Geballe, T. R., Mason, R. E., Rodríguez-Ardila, A., Axon, D. J.
We report moderate resolution 3-5 micron spectroscopy of the nucleus of NGC 1068 obtained at 0.3 arcsec (20 pc) resolution with the spectrograph slit aligned approximately along the ionization cones...
Stephens, D. C., Leggett, S. K., Cushing, Michael C., Marley, Mark S., Saumon, D., Geballe, T. R., ...
We present new 5.2-14.5 micron low-resolution spectra of 14 mid-L to mid-T dwarfs, as well as 3.0-4.1 micron spectra for five of these dwarfs. These data are supplemented by existing red and...
Do Hydrogen-deficient Carbon Stars have Winds? (2009)
Geballe, T. R., Rao, N. Kameswara, Clayton, Geoffrey C.
We present high resolution spectra of the five known hydrogen-deficient carbon (HdC) stars in the vicinity of the 10830 Angstrom line of neutral helium. In R Coronae Borealis (RCB) stars the He I...
Spectroscopic Detection of Carbon Monoxide in Two Late-type T Dwarfs (2009)
Geballe, T. R., Saumon, D., Golimowski, D. A., Leggett, S. K., Marley, M. S., Noll, K. S.
M band spectra of two late-type T dwarfs, 2MASS J09373487+2931409, and Gliese 570D, confirm evidence from photometry that photospheric CO is present at abundance levels far in excess of those...
Sakurai's Object: characterising the near-infrared CO ejecta between 2003 and 2007 (2008)
Worters, H L., Rushton, M. T., Eyres, S. P. S., Geballe, T. R., Evans, A.
We present observations of Sakurai's Object obtained at 1-5um between 2003 and 2007. By fitting a radiative transfer model to an echelle spectrum of CO fundamental absorption features around 4.7um,...
Metallicity in the Galactic Center: The Quintuplet cluster (2008)
Najarro, Francisco, Figer, Don F., Hillier, D. John, Geballe, T. R., Kudritzki, Rolf P.
We present a measurement of metallicity in the Galactic center Quintuplet Cluster made using quantitative spectral analysis of two Luminous Blue Variables (LBVs). The analysis employs line-blanketed...
Goto, Miwa, Usuda, T., Nagata, T., Geballe, T. R., McCall, B. J., Indriolo, N., ...
Infrared absorption lines of H3+, including the metastable R(3,3)l line, have been observed toward eight bright infrared sources associated with hot and massive stars located in and between the...
Goto, Miwa, Usuda, Tomonori, Nagata, Tetsuya, Geballe, T. R., McCall, Benjamin J., Indriolo, Nick, ...
Infrared absorption lines of H+3, including the metastable R(3,3)l line, have been observed toward eight bright infrared sources associated with hot and massive stars located in and between the...
C. H. Bester, M. Johnson, B. Lopez, T. R. Geballe
A visibility curve of IK Tau has been measured with the ISI, an 11 km stellar interferometer, over a period of several years. Time variations in 11 km ux were also measured. The results indicate an...
J. D. Monnier, M. Bester, W. C. Danchi, M. A. Johnson, E. A. Lipman, C. H. Townes, ...
Measurements by the University of California Berkeley Infrared Spatial Interferometer at 11.15 m have yielded strong evidence for multiple dust shells and/or significant asymmetric dust emission...
Michael A. Strauss, Xiaohui Fan, James E. Gunn, S. K. Leggett, T. R. Geballe, Jeffrey R. Pier, ...
We report the discovery of the coolest field dwarf yet known, selected as an unresolved object with extremely red colors from commissioning imaging data of the Sloan Digital Sky Survey. Its spectrum...
Mid-infrared spectra of late-type stars: Long-term evolution (2007)
Monnier Geballe, J. D. Monnier, T. R. Geballe, W. C. Danchi
Recent ground-based mid-infrared spectra of 29 late-type stars, most with substantial dust shells, are compared to ground-based spectra of these stars from the 1960s and 1970s and to IRAS-LRS spectra...
Michael G. Burton, M. Bulmer, A. Moorhouse, T. R. Geballe
SUMMARY Over 30 lines from the v=3--0, 4--1, 7--3 and 8--4 vibrational series of the hydrogen molecule have been observed from = 7600--8800 A in the reflection nebula NGC 2023, originating from...
