A Star in the M31 Giant Stream: the Highest Negative Stellar Velocity Known (2009)
Caldwell, N., Morrison, H., Kenyon, S. J., Schiavon, R., Harding, P., Rose, J. A.
We report on a single star, B030D, observed as part of a large survey of objects in M31, which has the unusual radial velocity of -780 km/s. Based on details of its spectrum, we find that the star is...
The Discovery of Binary White Dwarfs that will Merge within 500 Myr (2009)
Kilic, Mukremin, Brown, Warren R., Prieto, Carlos Allende, Kenyon, S. J.
We present radial velocity observations of four extremely low-mass (0.2 Msol) white dwarfs. All four stars show peak-to-peak radial velocity variations of 540 - 710 km/s with 1.0 - 5.9 hr periods....
Pre-main sequence stars in the Cepheus flare region (2009)
Kun, M., Balog, Z., Kenyon, S. J., Mamajek, E. E., Gutermuth, R. A.
We present results of optical spectroscopic and BVR_CI_C photometric observations of 77 pre-main sequence (PMS) stars in the Cepheus flare region. A total of 64 of these are newly confirmed PMS...
Morales, Farisa Y., Werner, M. W., Bryden, G., Plavchan, P., Stapelfeldt, K. R., Rieke, G. H., ...
Using the Spitzer/Infrared Spectrograph (IRS) low-resolution modules covering wavelengths from 5 to 35 μm, we observed 52 main-sequence A and late B type stars previously seen using...
Lynds 1622: a nearby star forming cloud projected on Orion B? (2008)
Kun, M., Balog, Z., Mizuno, N., Kawamura, A., Gaspar, A., Kenyon, S. J., ...
We present results of optical spectroscopic and photometric observation of the pre-main sequence stars associated with the cometary shaped dark cloud Lynds 1622, and 12CO and 13CO observations of the...
Dusty Cometary Globules in W5 (2008)
Koenig, X. P., Allen, L. E., Kenyon, S. J., Su, K. Y. L., Balog, Z.
We report the discovery of four dusty cometary tails around low mass stars in two young clusters belonging to the W5 star forming region. Fits to the observed emission profiles from 24 micron...
Hypervelocity Stars: From the Galactic Center to the Halo (2008)
Kenyon, S. J., Bromley, B. C., Geller, M. J., Brown, W. R.
Hypervelocity stars (HVS) traverse the Galaxy from the central black hole to the outer halo. We show that the Galactic potential within 200 pc acts as a high pass filter preventing low velocity HVS...
The Discovery of a Companion to the Lowest Mass White Dwarf (2007)
Kilic, Mukremin, Brown, Warren R., Prieto, Carlos Allende, Pinsonneault, M. H., Kenyon, S. J.
We report the detection of a radial velocity companion to SDSS J091709.55+463821.8, the lowest mass white dwarf currently known with M~0.17Msun. The radial velocity of the white dwarf shows...
Currie, Thayne, Balog, Zoltan, Kenyon, S. J., Rieke, G., Prato, L., Young, E. T., ...
We describe IRAC 3.6-8 mu_m observations and ground-based near-IR JHKs photometry from Mimir and 2MASS of the massive double cluster h & chi Persei complete to J=15.5 (M ~ 1.3 Msun. Within 25' of the...
Sokoloski, J. L., Kenyon, S. J., Espey, B. R., Keyes, Charles D., McCandliss, S. R., Kong, A. K. H., ...
We describe observational evidence for a new kind of interacting-binary-star outburst that involves both an accretion instability and an increase in thermonuclear shell burning on the surface of an...
Sokoloski, J. L., Kenyon, S. J., Kong, A. K. H., Espey, B. R., McCandliss, S. R., Keyes, C. D., ...
We performed extensive, multi-wavelength observations of the prototypical symbiotic star Z Andromedae between 2000 and 2003, during a large eruption. The rise to optical maximum occurred in three...
Balog, Z., Kenyon, S. J., Lada, E. A., Barsony, M., Vinko, J., Gaspar, A.
We describe the results of two near infrared (K-band) imaging surveys and a three color (JHK) survey of the vicinity of NGC 7538. The limiting magnitudes are K ~ 16.5 and K ~ 17.5 mag for the K-band...
FUSE Observations of the Symbiotic Star AG Draconis (2004)
Young, P. R., Dupree, A. K., Espey, B. R., Kenyon, S. J., Ake, T. B.
Spectra of the bright symbiotic star AG Draconis (BD+67D922) in the wavelength range 905-1187 A obtained with the Far Ultraviolet Spectroscopic Explorer (FUSE) are presented. The spectra show a...
