Science Archives Publication System

The Evolution of Rest-Frame K-Band Properties of Early-Type Galaxies from z = 1 to the Present1,

DOI: 10.1086/499919 Bibcode: 2006ApJ...636L..21V

Rix, H. -W.; van der Wel, A.; Illingworth, G. D. +3 more

We measure the evolution of the rest-frame K-band fundamental plane from z=1 to the present by using IRAC imaging of a sample of early-type galaxies in the Chandra Deep Field-South at z~1 with accurately measured dynamical masses. We find that M/L_K evolves as Δln(M/L_K)=(-1.18+/-0.10)z, which is slower than in the B band [Δln(…

2006 • The Astrophysical Journal

eHST 34

Hidden Trigger for the Giant Starburst Arc in M83?

DOI: 10.1086/507886 Bibcode: 2006ApJ...652.1122D

Mediavilla, Evencio; Díaz, Rubén J.; Dottori, Horacio +3 more

The huge star formation events that occur at some galactic centers do not provide enough clues as to their origin, since the morphological signatures of the triggering mechanism are smeared out in the timescale of a few orbital revolutions of the galaxy core. Our high spatial resolution three-dimensional near-infrared spectroscopy for the first ti…

2006 • The Astrophysical Journal

eHST 34

The H I Content of E+A Galaxies

DOI: 10.1086/505633 Bibcode: 2006ApJ...649..163B

Dejonghe, H.; Pisano, D. J.; Freeman, K. +3 more

We present deep single-dish H I observations of a sample of six nearby E+A galaxies (0.05<z<0.1). A nonnegligible fraction of a local sample of E+As are detected in H I. In four galaxies, we have detected up to a few times 10⁹ M_solar of neutral gas. These E+A galaxies are almost as gas-rich as spiral galaxies with compa…

2006 • The Astrophysical Journal

eHST 34

The Tully-Fisher relation of intermediate redshift field and cluster galaxies from Subaru spectroscopy

DOI: 10.1111/j.1365-2966.2005.09834.x Bibcode: 2006MNRAS.366..144N

Milvang-Jensen, B.; Aragón-Salamanca, A.; Bamford, S. P. +3 more

We have carried out spectroscopic observations in four cluster fields using Subaru's FOCAS multislit spectrograph and obtained spectra for 103 bright disc field and cluster galaxies at 0.06 <=z<= 1.20. 77 of these show emission lines, and 33 provide reasonably secure determinations of the galaxies' rotation velocity. The rotation velocities,…

2006 • Monthly Notices of the Royal Astronomical Society

eHST 34

Ion escape at Mars: Comparison of a 3-D hybrid simulation with Mars Express IMA/ASPERA-3 measurements

DOI: 10.1016/j.icarus.2005.09.018 Bibcode: 2006Icar..182..350K

Coates, A. J.; Kallio, E.; Fedorov, A. +44 more

We have analysed ion escape at Mars by comparing ASPERA-3/Mars Express ion measurements and a 3-D quasi-neutral hybrid model. As Mars Express does not have a magnetometer onboard, the analysed IMA data are from an orbit when the IMF clock angle was possible to determine from the magnetic field measurements of Mars Global Surveyor. We found that fa…

2006 • Icarus

MEx 34

Density Diagnostics of the Hot Plasma in AE Aquarii with XMM-Newton

DOI: 10.1086/499152 Bibcode: 2006ApJ...639..397I

Ishida, Manabu; Kunieda, Hideyo; Okada, Shunsaku +1 more

We report on XMM-Newton observations of the magnetic CV AE Aqr. High-resolution spectroscopy of the He-like triplet of N and O with the RGS has enabled us to measure the electron number density of the plasma as ~10¹¹ cm^-3. Incorporating this with the emission measure, we estimate the geometrical scale of the plasma emitting t…

2006 • The Astrophysical Journal

XMM-Newton 34

Subarcsecond-Resolution Radio Maps of Nearby Spiral Galaxies

DOI: 10.1086/508373 Bibcode: 2006AJ....132.2383T

Meier, David S.; Turner, Jean L.; Beck, Sara C. +3 more

We report subarcsecond-resolution Very Large Array imaging of four nearby spiral galaxies: IC 342, Maffei II, NGC 2903, and NGC 6946. In each galaxy, compact radio continuum sources are identified in the central ~15^''×15^'' region. These compact sources are responsible for 20%-30% of the total emission from the central kilopar…

2006 • The Astronomical Journal

eHST 34

Properties of dust in the high-latitude translucent cloud L1780. I. Spatially distinct dust populations and increased dust emissivity from ISO observations

DOI: 10.1051/0004-6361:20053467 Bibcode: 2006A&A...451..961R

Juvela, M.; Lemke, D.; Lehtinen, K. +2 more

We have analyzed the properties of dust in the high galactic latitude translucent cloud Lynds 1780 using ISOPHOT maps at 100 µm and 200 µm and raster scans at 60 µm, 80 µm, 100 µm, 120 µm, 150 µm and 200 µm. In far-infrared (FIR) emission, the cloud has a single core that coincides with the maxima of…

2006 • Astronomy and Astrophysics

ISO 34

X-ray continuum properties of GRB afterglows observed by XMM-Newton and Chandra

DOI: 10.1051/0004-6361:20053903 Bibcode: 2006A&A...455..803G

Piro, L.; Corsi, A.; Gendre, B.

We present a catalog of XMM-Newton and Chandra observations of gamma-ray burst (GRB) afterglows, reduced in a common way using the most up-to-date calibration files and software. We focus on the continuum properties of the afterglows. We derive the spectral and temporal decay indices for 16 bursts. We place constraints on the burst environment and…

2006 • Astronomy and Astrophysics

XMM-Newton 34

On the compact nature of the most luminous ULX in the Cartwheel ring

DOI: 10.1111/j.1365-2966.2006.11116.x Bibcode: 2006MNRAS.373.1627W

Trinchieri, Ginevra; Wolter, Anna; Colpi, Monica

We report the first detection of flux variability in the most luminous X-ray source in the southern ring of the Cartwheel galaxy. XMM-Newton data show that the luminosity has varied over a time-scale of 6 months from L_0.5-10keV ~ 1.3 × 10⁴¹ergs^-1, consistent with the previous Chandra observation, to L_0.5-10keV…

2006 • Monthly Notices of the Royal Astronomical Society

XMM-Newton 34