Science Archives Publication System

ASOCAM Observations of CYG X-3: Search for a Hot Stellar Wind

DOI: 10.1023/A:1001142514595 Bibcode: 1998Ap&SS.255..205O

Fender, R. P.; Ogley, R. N.; Burnell, S. J. Bell

Six CAM observations have been made in the 4 - 14 µm wavelength region to search for further evidence of emission from a hot stellar wind. Initial results suggest that the spectrum detected by Fender et al. using UKIRT extends into the wavelength region covered by ISOCAM. There is also evidence that the source is variable on timescales of ≈ 70 sec…

1998 • Astrophysics and Space Science

ISO 1

Sumer/soho

Bibcode: 1998BASI...26..267D

Dwivedi, B. N.

1998 • Bulletin of the Astronomical Society of India

SOHO 1

Calibration of the Debris Project ISOPHOT Data

DOI: 10.1023/A:1001179221922 Bibcode: 1998Ap&SS.255..119S

Silverstone, Murray; Becklin, E. E.; Spangler, Celeste

1998 • Astrophysics and Space Science

ISO 1

On the evolutionary status of lambda Bbootis stars using HIPPARCOS data

DOI: 10.48550/arXiv.astro-ph/9805247 Bibcode: 1998CoSka..27..479P

Paunzen, E.

Using the Hipparcos data, absolute magnitudes and thus the evolutionary status for the group of lambda Bootis stars were derived. The origin of this small group of non-magnetic, chemically peculiar stars, still remains a matter of debate. Using new evolutionary tracks, an age determination could be provided to distinguish between the two competing…

1998 • Contributions of the Astronomical Observatory Skalnate Pleso

Hipparcos 1

The JPL Extragalactic Radio Reference Frame: Astrometric Results of 1978-96 Deep Space Network VLBI

Bibcode: 1998TMOPR.133E...1J

Naudet, C. J.; Sovers, O. J.; Coker, R. F. +2 more

Celestial reference frames determined from measurements of extragalactic radio sources are used in interplanetary navigation, Earth orientation measurements, geodesy, and astrometry. The JPL 1997-3 celestial reference frame is derived from very long baseline interferometric (VLBI) measurements of 291 compact extragalactic radio sources. The observ…

1998 • Telecommunications and Mission Operations Progress Report

Hipparcos 1

Analysis of Infrared Spectra of Carbon Stars Observed by the ISO SWS

DOI: 10.1023/A:1001512513203 Bibcode: 1998Ap&SS.255..369O

Ohnaka, K.; Yamamura, I.; Tsuji, T. +1 more

1998 • Astrophysics and Space Science

ISO 1

Blue Compact Galaxies at Redshifts Z=0.2-1.3

DOI: 10.1023/A:1002169018546 Bibcode: 1998Ap&SS.263..127G

Guzmán, R.

We study the nature of faint blue compact galaxies (BCGs) at redshifts z ∼ 0.2 - 1.3 using Keck and HST. Despite being very luminous (L_B ∼ L^*), most distant BCGs have masses M ∼ 10¹⁰M_⊙, i.e., they are dwarf stellar systems. The majority of these galaxies have colors, sizes, surface brightnesses, luminosi…

1998 • Astrophysics and Space Science

eHST 1

Galactic Evolution of the Light Elements: A New Set of B Observations

Bibcode: 1998SSRv...84..161P

Primas, F.

The boron 2500 Angstroms spectral region has been observed with the Goddard High Resolution Spectrograph (GHRS) of the Hubble Space Telescope (HST) in a new set of metal-poor stars and analyzed by spectrum synthesis technique, adopting the most recent model atmospheres. By taking into account the Li and Be abundances available from the literature …

1998 • Space Science Reviews

eHST 1

HST observations of GRO J1655/-40 in outburst

DOI: 10.1016/S1387-6473(98)00081-5 Bibcode: 1998NewAR..42..605H

Hynes, Robert I.

We examine the results of a coordinated HST-RXTE-CGRO campaign to study the microquasar GRO J1655-40 during its 1996-7 outburst, focusing on interpretation of the overall anti-correlation seen between optical and X-ray fluxes during the early months of the outburst. Our tools include echo-mapping, optical/UV continuum spectral modelling and analys…

1998 • New Astronomy Reviews

eHST 1

Kinematic Substructure of Halo Stars from HIPPARCOS Observations

DOI: 10.1086/311641 Bibcode: 1998ApJ...506L..79C

Chen, B.

In the Letter ``Kinematic Substructure of Halo Stars from Hipparcos Observations'' by B. Chen (ApJ, 495, L1 [1998]), the color-magnitude diagram in Figure 6 is plotted upside down. Thus, most stars in the sample are halo main-sequence stars. Other results and the conclusion of the Letter are not affected.

1998 • The Astrophysical Journal

Hipparcos 1