Science Archives Publication System

Fe II/Mg II Emission-Line Ratios of QSOs within 0 < z < 5.3

DOI: 10.1086/324540 Bibcode: 2002ApJ...565...63I

Doi, Mamoru; Yoshii, Yuzuru; Motohara, Kentaro +3 more

Near-infrared spectra of 13 QSOs located between 4.4<z<5.3 were obtained by the OH-airglow suppression spectrograph mounted on the Subaru telescope. The Fe II/Mg II emission-line ratios of the QSOs at various redshifts were examined by applying the same fitting algorithm to the present data together with published or archived spectra. We fou…

2002 • The Astrophysical Journal

IUE eHST 60

Carbon-rich giants in the HR diagram and their luminosity function

DOI: 10.1051/0004-6361:20020525 Bibcode: 2002A&A...390..967B

Bergeat, J.; Knapik, A.; Rutily, B.

The luminosity function (LF) of nearly 300 Galactic carbon giants is derived. Adding BaII giants and various related objects, about 370 objects are located in the RGB and AGB portions of the theoretical HR diagram. As intermediate steps, (1) bolometric corrections are calibrated against selected intrinsic color indices; (2) the diagram of photomet…

2002 • Astronomy and Astrophysics

Hipparcos 60

Is There a Metallicity-Luminosity Relationship in Active Galactic Nuclei? The Case of Narrow-Line Seyfert 1 Galaxies

DOI: 10.1086/339797 Bibcode: 2002ApJ...567L..19S

Netzer, Hagai; Shemmer, Ohad

The well-known relationship between metallicity and luminosity in active galactic nuclei (AGNs) is addressed by introducing new metallicity measurements (based on the method of Hamann & Ferland, hereafter HF) for a sample of narrow-line Seyfert 1 galaxies (NLS1s). Our new results, based on a sample of 162 AGNs, including nine NLS1s, indicate t…

2002 • The Astrophysical Journal

IUE 60

A Hubble Space Telescope Snapshot Survey of Nearby Supernovae

DOI: 10.1086/342493 Bibcode: 2002PASP..114..403L

Van Dyk, Schuyler D.; Filippenko, Alexei V.; Modjaz, Maryam +4 more

We present photometry of 13 recent supernovae (SNe) recovered in a Hubble Space Telescope Snapshot program and tie the measurements to earlier ground-based observations in order to study the late-time evolution of the SNe. Many of the ground-based measurements are previously unpublished and were made primarily with a robotic telescope, the Katzman…

2002 • Publications of the Astronomical Society of the Pacific

eHST 60

Evidence for Cluster Evolution from an Improved Measurement of the Velocity Dispersion and Morphological Fraction of Cluster 1324+3011 at z=0.76

DOI: 10.1086/342542 Bibcode: 2002AJ....124.1905L

Postman, Marc; Lubin, Lori M.; Oke, J. B.

We have carried out additional spectroscopic observations in the field of cluster Cl 1324+3011 at z=0.76. Combined with the spectroscopy recently presented by Postman, Lubin, & Oke, we now have spectroscopically confirmed 47 cluster members. With this significant number of redshifts, we measure accurately the cluster velocity dispersion to be …

2002 • The Astronomical Journal

eHST 59

Supernova 1998bw - the final phases

DOI: 10.1051/0004-6361:20020326 Bibcode: 2002A&A...386..944S

Panagia, N.; Sollerman, J.; Lundqvist, P. +10 more

The probable association with GRB 980425 immediately put SN 1998bw at the forefront of supernova research. Here, we present revised late-time BVRI light curves of the supernova, based on template images taken at the VLT. To follow the supernova to the very last observable phases we have used HST/STIS. Deep ima…

2002 • Astronomy and Astrophysics

eHST 59

86 GHz SiO maser survey of late-type stars in the Inner Galaxy. I. Observational data

DOI: 10.1051/0004-6361:20021017 Bibcode: 2002A&A...393..115M

Menten, K. M.; Omont, A.; Habing, H. J. +2 more

We present 86 GHz (v = 1, J = 2 -> 1) SiO maser line observations with the IRAM 30-m telescope of a sample of 441 late-type stars in the Inner Galaxy ( -4 degr < l < +30 degr ). These stars were selected on the basis of their infrared magnitudes and colours from the ISOGAL and MSX catalogues. SiO maser emission was detected in 271 sources…

2002 • Astronomy and Astrophysics

ISO 59

The Gravitational Lens-Galaxy Group Connection. I. Discovery of a Group Coincident with CLASS B0712+472

DOI: 10.1086/338648 Bibcode: 2002AJ....123..627F

Fassnacht, C. D.; Lubin, L. M.

Previous observations of the environments of the lensing galaxies in gravitational lens systems suggest that many of the lensing galaxies are associated with small groups of galaxies. As a result, we have begun a coordinated program to study the local environments of all known gravitational lens systems. In this paper, we present results on the gr…

2002 • The Astronomical Journal

eHST 59

Decay of sunspots

DOI: 10.1002/1521-3994(200208)323:3/4<342::AID-ASNA342>3.0.CO;2-5 Bibcode: 2002AN....323..342M

Martínez Pillet, V.

The photometric decay of sunspots is studied in some detail. Aspects related to leader vs. follower sunspot decay are presented and our current understanding of the physical mechanisms involved critically reviewed. The intrinsic instability of follower spots to form a stable sunspot cannot be understood in terms of the fluting stability as propose…

2002 • Astronomische Nachrichten

SOHO 59

Mass Loss and Jet Outflow in the Orion Nebula Proplyd LV 2

DOI: 10.1086/338055 Bibcode: 2002ApJ...566..315H

O'Dell, C. R.; Henney, W. J.; Meaburn, J. +2 more

We have obtained Hubble Space Telescope (HST) Space Telescope Imaging Spectrometer high-resolution spectra of the Orion proplyd LV 2 in the C III doublet at 1906.68 and 1908.73 Å. New images at the 6 cm wavelength with MERLIN complement earlier HST images at a similar spatial resolution. This object is one of the closest proplyds to θ¹ …

2002 • The Astrophysical Journal

eHST 59