To be submitted to Monthly notices
Michael G. Burton, J. E. Howe, T. R. Geballe
Spectra from 1 to 2.5 m, at 230--430 spectral resolution, are presented of the fluorescent molecular hydrogen line emission from two locations in the reflection nebula NGC 2023. Over 100 H 2 lines...
Monthly Notices of the Royal Astronomical Society (2007)
Five emission lines of molecular hydrogen, with wavelengths in the range from 2.10-2.25m and 3.80-3.85m, have been observed in four objects of different type in which the line emission is believed to...
A. Moorhouse, P. F. Roche, T. R. Geballe
Images have been obtained of the (fluorescent) molecular hydrogen 1--0 S(1) line, and of the 3.3 m emission feature, in Orion's Bar and three reflection nebulae. The emission from these species...
Velocity profiles of high excitation molecular hydrogen lines A. Moorhouse,
A. Moorhouse, T. R. Geballe, M. Bird, R. Wade
1 Column densities of molecular hydrogen have been calculated from nineteen infrared vibrationrotation and pure rotational line intensities measured at Peak 1 of the Orion molecular outflow. These...
Antonio Chrysostomou, Michael G. Burton, David J. Axon, J. H Hough, Joss Bland-hawthorn, ...
molecular hydrogen emission in OMC-1
Shocked molecular hydrogen in the bipolar outflow NGC 2071 (2007)
T. R. Geballe, Michael G. Burton, Michael G. Burton
Summary Emission from the v=1--0 S(1) line of molecular hydrogen has been mapped in the bipolar outflow NGC 2071. The line emission peaks at 6 positions distributed irregularly along the two lobes,...
W51 IRS 2: A Massive Jet Emerging from a Molecular Cloud into an H II Region (2007)
Lacy, J. H., Jaffe, D. T., Zhu, Q., Richter, M. J., Bitner, M. A., Greathouse, T. K., ...
We have mapped [Ne II] (12.8um) and [S IV] (10.5um) emission from W51 IRS 2 with TEXES on Gemini North, and we compare these data to VLA free-free observations and VLT near-infrared images. With 0.5"...
SPECTROSCOPY OF H$_3^+$ AND CO TOWARD THE GALACTIC CENTER (2007)
Oka, T., Morong, Christopher P., Geballe, T. R., Goto, Miwa, Usuda, Tomonori, Usuda, Kumiko S., ...
Author Institution: Dept of Astron. \& Astrophys. and Dept of Chem., Univ. of Chicago; Gemini Observatory, Hilo, Hawaii; Max Planck Institute for Astronomy, Heidelberg, Germany; Subaru Telescope,...
H$_3^+$ IN DIFFUSE INTERSTELLAR CLOUDS: A TRACER FOR THE COSMIC-RAY IONIZATION RATE (2007)
Indriolo, Nicholas, McCall, Benjamin J., Geballe, T. R., Oka, T.
Author Institution: Department of Astronomy and Department of Chemistry, University of Illinois at; Urbana-Champaign, Urbana, IL 61801; Gemini Observatory, Hilo, HI 96720; Department of Astronomy \&...
CH$_3^+$: A NEW TOOL FOR STUDYING THE ENIGMA OF INTERSTELLAR CH$^+$? (2007)
McCall, Benjamin J., Geballe, T. R., Oka, T.
Author Institution: Departments of Chemistry and Astronomy, University of Illinois; at Urbana-Champaign, Urbana, IL 61801; Gemini Observatory, Hilo, HI 96720; Department of Astronomy \& Astrophysics...
Catching a runaway in the Galactic Center: a study of the IRS8 bowshock (2007)
J.R. Roy, K. Volk, R. S. Fisher, T. R. Geballe
In this summary we present early results from our on-going study of the Galactic Center source IRS8.
Measuring the inhomogeneous obscuration of AGN with mid-infrared observations (2007)
M. Elitzur, M. M. Sirocky, M. Nenkova, N. A. Levenson, R. E. Mason, T. R. Geballe
We apply inhomogeneous models of the ob- scuring torus of AGNs, emphasizing the mid- IR observational consequences.