Jets from accreting white dwarfs (2004)
Brocksopp , C., Kaiser , C. R., Kellogg , E. M., Kenyon , S. J., Sokoloski , J. L.
Los ujos colimados procedentes de los discos de acreción de las enanas blancas juegan un papel muy importante al estudiar los jets" en astrofìsica.
Surveying the Inner Halo of the Galaxy with 2MASS-Selected Horizontal Branch Candidates (2003)
Brown, Warren R., Geller, M. J., Kenyon, S. J., Beers, T. C., Kurtz, M. J., Roll, J. B.
We use 2MASS photometry to select blue horizontal branch (BHB) candidates covering the sky |b|>15 deg. A 12.5
The Century Survey Galactic Halo Project I: Stellar Spectral Analysis (2003)
Brown, W. R., Prieto, C. Allende, Beers, T. C., Wilhelm, R., Geller, M. J., Kenyon, S. J., ...
The Century Survey Galactic Halo Project is a photometric and spectroscopic survey from which we select relatively blue stars (V-R
CH Cygni I: Observational Evidence for a Disk-Jet Connection (2002)
Sokoloski, J. L., Kenyon, S. J.
We investigate the role of accretion in the production of jets in the symbiotic star CH Cygni. Assuming that the rapid stochastic optical variations in CH Cygni come from the accretion disk, as in...
CH Cygni II: Optical Flickering from an Unstable Disk (2002)
Sokoloski, J. L., Kenyon, S. J.
CH Cygni began producing rapid, stochastic optical variations with the onset of symbiotic activity in 1963. We use changes in this flickering between 1997 and 2000 to diagnose the state of the...
Correlated radial velocity and X-ray variations in HD 154791/4U 1700+24 (2002)
Galloway, D. K., Sokoloski, J. L., Kenyon, S. J.
We present evidence for approximately 400-d variations in the radial velocity of HD 154791 (V934 Her), the suggested optical counterpart of 4U 1700+24. The variations are correlated with the...
Sokoloski, J. L., Kenyon, S. J., Kong, A. K. H., Charles, P. A., Kaiser, C. R., Seymour, N., ...
We describe the first results from a program of multi-wavelength monitoring of symbiotic binary stars in outburst. The prototypical symbiotic star Z Andromedae was observed extensively at radio,...
A Near-Infrared Imaging Survey of the Chamaeleon I Dark Cloud (2000)
We describe a near-infrared imaging survey covering approximately 1 square deg of the Chamaeleon I dark cloud. The survey is complete for K < 15.0, H < 16.0, and J < 16.5, roughly two magnitudes more...
An Optical Study of BG Geminorum: An Ellipsoidal Binary with an Unseen Primar Star (1999)
Benson, P. J., Dullighan, A., Bonanos, A., McLeod, K. K., Kenyon, S. J.
We describe optical photometric and spectroscopic observations of the bright variable BG Geminorum. Optical photometry shows a pronounced ellipsoidal variation of the K0 I secondary, with amplitudes...
We analyze the ultraviolet spectrum of the cataclysmic variable GK Per at maximum light. The flat ultraviolet spectrum in this system requires a truncated inner accretion disk and an unusually flat...
The physical nature of the symbiotic stars / (1983)
Thesis (Ph. D.)--University of Illinois at Urbana-Champaign, 1983.
Thorn, R M, Gupta, P, Kenyon, S J, Ferrer, J F
Cattle lymphocytes cultured for 3 days were found to spontaneously incorporate thymidine (3STI). Under optimal conditions of culture, the median magnitude of 3STI activity in lymphocytes from bovine...
Cellular basis of persistent lymphocytosis in cattle infected with bovine leukemia virus.
Peripheral blood lymphocytes from 14 cattle infected with the bovine leukemia virus (BLV) and 14 BLV-free cattle were examined by the membrane immunofluorescent antibody technique to detect surface...
Discontinuous bovine serum albumin gradients were used to fractionate peripheral blood leukocytes from bovine leukemia virus (BLV)-free and BLV-infected cows. The release of infectious BLV and...
Thorn, R M, Gupta, P, Kenyon, S J, Ferrer, J F
Cattle lymphocytes cultured for 3 days were found to spontaneously incorporate thymidine (3STI). Under optimal conditions of culture, the median magnitude of 3STI activity in lymphocytes from bovine...
Cellular basis of persistent lymphocytosis in cattle infected with bovine leukemia virus.
Peripheral blood lymphocytes from 14 cattle infected with the bovine leukemia virus (BLV) and 14 BLV-free cattle were examined by the membrane immunofluorescent antibody technique to detect surface...
Discontinuous bovine serum albumin gradients were used to fractionate peripheral blood leukocytes from bovine leukemia virus (BLV)-free and BLV-infected cows. The release of infectious BLV and...