Search Publications
Newly Identified Star Clusters in M33. II. Radial Hubble Space Telescope/Advanced Camera for Surveys Fields
Sarajedini, Ata; Holtzman, Jon A.; Garnett, Donald R. +1 more
We present integrated photometry and color-magnitude diagrams (CMDs) for 161 star clusters in M33, of which 115 were previously uncataloged, using the Advanced Camera For Surveys Wide Field Channel onboard the Hubble Space Telescope. The integrated V-band magnitudes of these clusters range from MV ~-9 to as faint as MV ~-4, e…
SCP 06F6: A Carbon-rich Extragalactic Transient at Redshift z sime 0.14?
Wheatley, Peter J.; Gänsicke, Boris T.; Marsh, Thomas R. +1 more
We show that the spectrum of the unusual transient SCP 06F6 is consistent with emission from a cool, optically thick and carbon-rich atmosphere if the transient is located at a redshift of z ≈ 0.14. The implied extragalactic nature of the transient rules out novae, shell flashes, and V838 Mon-like events as causes of the observed brightening. The …
Hubble Space Telescope Discovery of a z = 3.9 Multiply Imaged Galaxy Behind the Complex Cluster Lens Warps J1415.1+36 at z = 1.026
Gladders, M. D.; Huang, X.; Lidman, C. +27 more
We report the discovery of a multiply lensed Lyα emitter at z = 3.90 behind the massive cluster WARPS J1415.1+3612 at z = 1.026. Images taken by the Hubble Space Telescope using the Advanced Camera for Surveys reveal a complex lensing system that produces a prominent, highly magnified arc and a triplet of smaller arcs grouped tightly around a spec…
AKARI Infrared Observations of the Supernova Remnant G292.0+1.8: Unveiling Circumstellar Medium and Supernova Ejecta
Onaka, Takashi; Jeong, Woong-Seob; Koo, Bon-Chul +6 more
We present the results of AKARI observations of the O-rich supernova remnant (SNR) G292.0+1.8 using six Infrared Camera (IRC) and four Far-Infrared Surveyor bands covering 2.7-26.5 µm and 50-180 µm, respectively. The AKARI images show two prominent structures; a bright equatorial ring (ER) structure along the east-west direction and an…
Suzaku Detection of Superhard X-Ray Emission from the Classical Nova V2491 Cygni
Mukai, K.; Ness, J. -U.; Takahashi, H. +4 more
We report the detection of superhard (>10 keV) X-ray emission extending up to 70 keV from the classical nova V2491 Cygni using the Suzaku observatory. We conducted two ~20 ks target-of-opportunity observations 9 and 29 days after the outburst on 2008 April 11, yielding wide energy range spectra by combining the X-ray Imaging Spectrometer and th…
Expanding the Search for Galaxies at z ~ 7-10 with New NICMOS Parallel Fields
Giavalisco, Mauro; Teplitz, Harry I.; Siana, Brian +7 more
We have carried out a search for galaxies at z ~ 7-10 in ~14.4 arcmin2 of new NICMOS parallel imaging taken in the Great Observatories Origins Deep Survey (5.9 arcmin2), the Cosmic Origins Survey (7.2 arcmin2), and SSA22 (1.3 arcmin2). These images reach 5σ sensitivities of J 110 = 26.0-27.5 (…
NICMOS Photometry of the Unusual Dwarf Planet Haumea and its Satellites
Brown, M. E.; Fraser, W. C.
We present here Hubble Space Telescope NICMOS F110W and F160W observations of Haumea, and its two satellites Hi'iaka and Namaka. From the measured (F110W-F160W) colors of -1.208 ± 0.004, -1.48 ± 0.06, and -1.4 ± 0.2 mag for each object, respectively, we infer that the 1.6 µm water-ice absorption feature depths on Hi'iaka and Namaka are at le…
A Multiply Imaged Luminous Infrared Galaxy Behind the Bullet Cluster (1E0657-56)
Bradač, Maruša; Jones, Christine; Gonzalez, Anthony H. +3 more
We present evidence for a Spitzer-selected luminous infrared galaxy (LIRG) behind the Bullet Cluster (1E0657-56). The galaxy, originally identified as a multiply imaged source using Infrared Array Camera (IRAC) photometry, has a spectral energy distribution consistent with a highly extincted (AV ~ 3.3), strongly star forming galaxy at z…
Surface Alfvén Wave Damping in a Three-Dimensional Simulation of the Solar Wind
Gombosi, T. I.; Opher, M.; Jatenco-Pereira, V. +1 more
Here we investigate the contribution of surface Alfvén wave damping to the heating of the solar wind in minima conditions. These waves are present in the regions of strong inhomogeneities in density or magnetic field (e.g., the border between open and closed magnetic field lines). Using a three-dimensional (3D) magnetohydrodynamics (MHD) model, we…
Suzaku Observations of the Dwarf Nova V893 Scorpii: The Discovery of a Partial X-ray Eclipse
Mukai, K.; Still, M.; Zietsman, E.
V893 Sco is an eclipsing dwarf nova that had attracted little attention from X-ray astronomers until it was proposed as the identification of an Rossi X-Ray Timing Explorer all-sky slew survey (XSS) source. Here, we report on the pointed X-ray observations of this object using Suzaku. V893 Sco was in quiescence at the time, as indicated by the coo…