Science Archives Publication System

Albedo, Size, and Surface Characteristics of Hayabusa-2 Sample-Return Target 162173 1999 JU3 from AKARI and Subaru Observations

DOI: 10.1093/pasj/60.sp2.S399 Bibcode: 2008PASJ...60S.399H

Müller, T. G.; Wada, T.; Ita, Y. +7 more

2008 • Publications of the Astronomical Society of Japan

AKARI 55

Searching for mid-IR obscured AGN in the Chandra deep field North

DOI: 10.1051/0004-6361:20078790 Bibcode: 2008A&A...484..671G

Georgakakis, A.; Georgantopoulos, I.; Rovilos, E. +1 more

The efficiency of mid-infrared selection methods for finding obscured AGN is investigated using data in the Chandra Deep Field North. It is shown that samples of AGN candidates compiled on the basis of mid-infrared colours only suffer substantial contamination from normal galaxies. X-ray stacking analysis reveals a soft mean X-ray spectrum for the…

2008 • Astronomy and Astrophysics

eHST 55

Suzaku Observation of the Ophiuchus Galaxy Cluster: One of the Hottest Cool Core Clusters

DOI: 10.1093/pasj/60.5.1133 Bibcode: 2008PASJ...60.1133F

Sarazin, Craig L.; Reiprich, Thomas H.; Hayashida, Kiyoshi +6 more

We present the analysis of a Suzaku observation of the Ophiuchus galaxy cluster. We confirmed that the cluster has a cool core. While the temperature of the intracluster medium (ICM) decreases toward the center, the metal abundance increases. Except for the core (r lesssim 50kpc), the cluster is hot (∼9-10keV) and is almost isothermal for r lesssi…

2008 • Publications of the Astronomical Society of Japan

Suzaku 55

Angular Diameters of the G Subdwarf µ Cassiopeiae A and the K Dwarfs σ Draconis and HR 511 from Interferometric Measurements with the CHARA Array

DOI: 10.1086/589554 Bibcode: 2008ApJ...683..424B

Gies, Douglas R.; Henry, Todd; Jao, Wei-Chun +13 more

Using the longest baselines of the CHARA Array, we have measured the angular diameter of the G5 V subdwarf µ Cas A, the first such determination for a halo population star. We compare this result to new diameters for the higher metallicity K0 V stars, σ Dra and HR 511, and find that the metal-poor star, µ Cas A, has an effective temper…

2008 • The Astrophysical Journal

eHST 55

Star formation histories of early-type galaxies at z = 1.2 in cluster and field environments

DOI: 10.1051/0004-6361:200809531 Bibcode: 2008A&A...488..853G

Demarco, R.; Rosati, P.; Nonino, M. +3 more

We derive the star formation histories of early-type galaxies at z≃1.2 in both low and high density environments. To this purpose, we compare the co-added spectroscopic and 8-9 band photometric data of 43 mass selected early-type galaxies in the massive cluster RDCS J1252.9-2927 and the GOODS/CDF-S field with a large grid of composite stellar popu…

2008 • Astronomy and Astrophysics

eHST 55

Sequestration of Ethane in the Cryovolcanic Subsurface of Titan

DOI: 10.1086/587141 Bibcode: 2008ApJ...677L..67M

Mousis, Olivier; Schmitt, Bernard

Saturn's largest satellite, Titan, has a thick atmosphere dominated by nitrogen and methane. The dense orange-brown smog hiding the satellite's surface is produced by photochemical reactions of methane, nitrogen, and their dissociation products with solar ultraviolet, which lead primarily to the formation of ethane and heavier hydrocarbons. In the…

2008 • The Astrophysical Journal

Huygens 55

Auroral current systems in Saturn's magnetosphere: comparison of theoretical models with Cassini and HST observations

DOI: 10.5194/angeo-26-2613-2008 Bibcode: 2008AnGeo..26.2613C

Coates, A. J.; Dougherty, M. K.; Nichols, J. D. +7 more

The first simultaneous observations of fields and plasmas in Saturn's high-latitude magnetosphere and UV images of the conjugate auroral oval were obtained by the Cassini spacecraft and the Hubble Space Telescope (HST) in January 2007. These data have shown that the southern auroral oval near noon maps to the dayside cusp boundary between open and…

2008 • Annales Geophysicae

Cassini eHST 54

Interferometric Detections of GOODS 850-5 at 1 mm and 1.4 GHz

DOI: 10.1086/528794 Bibcode: 2008ApJ...673L.127D

Morrison, G.; Walter, F.; Dannerbauer, H.

We have obtained a position (at subarcsecond accuracy) of the submillimeter bright source GOODS 850-5 (also known as GN 10) in the GOODS-North field using the IRAM Plateau de Bure interferometer at 1.25 mm wavelengths (MM J123633+6214.1; flux density: S_{1.25 mm} = 5.0 +/- 1.0 mJy). This source has no optical counterpart in deep ACS imagin…

2008 • The Astrophysical Journal

eHST 54

Spatially resolved dusty torus toward the red supergiant WOH G64 in the Large Magellanic Cloud

DOI: 10.1051/0004-6361:200809469 Bibcode: 2008A&A...484..371O

Weigelt, G.; Hofmann, K. -H.; Driebe, T. +2 more

Aims: We present N-band spectro-interferometric observations of the red supergiant WOH G64 in the Large Magellanic Cloud (LMC) using MIDI at the Very Large Telescope Interferometer (VLTI). While the very high luminosity (∼ 5 × 10⁵ L_⊙) previously estimated for WOH G64 suggests that it is a very massive star …

2008 • Astronomy and Astrophysics

ISO 54

The kinematic footprints of five stellar streams in Andromeda's halo

DOI: 10.1111/j.1365-2966.2008.13703.x Bibcode: 2008MNRAS.390.1437C

Tanvir, N.; Rich, R. M.; Koch, A. +12 more

We present a spectroscopic analysis of five stellar streams (`A', `B', `Cr', `Cp' and `D') as well as the extended star cluster, EC4, which lies within Stream`C', all discovered in the halo of M31 from our Canada-France-Hawaii Telescope/MegaCam survey. These spectroscopic results were initially serendipitous, making use of our existing observation…

2008 • Monthly Notices of the Royal Astronomical Society

eHST 54