Search Publications
Missions
Journals
Publication Years
An Atlas of Hubble Space Telescope Spectra and Images of Nearby Spiral Galaxies
Marconi, A.; Capetti, A.; Carollo, C. M. +17 more
We have observed 54 nearby spiral galaxies with the Space Telescope Imaging Spectrograph (STIS) on the Hubble Space Telescope to obtain optical long-slit spectra of nuclear gas disks and STIS optical (~R band) images of the central 5''×5'' of the galaxies. These spectra are being used to determine the velocity field of nuclea…
HST observations of the metal rich globular clusters NGC 6496 and NGC 6352
Covino, S.; Pulone, L.; Paresce, F. +1 more
Deep exposures of the metal-rich globular clusters NGC 6496 and NGC 6352 were obtained with the WFPC2 camera on board the Hubble Space Telescope (HST) through the F606W and F814W filters. The resulting colour-magnitude diagrams (CMD) reach down to absolute magnitude M814 =~ 10-10.5, approximately 5 magnitudes below the main sequence (MS…
The source content of low galactic latitude XMM-Newton surveys
Motch, C.; Guillout, P.; Herent, O.
We present results from a project conducted by the Survey Science Center of the XMM-Newton satellite and aiming at the identification and characterisation of serendipitous EPIC sources at low galactic latitudes. Deep multi-colour optical imaging and spectroscopic observations have been obtained in the framework of several observing campaigns carri…
Interplanetary and solar surface properties of coronal holes observed during solar maximum
Woch, J.; Solanki, S. K.; Forsyth, R. +2 more
Data from the Solar Wind Ion Composition Spectrometer (SWICS) on board the Ulysses spacecraft and synoptic maps from Kitt Peak are used to analyze the relatively short-lived coronal holes which exist during the maximum phase of the solar activity cycle 23. They are compared with the persistent polar coronal holes which prevail around solar minimum…
The X-Ray Properties of the Nearby Star-forming Galaxy IC 342: The XMM-Newton View
Bauer, F. E.; Brandt, W. N.; Lehmer, B.
We present results on the X-ray properties of IC 342 using a 10 ks XMM-Newton observation. Thirty-five sources are detected coincident with the disk of IC 342 (more than tripling the number known), of which ~31 are likely to be intrinsic to IC 342. This point-source population exhibits a diverse range of spectral properties and has an X-ray lumino…
Blue Horizontal-Branch Stars in Old, Metal-rich Stellar Systems
O'Connell, Robert W.; Dorman, Ben; Rood, Robert T. +5 more
Twenty years ago, Burstein et al. recognized that the metal-rich globular clusters in the Andromeda galaxy (M31) exhibited anomalously strong Balmer and CN lines compared to Milky Way clusters. They suggested that younger ages might be the cause, unless blue stars above the main-sequence turnoff or on the horizontal branch were uncommonly prominen…
The far-infrared/radio correlation in the ISO era. The warm and cold far-infrared/radio correlations
Völk, H. J.; Tuffs, R. J.; Pierini, D. +1 more
We present the correlation between the far-infrared (FIR) and radio emissions from a composite sample of 72 nearby normal galaxies observed with the ISOPHOT instrument on board the Infrared Space Observatory. The galaxies in the sample have measurements at three FIR wavelengths (60, 100 and 170 mu m), which allowed a direct determination of the wa…
Asteroid observations with the Hubble Space Telescope. II. Duplicity search and size measurements for 6 asteroids
Lattanzi, M.; Tanga, P.; Cellino, A. +3 more
We present the results of the observations of five Main Belt asteroids and one Trojan obtained using the Fine Guidance Sensors (FGS) of the Hubble Space Telescope. For each object, estimates of the spin axis orientation, angular size and overall shape, as well as possible indications of a binary structure, are derived. This enables the computation…
The Distance to the Large Magellanic Cloud Cluster NGC 1866 and the Surrounding Field
Salaris, M.; Walker, A. R.; Brocato, E. +2 more
We use the main-sequence stars in the LMC cluster NGC 1866 and red clump stars in the local field to obtain two independent estimates of the LMC distance. We apply an empirical main-sequence-fitting technique based on a large sample of subdwarfs with accurate Hipparcos parallaxes in order to estimate the cluster distance modulus, and the multicolo…
The ASCA X-Ray Spectrum of Arp 102B and Evaluation of Simple Models for Its Associated, Metastable Fe II Absorber
Charlton, Jane C.; Eracleous, Michael; Halpern, Jules P.
We have observed the broad-line radio galaxy Arp 102B with ASCA in order to determine the absorbing column density toward its X-ray source and measure its X-ray spectrum. The ultimate goal was to constrain the properties of the medium responsible for the metastable Fe II absorption lines observed in the ultraviolet spectrum of this object. The 0.5…