Science Archives Publication System

The Morphological Decomposition of Abell 868

DOI: 10.1086/379560 Bibcode: 2003AJ....126.2662D

Phillipps, S.; Driver, S. P.; Odewahn, S. C. +4 more

We report on the morphological luminosity functions (LFs) and radial profiles derived for the galaxy population within the rich cluster Abell 868 (z=0.153) based purely on Hubble Space Telescope imaging in F606W. We recover Schechter functions (-24.0<M_F606W-5logh_0.65<-16.0) within a 0.65h_0.65 Mpc radius for e…

2003 • The Astronomical Journal

eHST 19

An XMM-Newton observation of the very young open cluster NGC 6383

DOI: 10.1051/0004-6361:20030910 Bibcode: 2003A&A...407..925R

Gosset, E.; Rauw, G.; De Becker, M. +2 more

We report the detection of a number of X-ray sources associated with the very young open cluster NGC 6383. About two thirds of these objects are correlated with a rather faint optical source and all but one have at least one infrared counterpart within a correlation radius of 8 arcsec. Although NGC 6383 is not associated with a prominent star form…

2003 • Astronomy and Astrophysics

XMM-Newton 19

Calcium Abundance in the Solar Wind

DOI: 10.1086/344834 Bibcode: 2003ApJ...583..489W

Wurz, P.; Bochsler, P.; Ipavich, F. M. +1 more

We report on the calcium abundance in the solar wind for an extended time period around the 1996 solar minimum. Data were recorded with the Mass Time-of-Flight (MTOF) sensor of the Charge, Element, and Isotope Analysis System (CELIAS) instrument on the SOHO spacecraft. The Ca/O abundance is 0.017+/-0.003 for slow solar wind (V_SW<400 …

2003 • The Astrophysical Journal

SOHO 19

Redshifts in the Hubble Deep Field South

DOI: 10.1086/377317 Bibcode: 2003AJ....126.1208S

Sawicki, Marcin; Mallén-Ornelas, Gabriela

We present a catalog of 97 spectroscopic redshifts of z<1 galaxies in the Hubble Deep Field South (HDF-S) and its flanking fields (FFs). In the HDF-S proper we observed approximately half the galaxies brighter than I₈₁₄(AB)=24 and obtained redshifts for 76% of them. Targets in our HDF-S sample were preselected to be at z<1 based o…

2003 • The Astronomical Journal

eHST 19

An intense and broad Fe K_alpha line observed in the X-ray luminous quasar Q 0056-363 with XMM-Newton

DOI: 10.1051/0004-6361:20030950 Bibcode: 2003A&A...408..119P

Porquet, D.; Reeves, J. N.

We present an XMM-Newton observation of the radio-quiet quasar Q0056-363 (z=0.162). This is the first time that this quasar is observed in the hard X-ray range (above 2 keV). We find that Q0056-363 is a powerful X-ray quasar, with a 0.3-12 keV unabsorbed luminosity of about 1.2 x 10⁴⁵ erg s^-1 with the large…

2003 • Astronomy and Astrophysics

IUE XMM-Newton 19

High-Resolution Continuum Imaging at 1.3 and 0.7 Centimeters of the W3 IRS 5 Region

DOI: 10.1086/378233 Bibcode: 2003ApJ...597..434W

Megeath, S. T.; Wilson, T. L.; Boboltz, D. A. +1 more

High-resolution images of the hypercompact H II (HC H II) regions in W3 IRS 5 taken with the Very Large Array (VLA) at 1.3 and 0.7 cm are presented. Four HC H II regions were detected with sufficient signal-to-noise ratios to allow the determination of relevant parameters, such as source position, size, and flux density. The sources are slightly e…

2003 • The Astrophysical Journal

eHST 19

Imaging and Spectroscopy of Galaxies Associated with Two z~0.7 Damped Lyα Absorption Systems

DOI: 10.1086/378957 Bibcode: 2003AJ....126.2230L

White, Richard L.; Gregg, Michael D.; Lacy, Mark +3 more

We have identified galaxies near two quasars that are at the redshift of damped Lyα (DLA) systems in the UV spectra of the quasars. Both galaxies are actively forming stars. One galaxy has a luminosity close to the break in the local galaxy luminosity function, L*; the other is significantly fainter than L* and appears to be interacting with a nea…

2003 • The Astronomical Journal

eHST 19

XMM-Newton observation of PG 0844+349

DOI: 10.1051/0004-6361:20021608 Bibcode: 2003A&A...398...81B

Branduardi-Raymont, G.; Brinkmann, W.; Grupe, D. +1 more

In a ~ 20 ksec XMM-Newton observation the X-ray transient radio-quiet quasar PG 0844+349 was found in a historically high state compared to previous X-ray observations. The quasar showed a featureless spectrum with a strong soft excess over the extrapolation of a hard power law. Comptonization models or a broken power law with Gamma_soft…

2003 • Astronomy and Astrophysics

XMM-Newton 19

On the nature of Collinder 121: insights from the low-mass pre-main sequence

DOI: 10.1111/j.1365-2966.2003.07160.x Bibcode: 2003MNRAS.346.1143B

Naylor, Tim; Jeffries, R. D.; Burningham, Ben +1 more

We present a VI photometric catalogue towards the open cluster Cr 121. XMM-Newton and ROSAT data are used to discover a low-mass pre-main sequence (PMS) along this sightline. de Zeeuw et al. have identified Cr 121 as a moving group, using Hipparcos data, at a distance of 592 pc; we reject the scenario that these low-mass PMS stars are associated w…

2003 • Monthly Notices of the Royal Astronomical Society

Hipparcos XMM-Newton 19

Search for the Optical Counterpart of the Vela Pulsar X-Ray Nebula

DOI: 10.1086/376829 Bibcode: 2003ApJ...594..419M

Caraveo, P. A.; De Luca, A.; Zaggia, S. +4 more

Observations of the Vela pulsar region with the Chandra X-Ray Observatory have revealed the fine structure of its synchrotron pulsar-wind nebula (PWN), which showed an overall similarity with the Crab PWN. However, contrary to the Crab, no firm detection of the Vela PWN in optical has been reported yet. To search for the optical counterpart of the…

2003 • The Astrophysical Journal

eHST 19