Physical parameters of two very cool T dwarfs (2006)
Saumon, D., Marley, M. S., Leggett, S. K., Geballe, T. R., Stephens, D., Golimowski, D. A., ...
We present new infrared spectra of the T8 brown dwarf 2MASS J04151954-0935066: 2.9-4.1 micron spectra obtained with the Infrared Camera and Spectrograph on the Subaru Telescope, and 5.2-14.5 micron...
Leggett, S. K., Saumon, D., Marley, M. S., Geballe, T. R., Golimowski, D. A., Stephens, D., ...
We present new L' (3.75 um) photometry of six L and T dwarfs, and M' (4.70 um) photometry of ten L and T dwarfs, observed at Gemini Observatory, and new 3.55, 4.49, 5.73 and 7.87 um photometry of...
Seventy-One New L and T Dwarfs from the Sloan Digital Sky Survey (2006)
Chiu, K., Fan, X., Leggett, S. K., Golimowski, D. A., Zheng, W., Geballe, T. R., ...
We present near-infrared observations of 71 newly discovered L and T dwarfs, selected from imaging data of the Sloan Digital Sky Survey (SDSS) using the i-dropout technique. Sixty-five of these...
Yusef-Zadeh, F., Biretta, J., Geballe, T. R.
The Trifid nebula (M20) is a well-known prominent optical HII region trisected by bands of obscuring dust lanes and excited by an O7.5 star HD 164492A. Previous near-IR, mid-IR and radio continuum...
HOT AND DIFFUSE CLOUDS NEAR THE GALACTIC CENTER PROBED BY METASTABLE H$_3^+$ (2005)
Oka, T., Geballe, T. R., Goto, Miwa, Usuda, Tomonori, McCall, Benjamin J.
{T. Oka and E. Epp, ApJ, 613, 349 (2004)
Knapp, G. R., Leggett, S. K., Fan, X., Marley, M. S., Geballe, T. R., Golimowski, D. A.
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...
L' and M' Photometry of Ultracool Dwarfs (2004)
Golimowski, D. A., Leggett, S. K., Marley, M. S., Fan, X., Geballe, T. R., Knapp, G. R., ...
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...
Vrba, F. J., Henden, A. A., Luginbuhl, C. B., Guetter, H. H., Munn, J. A., Canzian, B., ...
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...
Ion winds in Saturn's southern auroral/polar region (2004)
Stallard, T.S., Miller, S., Trafton, L.M., Geballe, T.R., Joseph, R.D.
We present profiles of the line-of-sight (l.o.s.) ionospheric wind velocities in the southern auroral/polar region of Saturn. Our velocities are derived from the measurement of Doppler shifting of...
McCall, Benjamin J., Huneycutt, A. J., Saykally, R. J., Geballe, T. R., Djuric, N., Dunn, G. H., ...
$^{a}$email: bjmccall@astro.berkeley.edu
ABSORPTION LINE SURVEY OF $H_{3}^{+}$ TOWARD THE GALACTIC CENTER (2003)
Goto, Miwa, McCall, Benjamin J., Geballe, T. R., Oka, T., Usuda, Tomonori
Author Institution: Subaru Telescope, 650, North A'ohoku Place, Hilo HI 96720/Institute for Astronomy, University of Hawaii; Department of Chemistry and Department of Astronomy, University of...
OBSERVATIONS OF $H^{+}_{3}$ IN THE DIFFUSE INTERSTELLAR MEDIUM (2002)
McCall, Benjamin J., Geballe, T. R., Hinkle, Kenneth H., Goto, Miwa, Kobayashi, N., Terada, H., ...
$^{a}$ B. J. McCall, T. R. Geballe, K. H. Hinkle, and T. Oka, Science 279, 1910 (1998) $^{b}$ T. R. Geballe, B. J. McCall, K. H. Hinkle, and T. Oka, Astrophysical Journal 522, 338 (1999) $^{c}$ B. J....
Ground-based detection of a vibration-rotation line of HD in Orion (2002)
Geballe, T. R., Ramsay Howat, S. K., Timmermann, R., Bertoldi, F., Mountain, C. M.
