Zobrazeno 91 - 100
of 637
pro vyhledávání: '"Geballe, T. R."'
Publikováno v:
Mon.Not.Roy.Astron.Soc. 350 (2004) L9
We present UKIRT UIST spectra of Sakurai's Object (=V4334 Sgr) showing CO fundamental band absorption features around 4.7 microns. The line-centres are at heliocentric radial velocity of -170+/-30 km/s. The number and relative strengths of the lines
Externí odkaz:
http://arxiv.org/abs/astro-ph/0403439
Autor:
Pavlenko, Ya. V., Geballe, T. R., Evans, A., Smalley, B., Eyres, S. P. S., Tyne, V. H., Yakovina, L. A.
Publikováno v:
Astron.Astrophys. 417 (2004) L39-L44
We present the results of our analysis of a high resolution (R ~ 30000) infrared spectrum of V4334 Sgr (Sakurai's Object) around the first overtone CO bands, obtained in 1998 July. The 12CO and 13CO bands are well-resolved, and we compute synthetic h
Externí odkaz:
http://arxiv.org/abs/astro-ph/0402624
Publikováno v:
Astron.J.127:3553,2004
We present JHK photometry and spectroscopy for a sample of newly identified L and T dwarfs from the Sloan Digital Sky Survey (SDSS) and known dwarfs from the SDSS and the Two Micron All Sky Survey (2MASS). Spectral classification has been carried out
Externí odkaz:
http://arxiv.org/abs/astro-ph/0402451
Autor:
Golimowski, D. A., Leggett, S. K., Marley, M. S., Fan, X., Geballe, T. R., Knapp, G. R., Vrba, F. J., Henden, A. A., Luginbuhl, C. B., Guetter, H. H., Munn, J. A., Canzian, B., Zheng, W., Tsvetanov, Z. I., Chiu, K., Glazebrook, K., Hoversten, E. A., Schneider, D. P., Brinkmann, J.
Publikováno v:
Astron.J.127:3516,2004
We have compiled L' and M' photometry of 63 single and binary M, L,and T dwarfs obtained at UKIRT using the MKO filter set. This compilation includes new L' data for 8 L dwarfs and 13 T dwarfs and new M' data for 7 L dwarfs, 5 T dwarfs, and Gl 229A.
Externí odkaz:
http://arxiv.org/abs/astro-ph/0402475
Autor:
Vrba, F. J., Henden, A. A., Luginbuhl, C. B., Guetter, H. H., Munn, J. A., Canzian, B., Burgasser, A. J., Kirkpatrick, J. Davy, Fan, X., Geballe, T. R., Golimowski, D. A., Knapp, G. R., Leggett, S. K., Schneider, D. P., Brinkman, J.
Publikováno v:
Astron.J.127:2948-2968,2004
We present preliminary trigonometric parallaxes and proper motions for 22 L dwarfs and 18 T dwarfs measured using the ASTROCAM infrared imager. Relative to absolute parallax corrections are made by employing 2MASS and/or SDSS photometry for reference
Externí odkaz:
http://arxiv.org/abs/astro-ph/0402272
Autor:
Lenorzer, A., Bik, A., de Koter, A., Kurtz, S. E., Waters, L. B. F. M., Kaper, L., Jones, C. E., Geballe, T. R.
Publikováno v:
Astron.Astrophys. 414 (2004) 245-259
We re-examine the nature of NGC2024-IRS2 in light of the recent discovery of the late O-type star, IRS2b, located 5 arcsec from IRS2. Using L-band spectroscopy, we set a lower limit of Av = 27.0 mag on the visual extinction towards IRS2. Arguments ba
Externí odkaz:
http://arxiv.org/abs/astro-ph/0310262
Publikováno v:
Astrophys.J. 595 (2003) 412-417
We present new spectroscopic observations of the He I $\lambda$10830 line in R Coronae Borealis (RCB) stars which provide the first strong evidence that most, if not all, RCB stars have winds. It has long been suggested that when dust forms around an
Externí odkaz:
http://arxiv.org/abs/astro-ph/0306099
Autor:
McCall, B. J., Huneycutt, A. J., Saykally, R. J., Geballe, T. R., Djuric, N., Dunn, G. H., Semaniak, J., Novotny, O., Al-Khalili, A., Ehlerding, A., Hellberg, F., Kalhori, S., Neau, A., Thomas, R., Osterdahl, F., Larsson, M.
The H3+ molecular ion plays a fundamental role in interstellar chemistry, as it initiates a network of chemical reactions that produce many interstellar molecules. In dense clouds, the H3+ abundance is understood using a simple chemical model, from w
Externí odkaz:
http://arxiv.org/abs/astro-ph/0302106
We present high-resolution (R = 20000) spectroscopy of H3+ absorption toward the luminous Galactic center sources GCS 3-2 and GC IRS 3. With the efficient wavelength coverage afforded by Subaru IRCS, six absorption lines of H3+ have been detected in
Externí odkaz:
http://arxiv.org/abs/astro-ph/0212159
Autor:
Lee, Sungho, Pak, Soojong, Davis, Christopher J., Herrnstein, Robeson M., Geballe, T. R., Ho, Paul T. P., Wheeler, J. Craig
Publikováno v:
Mon.Not.Roy.Astron.Soc. 341 (2003) 509
We have detected the v=1-0 S(1) (2.1218 um) and v=2-1 S(1) (2.2477 um) lines of H_2 in the Galactic centre, in a 90 x 27 arcsec region between the northeastern boundary of the non-thermal source, Sgr A East, and the giant molecular cloud (GMC) M-0.02
Externí odkaz:
http://arxiv.org/abs/astro-ph/0209619