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The Remarkable Far-Ultraviolet Spectrum of FK Comae Berenices: King of Spin
Ayres, Thomas R.; Redfield, Seth; Harper, Graham M. +4 more
A Far Ultraviolet Spectroscopic Explorer (FUSE) pointing on the ultrafast rotating yellow giant FK Comae Berenices (HD 117555; vsini~163 km s-1) recorded emission profiles of C III λ977 (T~8×104 K) and O VI λ1031 (T~3×105 K) that are exceptionally broad and asymmetric, but nearly identical in shape, aside from a bl…
A Soft X-Ray Transient in the M31 Bulge
Williams, Benjamin F.; McClintock, Jeffrey E.; Murray, Stephen S. +2 more
We have examined a probable soft X-ray transient source in the M31 bulge at R.A.=0h42m41.814s+/-0.08", decl.=41deg16'35.86"+/-0.07". On the three occasions we observed the source, its spectrum was soft (kTin~1 keV). The brightest detection of the source was on 2004 July 17, with a 0.3-7 keV lu…
The Bright Ages Survey. II. Evolution of Luminosity, Dust Extinction, and Star Formation from z=0.5 to z=2.5
Rich, R. Michael; Malkan, Matthew A.; Colbert, James W.
The Bright Ages Survey is a K-band-selected redshift survey over six separate fields with UBVRIzJHK imaging covering a total of 75.6 arcmin 2 and reaching K=20-20.5. Two fields have deep HST imaging, while all are centered on possible overdensities in the z~2 range. Here we report photometric redshifts and spectroscopy for this sample, …
An Optical-Infrared Jet in 3C 133
O'Dea, Christopher P.; Baum, Stefi; Chiaberge, Marco +10 more
We report the discovery of a new optical-IR synchrotron jet in the radio galaxy 3C 133 from our HST NICMOS snapshot survey. The jet and eastern hot spot are well resolved and visible at both optical and IR wavelengths. The IR jet follows the morphology of the inner part of the radio jet, with three distinct knots identified with features in the ra…
On the Spiral Structure of NGC 5248: An Analytic Approach
Yuan, Chi; Yang, Chao-Chin
An improved nonlinear asymptotic theory of spiral density waves is developed. It extends the theory developed by Yuan & Kuo to a global theory, not just one limited to the vicinity of the resonance. It can then be applied to the recent high-resolution observations of CO and HST NICMOS of nearby spiral galaxies. As an example, we apply the theo…
Direct Observation of Low Coronal Breakout: Does Breakout Precede or Follow Solar Eruption?
Cho, K. -S.; Moon, Y. -J.; Choe, G. S. +3 more
In this Letter, we report a direct SOHO LASCO C1 observation of low coronal ``magnetic breakout'' that occurred during the coronal mass ejection (CME) on 1998 March 23. The LASCO C1 images show that a slowly expanding, small coronal loop on the northeastern limb erupted, becoming a CME with the typical three-part structure (core, void, and front).…
Thermal Composition and Doppler Velocities in a Transequatorial Loop at the Solar Limb
Brosius, Jeffrey W.
We observed a transequatorial loop (TEL) connecting NOAA Active Regions 10652 and 10653 at the west solar limb on 2004 July 29 with the Extreme-Ultraviolet Imaging Telescope (EIT) and the Coronal Diagnostic Spectrometer (CDS) aboard the Solar and Heliospheric Observatory. Only the loop's northern leg was observed with CDS. The loop appeared bright…
G0.570-0.018: A Young Supernova Remnant? INTEGRAL and VLA Observations
Terrier, R.; Renaud, M.; Bykov, A. M. +4 more
We report INTEGRAL IBIS γ-ray and VLA radio observations of G0.570-0.018, a diffuse X-ray source recently discovered by ASCA and Chandra in the Galactic center region. Based on its spectrum and morphology, G0.570-0.018 has been proposed to be a very young supernova remnant. In this scenario, the presence of γ-ray lines coming from the short-lived …
Optical and Infrared Nondetection of the z = 10 Galaxy behind Abell 1835
Smith, Graham P.; Egami, Eiichi; Eisenhardt, Peter R. +2 more
Gravitational lensing by massive galaxy clusters is a powerful tool for the discovery and study of high-redshift galaxies, including those at z>=6 likely responsible for cosmic reionization. Pelló et al. recently used this technique to discover a candidate gravitationally magnified galaxy at z=10 behind the massive cluster lens Abell 1835 (z=0.…
Revealing the Mid-Infrared Emission Structure of IRAS 16594-4656 and IRAS 07027-7934
García-Lario, P.; Acosta-Pulido, J. A.; García-Hernández, D. A. +3 more
TIMMI2 diffraction-limited mid-infrared images of a multipolar proto-planetary nebula IRAS 16594-4656 and a young [WC] elliptical planetary nebula IRAS 07027-7934 are presented. Their dust shells are for the first time resolved (only marginally in the case of IRAS 07027-7934) by applying the Lucy-Richardson deconvolution algorithm to the data, tak…