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H1320+551: a type 1.8/1.9 Seyfert galaxy with an unabsorbed X-ray spectrum
Barcons, X.; Carrera, F. J.; Ceballos, M. T.
We present new optical spectroscopic and XMM-Newton X-ray observations of the active galactic nucleus (AGN) H1320+551. The optical data (consistent with but of better quality than a previously published spectrum) show this source to be a type 1.8/1.9 Seyfert galaxy at z= 0.0653. The narrow-line region is significantly reddened, with a Balmer decre…
Near-IR spectra of ISOGAL sources in the inner Galactic Bulge
Omont, A.; Schultheis, M.; Ojha, D. K. +2 more
We present near-IR spectra (HK-band) of a sample of 107 sources with mid-IR excesses at 7 and 15;mu m detected during the ISOGAL survey. Making use of the DENIS interstellar extinction map from Schultheis et al. (1999) we derive luminosities and find that the Mbol vs. 12CO and M_bol vs. H2O diagrams are powerful to…
What Do the Hubble Space Telescope and Chandra Tell Us about the Jet and the Nuclear Region of the Radio Galaxy 3C 270?
Sparks, William B.; Chiaberge, Marco; Capetti, Alessandro +2 more
The Hubble Space Telescope (HST)/Space Telescope Imaging Spectrograph ultraviolet image of the FR I radio galaxy 3C 270 shows the presence of a jetlike structure emerging from the position of the nucleus. This feature, which represents the first jetlike component ever detected in the UV in a radio galaxy with jets lying almost on the plane of the …
Ulysses observations of solar energetic particles from the 14 July 2000 event at high heliographic latitudes
Giacalone, J.; McKibben, R. B.; Zhang, Ming +4 more
At the time of the solar flare on the Bastille Day of 2000, the Ulysses spacecraft was at 3.17 AU from the Sun, 62° south in heliographic latitude, and 116° in longitude east of the Earth. Solar wind and magnetic field measurements by Ulysses indicate that the coronal mass ejection (CME) of this event had a limited size in both latitude and longit…
Multiwavelength Insights into Mixed-Morphology Binary Galaxies. I. ISOCAM, ISOPHOT, and Hα Imaging
Rampazzo, Roberto; Xu, Cong; Gao, Yu +3 more
We present Hα and ISO mid- and far-IR observations for a sample of mixed-morphology galaxy pairs that reveal both the stellar and nonstellar signatures of the interaction process. A mixed-morphology pair is perhaps the simplest form of galaxy-galaxy interaction because it is expected to involve only a single rapidly rotating gas-rich component pai…
Photometry of pluto in the last decade and before: evidence for volatile transport?
Buratti, B. J.; Heinze, A.; Young, J. +7 more
Photometric observations of Pluto in the BVR filter system were obtained in 1999 and in 1990-1993, and observations in the 0.89-µm methane absorption band were obtained in 2000. Our 1999 observations yield lightcurve amplitudes of 0.30 ± 0.01, 0.26 ± 0.01, and 0.21 ± 0.02 and geometric albedos of 0.44 ± 0.04, 0.52 ± 0.03, and 0.58 ± 0.02 in …
Warm Molecular Hydrogen and Ionized Neon in the HH 2 Outflow
Cernicharo, J.; Noriega-Crespo, A.; Cesarsky, D. +3 more
We report on spectro-imaging observations of the Herbig-Haro 2 outflow with the ISOCAM camera on board the Infrared Space Observatory. The [Ne II] 12.81 µm and [Ne III] 15.55 µm lines are detected only toward the jet working surface (HH 2H), consistent with the high excitation of this knot in the optical range, while H2 pure…
Hubble Space Telescope Space Telescope Imaging Spectrograph Spectroscopy of the Intermediate Polar EX Hydrae
Szkody, Paula; Howell, Steve B.; Sion, Edward M. +2 more
We present the results of our analysis of six orbits of Hubble Space Telescope Space Telescope Imaging Spectrograph (HST/STIS) time-tagged spectroscopy of the intermediate polar, EX Hydrae. The high time and wavelength resolution of the HST/STIS spectra provided an excellent opportunity to study the UV properties of EX Hya. Measurements of the con…
The Kinematics and Physical Conditions of the Ionized Gas in Markarian 509. II. STIS Echelle Observations
Turner, T. J.; Kraemer, S. B.; Crenshaw, D. M. +5 more
We present observations of the UV absorption lines in the luminous Seyfert 1 galaxy Mrk 509, obtained with the medium-resolution (λ/Δλ~40,000) echelle gratings of the Space Telescope Imaging Spectrograph on the Hubble Space Telescope. The spectra reveal the presence of eight kinematic components of absorption in Lyα, C IV, and N V, at radial veloc…
On the link between rotation, chromospheric activity and Li abundance in subgiant stars
De Medeiros, J. R.; Canto Martins, B. L.; Melo, C. H. F. +2 more
The connection rotation-CaII emission flux-lithium abundance is analyzed for a sample of bona fide subgiant stars, with evolutionary status determined from HIPPARCOS trigonometric parallax measurements and from the Toulouse-Geneva code. The distribution of rotation and CaII emission flux as a function of effective temperature shows a discontinuity…