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Balmer and Metal Absorption Feature Gradients in M32
Worthey, Guy
New data sources are used to assess Lick/IDS feature strength gradients inside the half-light radius Re of the compact Local Group elliptical galaxy M32. A Hubble Space Telescope (HST) STIS spectrum seemed to indicate ionized gas and a very young central stellar population. In fact, this conclusion is entirely spurious because of incomp…
Line profile characteristics of solar explosive event bursts
Solanki, S. K.; Innes, D. E.; Ning, Z.
The spatial structure and temporal evolution of explosive events are explored using spectral observations of the Si IV 1393 Å line obtained with the Solar Ultraviolet Measurements of Emitted Radiation spectrograph (SUMER). Three areas of quiet Sun near disk center, 8 arcsec×120 arcsec each, were rastered with a cadence of less than 1 min for a per…
Molecular Gas around the Double Nucleus in M83
Iono, Daisuke; Matsushita, Satoki; Peck, Alison B. +2 more
The center of M83, a barred starburst galaxy with a double nucleus, has been observed in the CO (J=2-1) and CO (J=3-2) lines with the Submillimeter Array. The molecular gas shows a distribution and kinematics typical for barred galaxies at ~1 kpc radii but reveals unusual kinematics around the double nucleus in the central ~300 pc. Our CO velocity…
On the altitude dependence of transversely heated O distributions in the cusp/cleft
Klecker, B.; Rème, H.; Kistler, L. +5 more
Available from http://www.copernicus.org/site/EGU/annales/22/5/1787.htm?FrameEngine=false;
The Evolution of Early-Type Field Galaxies Selected from a NICMOS Map of the Hubble Deep Field North
Dickinson, Mark; Ferguson, Henry C.; Lucas, Ray A. +5 more
The redshift distribution of well-defined samples of distant early-type galaxies offers a means to test the predictions of monolithic and hierarchical galaxy formation scenarios. NICMOS maps of the entire Hubble Deep Field North (HDF-N) in the F110W and F160W filters, when combined with the available Wide Field Planetary Camera 2 (WFPC2) data, all…
Cluster survey of the high-altitude cusp properties: a three-year statistical study
Fedorov, A.; Budnik, E.; Grigoriev, A. +6 more
Available from http://www.copernicus.org/site/EGU/annales/22/8/3009.htm?FrameEngine=false;
New values of gravitational moments J2 and J4 deduced from helioseismology
Provost, J.; Berthomieu, G.; Irbah, A. +2 more
By applying the theory of slowly rotating stars to the Sun, the solar quadrupole and octopole moments J2 and J4 were computed using a solar model obtained from CESAM stellar evolution code (Morel, 1997) combined with a recent model of solar differential rotation deduced from helioseismology (Corbard et al., 2002). This model …
Nuclear stellar discs in low-luminosity elliptical galaxies: NGC 4458 and 4478
Halliday, C.; Saglia, R. P.; Morelli, L. +7 more
We present the detection of nuclear stellar discs in the low-luminosity elliptical galaxies, NGC 4458 and 4478, which are known to host a kinematically decoupled core. Using archival Hubble Space Telescope imaging, and available absorption line-strength index data based on ground-based spectroscopy, we investigate the photometric parameters and th…
Absolute Flux Distribution of the SDSS Standard BD +17°4708
Bohlin, R. C.; Gilliland, R. L.
Secondary flux standards are established by measuring their brightness relative to primary standard stars. The Hubble Space Telescope (HST) primary standards are the three pure-hydrogen white dwarf (WD) flux standards that determine the sensitivity calibration for the Space Telescope Imaging Spectrograph. STIS observations have defined the flux of…
Radio Metric Observations of Quiescent Filament Cavities
Marqué, C.
We present in this paper a systematic study of the filament environment in the metric radio range, describing the existence of brightness temperature depressions above quiescent filaments on the disk and on the limb. Using the upgraded Nançay Radioheliograph, Hα data from Meudon Observatory, and EIT and LASCO data from SOHO, we estimate the bright…