The nu = 1-0 R(5) line of HD at 2.46 mum has been detected at the position of brightest line emission of shocked H-2 in the Orion Molecular Cloud. The flux in this HD line, when compared to that of...
Ramsey Howat, S. K., Timmermann, R., Geballe, T. R., Bertoldi, F., Mountain, C. M.
The 2.46 mum upsilon = 1 - 0 R(5) line of deuterated molecular hydrogen (HD) has been detected in the Orion Peak 1 shock emission region, at a surface brightness of (8.5 +/- 2.1) x 10(-9)W...
Unusual Broad Absorption Line Quasars from the Sloan Digital Sky Survey (2002)
Hall, Patrick B., Anderson, Scott F., Strauss, Michael A., York, Donald G., Richards, Gordon T., Fan, Xiaohui, ...
Geballe, T. R., Knapp, G. R., Leggett, S. K., Fan, X., Golimowski, D. A.
We present 0.6-2.5um, R~400 spectra of twenty-seven cool, low luminosity stars and substellar objects. Based on these and previously published spectra we develop a preliminary spectral classification...
$H_{3}^{+}$ IN THE DIFFUSE INTERSTELLAR MEDIUM TOWARD HD183143 (2001)
McCall, Benjamin J., Geballe, T. R., Hinkle, Kenneth H., Evans, N. J., Moriarty-Schieven, G. H., Takano, S., ...
$^{a}$B. J. McCall, T. R. Geballe, K.H. Hinkle and T. Oka Science 279, 1910 1998. $^{b}$T. R. Geballe, B. J. McCall, K. H. Hinkle and T. Oka ApJ.522, 338 1999. $^{c}$J. H. Black Phil. Trans. R. Soc....
The continuing saga of Sakurai's object (V4334 Sgr): dust production and helium line emission (2000)
Tyne, V.H., Eyres, S.P.S., Geballe, T.R., Evans, A., Smalley, B., Duerbeck, H.W., ...
We report further UKIRT spectroscopic observations of Sakurai's object (V4334 Sgr) made in 1999 April/May in the 1-4.75 µm range, and find that the emission is dominated by amorphous carbon at...
The continuing saga of Sakurai's object (V4334 Sgr): dust production and helium line emission (2000)
Tyne, V.H., Eyres, S.P.S., Geballe, T.R., Evans, A., Smalley, B., Duerbeck, H.W., ...
We report further UKIRT spectroscopic observations of Sakurai's object (V4334 Sgr) made in 1999 April/May in the 1-4.75 µm range, and find that the emission is dominated by amorphous carbon at...
Strong helium 10830Å absorption in Sakurai's object (V4334 Sgr) (1999)
Eyres, S.P.S., Smalley, B., Geballe, T.R., Evans, A., Asplund, Martin, Tyne, V.H.
We report the appearance and evolution during 1998 of strong neutral helium ^3S-^3P^o absorption at ~10830Å in Sakurai's Object (V4334 Sgr), which is believed to be a planetary nebula nucleus (PNN)...
The X-Ray, Optical, And Infrared Counterpart To GRB 980703 (1999)
P. M. Vreeswijk, T. J. Galama, A. Owens, T. Oosterbroek, T. R. Geballe, J. Van Paradijs, ...
We report on X-ray, optical, and infrared follow-up observations of GRB 980703. We detect a previously unknown X-ray source in the GRB error box ; assuming a power-law decline, we nd for its decay...
Donald F. Figer, Mark Morris, T. R. Geballe, R. Michael Rich, Eugene Serabyn, Ian S. Mclean, ...
We present new infrared images, obtained with the Hubble Space Telescope (HST) Near-Infrared Camera and Multiobject Spectrometer (NICMOS), and Bra (4.05 km) spectroscopy, obtained using CGS4 on...
Strong helium 10830Å absorption in Sakurai's object (V4334 Sgr) (1999)
Eyres, S.P.S., Smalley, B., Geballe, T.R., Evans, A., Asplund, Martin, Tyne, V.H.
We report the appearance and evolution during 1998 of strong neutral helium ^3S-^3P^o absorption at ~10830Å in Sakurai's Object (V4334 Sgr), which is believed to be a planetary nebula nucleus (PNN)...
