Science Archives Publication System

A Massive Bipolar Outflow and a Dusty Torus with Large Grains in the Preplanetary Nebula IRAS 22036+5306

DOI: 10.1086/508507 Bibcode: 2006ApJ...653.1241S

Sahai, R.; Sánchez Contreras, C.; Patel, N. A. +2 more

We report high angular resolution (~1") CO J=3-2 interferometric mapping using the Submillimeter Array (SMA) of IRAS 22036+5306 (I22036), a bipolar preplanetary nebula (PPN) with knotty jets discovered in our HST snapshot survey of young PPNs. In addition, we have obtained supporting lower resolution (~10") CO and ¹³CO J=1-0 observation…

2006 • The Astrophysical Journal

eHST 42

A strong vortex in Saturn's South Pole

DOI: 10.1016/j.icarus.2006.05.020 Bibcode: 2006Icar..184..524S

Hueso, R.; Sánchez-Lavega, A.; Rojas, J. F. +1 more

Saturn's southern pole was observed at high resolution by the Cassini Imaging Science Subsystem (ISS) during the spacecraft insertion orbit in July 2004. Cloud tracking of individual features on images taken at a wavelength of 938 nm reveal the existence of a strong polar vortex enclosed by a jet with maximum speed of 160±10 ms relative to System …

2006 • Icarus

Cassini eHST 42

The nuclear regions of NGC 7582 from [Ne II] spectroscopy at 12.8 µm - an estimate of the black hole mass

DOI: 10.1051/0004-6361:20053385 Bibcode: 2006A&A...460..449W

Siebenmorgen, R.; Wold, M.; Lacy, M. +1 more

We present a high-resolution (R≈16 000) spectrum and a narrow-band image centered on the [Ne II]12.8 µm line of the central kpc region of the starburst/Seyfert 2 galaxy NGC 7582. The galaxy has a rotating circum-nuclear starburst disk, shown at great detail at a diffraction-limited resolution of 0.4 arcsec (≈ 40 pc). The h…

2006 • Astronomy and Astrophysics

eHST 42

Enceladus: Cosmic Gymnast, Volatile Miniworld

DOI: 10.1126/science.1124495 Bibcode: 2006Sci...311.1389K

Kargel, Jeffrey S.

The exploration of Saturn by the Cassini/Huygens mission has yielded a rich collection of data about the planet and its rings and moons, in particular its small satellite Enceladus and giant satellite Titan. Once believed too small to be active, Enceladus has been found to be one of the most geologically dynamic objects in the solar system. Among …

2006 • Science

Cassini 42

Flux Rope Model of the 2003 October 28-30 Coronal Mass Ejection and Interplanetary Coronal Mass Ejection

DOI: 10.1086/500822 Bibcode: 2006ApJ...642..541K

Chen, J.; Yurchyshyn, V. B.; Skoug, R. M. +2 more

A numerical model of an erupting solar flux rope is shown to reproduce both quantitative near-Sun properties of the 2003 October 28 coronal mass ejection and the timing, strength, and orientation of the fields measured in situ at 1 AU. Using a simple erupting flux rope model, we determine the best-fit parameters for this event. Our analysis shows …

2006 • The Astrophysical Journal

SOHO 41

New Dust Belts of Uranus: One Ring, Two Ring, Red Ring, Blue Ring

DOI: 10.1126/science.1125110 Bibcode: 2006Sci...312...92D

de Pater, Imke; Showalter, Mark R.; Hammel, Heidi B. +1 more

We compared near-infrared observations of the recently discovered outer rings of Uranus with Hubble Space Telescope results. We find that the inner ring, R/2003 U 2, is red, whereas the outer ring, R/2003 U 1, is very blue. Blue is an unusual color for rings; Saturn's enigmatic E ring is the only other known example. By analogy to the E ring, R/20…

2006 • Science

eHST 41

XMM-Newton observation of the Be/neutron star system RX J0146.9+6121: a soft X-ray excess in a low luminosity accreting pulsar

DOI: 10.1051/0004-6361:20065107 Bibcode: 2006A&A...455..283L

Mereghetti, S.; La Palombara, N.

We report on the XMM-Newton observation of the Be/neutron star X-ray binary system RX J0146.9+6121, a long period (~23 m) pulsar in the NGC 663 open cluster. The X-ray luminosity decreased by a factor of two compared to the last observation carried out in 1998, reaching a level of ∼1×10³⁴ erg s^-1, the lowest ever observed in …

2006 • Astronomy and Astrophysics

XMM-Newton 41

Observed Frequency Variations of Solar p-Mode Travel Times as Evidence for Surface Effects in Sunspot Seismology

DOI: 10.1086/507450 Bibcode: 2006ApJ...647L.187B

Birch, A. C.; Braun, D. C.

Using helioseismic holography, we measure acoustic (p-mode) travel-time perturbations, observed within solar active regions, as functions of frequency and phase speed. We find evidence for a frequency variation, at fixed phase speed, of the travel times that has not previously been reported. This variation is not expected from typical sound-speed …

2006 • The Astrophysical Journal

SOHO 41

An ultradeep submillimetre map: beneath the SCUBA confusion limit with lensing and robust source extraction

DOI: 10.1111/j.1365-2966.2006.10138.x Bibcode: 2006MNRAS.368..487K

Smail, I.; Kneib, J. -P.; Ivison, R. J. +7 more

Extracting sources with low signal-to-noise ratio (S/N) from maps with structured background is a non-trivial task which has become important in studying the faint end of the submillimetre (submm) number counts. In this paper, we study the source extraction from submm jiggle-maps from the Submillimetre Common-User Bolometer Array (SCUBA) using the…

2006 • Monthly Notices of the Royal Astronomical Society

eHST 41

Testing the inverse-Compton catastrophe scenario in the intra-day variable blazar S5 0716+71. II. A search for intra-day variability at millimetre wavelengths with the IRAM 30 m telescope

DOI: 10.1051/0004-6361:20054649 Bibcode: 2006A&A...456..117A

Grewing, M.; Britzen, S.; Wagner, S. J. +12 more

We report on a densely time sampled polarimetric flux density monitoring of the BL Lac object S5 0716+71 at 86 GHz and 229 GHz. The source was observed with the IRAM 30 m telescope at Pico Veleta within a coordinated multi-frequency observing campaign, which was centred around a 500 ks INTEGRAL observation during November 10 to …

2006 • Astronomy and Astrophysics

INTEGRAL 41