Search Publications
The Kinematics of Morphologically Selected z~2 Galaxies in the GOODS-North Field
Pettini, Max; Erb, Dawn K.; Shapley, Alice E. +2 more
We present near-IR spectra of Hα emission from 13 galaxies at z~2 in the Great Observatories Origins Deep Survey-North (GOODS-N) field. The galaxies were selected primarily because they appear to have elongated morphologies, and slits were aligned with the major axes (as determined from the rest-frame UV emission) of 11 of the 13. If the galaxies …
Wavelet Phase Coherence Analysis: Application to a Quiet-Sun Magnetic Element
Judge, Philip G.; Lites, Bruce W.; Mathioudakis, Mihalis +3 more
A new application of wavelet analysis is presented that utilizes the inherent phase information residing within the complex Morlet transform. The technique is applied to a weak solar magnetic network region, and the temporal variation of phase difference between TRACE 1700 Å and SOHO/SUMER C II 1037 Å intensities is shown. We present, for the firs…
Kinematics and Ultraviolet to Infrared Morphology of the Inner Homunculus of η Carinae
Corcoran, Michael F.; Walborn, Nolan R.; Hamann, Fred +12 more
We present the first ultraviolet and optical images of η Car and its circumstellar Homunculus nebula, obtained with the Advanced Camera for Surveys/High Resolution Camera (ACS/HRC) on board the Hubble Space Telescope (HST). Compared to those at visual wavelengths, UV images reveal excess emission 0.1"-0.6" from the central source along the minor a…
Formation and evolution of S0 galaxies: a SAURON case study of NGC 7332
Bacon, Roland; Emsellem, Eric; Peletier, Reynier F. +8 more
We present SAURON integral-field observations of the S0 galaxy NGC 7332. Existing broad-band ground-based and Hubble Space Telescope (HST) photometry reveals a double-disc structure and a boxy bulge interpreted as a bar viewed close to edge-on. The SAURON two-dimensional stellar kinematic maps confirm the existence of the bar and inner disc but al…
Cluster observations of hot flow anomalies
Balogh, A.; Dandouras, I.; RèMe, H. +2 more
On 2 April 2002, Cluster entered the solar wind at high northern latitudes and observed a series of disturbances upstream of the bow shock. We suggest that these were signatures of a sequence of hot flow anomalies (HFAs), observed at different stages of development. We estimate the orientation and motion of the HFAs and structures within them usin…
The ubiquitous nature of the horizontal branch second U-jump. A link with the Blue Hook scenario?
Recio-Blanco, A.; De Angeli, F.; Momany, Y. +5 more
In a previous paper we reported on a discontinuity in the extreme horizontal branch (EHB) of the Galactic globular cluster NGC 6752, which we called the second U-jump. This feature was attributed to a combination of post zero-age horizontal branch evolution and diffusion effects. In this follow-up study we analyze other EHB clusters and show that …
A Resolved Debris Disk around the G2 V Star HD 107146
Ford, H. C.; Williams, J. P.; Illingworth, G. D. +6 more
We present resolved scattered-light images of the debris disk around HD 107146, a G2 star 28.5 pc from the Sun. This is the first debris disk to be resolved in scattered light around a solar-type star. We observed it with the Hubble Space Telescope/Advanced Camera for Surveys coronagraph, using a 1.8" occulting spot and the F606W (broad V) and F81…
Multi-site, multi-technique survey of γ Doradus candidates. I. Spectroscopic results for 59 stars
Poretti, E.; Garrido, R.; Rodríguez, E. +14 more
We present the first results of a 2-year high-resolution spectroscopy campaign of 59 candidate γ Doradus stars which were mainly discovered from the HIPPARCOS astrometric mission. More than 60% of the stars present line profile variations which can be interpreted as due to pulsation related to γ Doradus stars. For all stars we also derived the pro…
The N Enrichment and Supernova Ejection of the Runaway Microquasar LS 5039
Kaper, L.; Gies, D. R.; Huang, W. +3 more
We present an investigation of new optical and ultraviolet spectra of the mass donor star in the massive X-ray binary LS 5039. The optical band spectral line strengths indicate that the atmosphere is N-rich and C-poor, and we classify the stellar spectrum as type ON6.5 V((f)). The N-strong and C-weak pattern is also found in the stellar wind P Cyg…
Retrievals of jovian tropospheric phosphine from Cassini/CIRS
Irwin, P. G. J.; Calcutt, S. B.; Taylor, F. W. +4 more
On December 30th, 2000, the Cassini-Huygens spacecraft reached the perijove milestone on its continuing journey to the Saturnian System. During an extended six-month encounter, the Composite Infrared Spectrometer (CIRS) returned spectra of the jovian atmosphere, rings and satellites from 10-1400 cm -1 (1000-7 µm) at a programmable…