a 25 percent amplitude, hyp
Externí odkaz:
http://arxiv.org/abs/1811.10614
Autor:
Joyce, Simon R. G., Barstow, Martin A., Holberg, Jay B., Bond, Howard E., Casewell, Sarah L., Burleigh, Matthew R.
Einstein's theory of General Relativity predicts that the light from stars will be gravitationally shifted to longer wavelengths. We previously used this effect to measure the mass of the white dwarf Sirius B from the wavelength shift observed in its
Externí odkaz:
http://arxiv.org/abs/1809.01240
Autor:
Bond, Howard E., Schaefer, Gail H., Gilliland, Ronald L., Holberg, Jay B., Mason, Brian D., Lindenblad, Irving W., Seitz-McLeese, Miranda, Arnett, W. David, Demarque, Pierre, Spada, Federico, Young, Patrick A., Barstow, Martin A., Burleigh, Matthew R., Gudehus, Donald
Sirius, the seventh-nearest stellar system, is a visual binary containing the metallic-line A1 V star Sirius A, brightest star in the sky, orbited in a 50.13-year period by Sirius B, the brightest and nearest white dwarf (WD). Using images obtained o
Externí odkaz:
http://arxiv.org/abs/1703.10625
Autor:
Bainbridge, Matthew B., Barstow, Martin A., Reindl, Nicole, Tchang-Brillet, W. -Ü Lydia, Ayres, Thomas R., Webb, John K., Barrow, John D., Hu, Jiting, Holberg, Jay B., Preval, Simon P., Ubachs, Wim, Dzuba, Vladimir A., Flambaum, Victor V., Dumont, Vincent, Berengut, Julian C.
Publikováno v:
Universe 2017, 3(2), 32
Hot white dwarf stars are the ideal probe for a relationship between the fine-structure constant and strong gravitational fields, providing us with an opportunity for a direct observational test. We study a sample of hot white dwarf stars, combining
Externí odkaz:
http://arxiv.org/abs/1702.01757
Voyager Ultraviolet Spectrometers calibration and the heliosphere neutrals composition: reassessment
Autor:
Ben-Jaffel, Lotfi, Holberg, Jay B.
The Voyagers (V) 1 and 2 Ultraviolet Spectrometers (UVS) data harvest covers outer planets encounters, heliosphere sky-background measurements, and stellar spectrophotometry. Because their operation period overlaps with many ultraviolet missions, the
Externí odkaz:
http://arxiv.org/abs/1604.02656
Autor:
Narayan, Gautham, Axelrod, Tim, Holberg, Jay B., Matheson, Thomas, Saha, Abhijit, Olszewski, Edward W., Claver, Jenna, Stubbs, Christopher W., Bohlin, Ralph C., Deustua, Susana, Rest, Armin
We present initial results from a program aimed at establishing a network of hot DA white dwarfs to serve as spectrophotometric standards for present and future wide-field surveys. These stars span the equatorial zone and are faint enough to be conve
Externí odkaz:
http://arxiv.org/abs/1603.03825
Autor:
Bond, Howard E., Gilliland, Ronald L., Schaefer, Gail H., Demarque, Pierre, Girard, Terrence M., Holberg, Jay B., Gudehus, Donald, Mason, Brian D., Kozhurina-Platais, Vera, Burleigh, Matthew R., Barstow, Martin A., Nelan, Edmund P.
The nearby star Procyon is a visual binary containing the F5 IV-V subgiant Procyon A, orbited in a 40.84 yr period by the faint DQZ white dwarf Procyon B. Using images obtained over two decades with the Hubble Space Telescope, and historical measurem
Externí odkaz:
http://arxiv.org/abs/1510.00485
Autor:
Holberg, Jay B., Casewell, Sharah L., Bond, Howard E., Burleigh, Matthew R., Barstow, Martin A.
We present Hubble Space Telescope imaging and spectroscopy of HD 217411, a G3 V star associated with the extreme ultraviolet excess source (EUV 2RE J2300-07.0). This star is revealed to be a triple system with a G 3V primary (HD 217411 A) separated b
Externí odkaz:
http://arxiv.org/abs/1407.4332