OBSERVATION OF $H^{+}_{3}$ IN THE DIFFUSE INTERSTELLAR MEDIUM (1998)
McCall, Benjamin J., Geballe, T. R., Hinkle, Kenneth H., Oka, T.
$^{a}$ Supported by the Fannic and John Hertz Foundation $^{b}$ T.R. Gehalle and T. Oka, Nature 384, 334 (1996) $^{c}$ B.J. McCall, T.R. Geballe, K.H. Hinkle, and T. Oka, Science, in press
DETECTION OF INTERSTELLAR $H^{+}_{3}$ (1997)
$^{m}$T. Oka, {Phil. Trans. R. Soc. Lond}. A303, 543 (1981) $^{n}$T.R. Geballe and T. Oka, {Astrophys. J}. 342, 855 (1989) $^{o}$T.R. Geballe and T. Oka, {Nature} 384, 334 (1996)
OBSERVATION OF INTERSTELLAR $H^{+}_{3}$ (1997)
McCall, Benjamin J., Hinkle, Kenneth H., Geballe, T. R., Oka, T.
$^{a}$Suppoorted by the Fannie and John Hertz Foundation $^{b}$T.R. Geballe and T. Oka, {Nature} 384, 334 (1996)
Velocity Resolved Fabry-Perot Imaging of Molecular Hydrogen Emmission in OMC-1 (1997)
Axon, David J., Hough, J. H., ...
Lipman Monnier, C. H. Tuthill, T. R. Geballe, L. J. Greenhill, D. Cruzale Bes, Lefe Vre, ...
Visibility observations at 11 km of o Ceti have been made with the University of California (Berkeley) Infrared Spatial Interferometer during the time period 1988È1995. The observed visibilities...
J. D. Monnier, T. R. Geballe, W. C. Danchi
New multiepoch, midinfrared (8È13 km) spectrophotometric observations are presented for 30 latetype stars. The observations were collected over a4yrperiod (1994È1997), permitting an investigation...
M. Johnson, B. Lopez, T. R. Geballe
A visibility curve of IK Tau has been measured with the ISI, an 11 km stellar interferometer, over a period of several years. Time variations in 11 km Ñux were also measured. The results indicate an...
$^{a}$T. R. Geballe, M.-F. Jagod, and T. Oka, Astrophys, J. 408, L109-L112 (1993).$^{b}$J.-P. Maillard, P. Drossart, J. K. G. Watson, S. J. Kim, J. Caldwell, Astrophys. J. 363, L37-L41 (1990).
J. D. Monnier, M. Bester, W. C. Danchi, M. A. Johnson, E. A. Lipman, C. H. Townes, ...
Measurements by the University of California Berkeley Infrared Spatial Interferometer at 11.15 km have yielded strong evidence for multiple dust shells and/or signiÐcant asymmetric dust emission...
P. G. Tuthill, C. H. Townes, C. G. Degiacomi, T. R. Geballe, L. J. Greenhill, P. Cruzale Bes, ...
Visibility observations at 11 km of o Ceti have been made with the University of California (Berkeley) Infrared Spatial Interferometer during the time period 1988È1995. The observed visibilities...
Achilleos, N., Geballe, T. R., Miller, S., Oka, T., Trafton, L. M.
Author Institution: University College London, London, WCIE 6BT, United Kingdom; Joint Astronomy Centre, 660 N. A'ohōkū Place, University Park, Hilo, HI 96720.; The University of Chicago, Chicago,...
$^{1}$. L. Trafton, D. F. Lester, and K. L. Thompson, Astrophys. J. 343, L73 (1989). $^{2}$. P. Drossart, J.-P. Maillard, J. Caldwell, S. J. Kim, J. K. G. Watson, W. A. Majewski, J. Tennyson, S....
OBSERVATION OF THE $4 \mu m$ FUNDAMENTAL $\nu_{2}$ BAND OF $H_{3}{^{+}}$ IN JUPITER (1990)
$^{1}$ J.P. Maillard and P. Drossart, CFHT Bull. 20, 13 (1989). $^{2}$ L. Trafton, D.F. Lester and K.L. Thompson, Ap. J. 343, L73 (1989). $^{3}$ P. Drossart, J.-P. Maillard, J. Caldwell, S.J. Kim,...