Science Archives Publication System

Observations of molecular oxygen ions in Saturn's inner magnetosphere

DOI: 10.1029/2008GL035433 Bibcode: 2008GeoRL..3520103M

Johnson, Robert E.; Smith, H. Todd; Martens, Hilary R. +2 more

We present an analysis of molecular oxygen ion (O₂ ⁺) abundance in Saturn's inner magnetosphere based on observations made with the Cassini Plasma Spectrometer (CAPS). Using data summed over 23 orbits, we resolve and isolate O₂ ⁺ counts from the tail of the water group ion mass distribution (W⁺

2008 • Geophysical Research Letters

Cassini 33

Observed tail current systems associated with bursty bulk flows and auroral streamers during a period of multiple substorms

DOI: 10.5194/angeo-26-167-2008 Bibcode: 2008AnGeo..26..167F

Dandouras, I.; Lucek, E.; Fazakerley, A. N. +10 more

We present a multi-instrument study of a substorm bursty bulk flow (BBF) and auroral streamer. During a substorm on 25 August 2003, which was one of a series of substorms that occurred between 00:00 and 05:00 UT, the Cluster spacecraft encountered a BBF event travelling Earthwards and duskwards with a velocity of ~500 km s^-1 some nine m…

2008 • Annales Geophysicae

Cluster 33

The X-ray luminosity of solar-mass stars in the intermediate age open cluster NGC 752

DOI: 10.1051/0004-6361:200810042 Bibcode: 2008A&A...490..113G

Micela, G.; Favata, F.; Giardino, G. +1 more

Aims: While observational evidence shows that most of the decline in a star's X-ray activity occurs between the age of the Hyades (~ 8 × 10⁸ yr) and that of the Sun, very little is known about the evolution of stellar activity between these ages. To gain information on the typical level of coronal activity at a star's intermediate age, …

2008 • Astronomy and Astrophysics

XMM-Newton 33

Emerging Active Regions Studied with Ring-Diagram Analysis

DOI: 10.1086/523998 Bibcode: 2008ApJ...672.1254K

Howe, R.; Komm, R.; Hill, F. +1 more

We study the temporal variation of subsurface flows associated with emerging active regions, focusing on four regions in detail. Two of them, AR 10314 and AR 10488, emerge near disk center and the other two, AR 10365 and AR 10375, are older regions where new flux emerges during their disk passage. We measure the horizontal subsurface flows from hi…

2008 • The Astrophysical Journal

SOHO 33

Triggered or Self-Regulated Star Formation within Intermediate Redshift Luminous Infrared Galaxies. I. Morphologies and Spectral Energy Distributions

DOI: 10.1088/0004-6256/135/4/1207 Bibcode: 2008AJ....135.1207M

Koo, D. C.; Larkin, J. E.; Wright, S. A. +6 more

As part of the Center for Adaptive Optics (AO) Treasury Survey (CATS) we imaged a set of 15 intermediate redshift (z ~ 0.8) luminous infrared (IR) galaxies (LIRGs) with the Keck Laser Guide Star (LGS) AO facility. These galaxies were selected from the Great Observatories Origins Deep Survey (GOODS) southern field, allowing us to combine the high s…

2008 • The Astronomical Journal

eHST 33

Chandra X-Ray Observatory Observations of the Globular Cluster M71

DOI: 10.1086/591899 Bibcode: 2008ApJ...687.1019E

Ransom, Scott M.; Weisskopf, Martin C.; Bogdanov, Slavko +12 more

We observe the nearby, low-density globular cluster M71 (NGC 6838) with the Chandra X-Ray Observatory to study its faint X-ray populations. Five X-ray sources are found inside the cluster core radius, including the known eclipsing binary millisecond pulsar (MSP) PSR J1953+1846A. The X-ray light curve of the source coincident with this MSP shows ma…

2008 • The Astrophysical Journal

eHST 33

Magnetic clouds seen at different locations in the heliosphere

DOI: 10.5194/angeo-26-213-2008 Bibcode: 2008AnGeo..26..213R

Zhukov, A. N.; Rodriguez, L.; Mandrini, C. H. +9 more

We analyze two magnetic clouds (MCs) observed in different points of the heliosphere. The main aim of the present study is to provide a link between the different aspects of this phenomenon, starting with information on the origins of the MCs at the Sun and following by the analysis of in-situ observations at 1 AU and at Ulysses. The candidate sou…

2008 • Annales Geophysicae

SOHO Ulysses 33

A deep INTEGRAL hard X-ray survey of the 3C 273/Coma region

DOI: 10.1051/0004-6361:200809450 Bibcode: 2008A&A...485..707P

Paltani, S.; Walter, R.; Dwelly, T. +3 more

We present an analysis of the deepest hard X-ray survey to date of about 2500 deg² performed by the IBIS instrument on board INTEGRAL in the 20-60 keV band, with a total exposure time of 4 Ms. We find 34 candidate sources, for which we try to find counterparts at other wavelengths. The ratio of Seyfert 1 to Seyfert 2 is significantly mo…

2008 • Astronomy and Astrophysics

INTEGRAL 33

Observation of a tilt of Titan's middle-atmospheric superrotation

DOI: 10.1016/j.icarus.2008.05.014 Bibcode: 2008Icar..197..549A

Nixon, Conor A.; Achterberg, Richard K.; Flasar, F. Michael +2 more

Maps of isotherms on surfaces of constant pressure in Titan's middle atmosphere encircle the poles but show an offset, implying that the mean zonal flow has an axis of symmetry that is tilted relative to the spin axis of the solid body. The effect is seen in both hemispheres around a consistent axis. Periodogram analysis of the temperature field s…

2008 • Icarus

Cassini 33

Mineralogical composition, structure, morphology, and geological history of Aram Chaos crater fill on Mars derived from OMEGA Mars Express data

DOI: 10.1029/2008JE003131 Bibcode: 2008JGRE..11312006M

Le Mouélic, S.; Sotin, C.; Bibring, J. -P. +6 more

Aram Chaos is a crater 280 km in diameter centered at 2.5°N, 338.5°E. It is filled by chaotic terrains overlain by a dome-shaped, layered 900 m thick formation displaying spectral signatures of ferric oxides on Thermal Emission Spectrometer (TES) and Observatoire pour la Mineralogie, L'Eau, les Glaces et L'Activite (OMEGA) medium spatial resolutio…

2008 • Journal of Geophysical Research (Planets)

MEx 33