This review summarizes our current understanding of the outer heliosphere and local interstellar medium (LISM) inferred from observations modeling interplanetary Lyman-$\alpha$ emission. The emission is produced by solar Lyman-alpha photons (121.567 nm) backscattered H atoms inflowing to LISM. Studies radiation determined parameters hydrogen within a few astronomical units Sun. appeared be dece...

GHRS-EchA and G160M spectra of β-Pictoris have been obtained in the 1400-1600 Å range. A detailed analysis of the CO A-X (0-0, 1-0, 2-0) bands and of the CI λ1561 Å multiplet is presented. A column density of the order of 2 1015 cm−2 is found for both species. For CO, the rotational temperature is found close to 20 K and the turbulent Doppler width is b=0.8 km.s−1. Including the 13CO lines in t...

We present here new GHRS observations of Lyα absorption lines associated with groups or clusters toward the QSOs 1545+2101 and 0850+4400. In the first case we have identified at least eight distinct Lyα absorption features, with a mean redshift of < z >= 0.2648 ± 0.0002 and a velocity dispersion of 163 ± 57 km s −1. We have also identified a group or cluster of galaxies in the vicinity of this ...

V471 Tauri, an eclipsing system consisting of a hot DA white dwarf (WD) and a dK2 companion in a 12.5-hour orbit, is the prototype of the pre-cataclysmic binaries. The late-type component is magnetically active, due to its being constrained to rotate synchronously with the short orbital period. During a program of ultraviolet spectroscopy of V471 Tau, carried out with the Goddard High Resolutio...

Here we present a new synoptic analysis of 5 HSTGHRS interplanetary H-Lyα spectra obtained at different lines of sight from different positions of the earth in its orbit. The spectral analysis aimed at the derivation of actual interstellar gas parameters is carried out on the basis of a newly developed Lyα radiation transport code taking into account the effects of angle-dependent partial frequ...

Growth hormone receptor (GHR) cDNA and gene of the Japanese flounder (Paralicthys olivaceus) were cloned and their molecular structures were characterized. The 641 amino acid sequence predicted from the cDNA sequence showed more than 75% overall sequence similarity with GHRs of other teleosts such as turbot and goldfish, and contained common structural features of vertebrate GHRs. The extracell...

Observations of resolved HeII Lyman alpha absorption in spectra of two QSO’s suggest that the epoch of helium ionization occurred at z ≈ 3. Proximity zones in the spectra of the quasars (z = 3.18, 3.285) at 304 Å resemble Stromgren spheres, suggesting that the intergalactic medium is only singly ionized in helium. We present models of the proximity effect which include the full physics of the i...

We have examined the physical conditions in intrinsic UV-absorbing gas in the Seyfert galaxy NGC 4151, using echelle spectra obtained with the Space Telescope Imaging Spectrograph (STIS) on the Hubble Space Telescope (HST) on 1999 July 19. We confirm the presence of the kinematic components detected in earlier Goddard High Resolution Spectrograph (GHRS) observations, all of which appear to be o...

We have analyzed GHRS data of eight CTTS and one WTTS. The GHRS data consists of spectral ranges 40 Å wide centered on 1345, 1400, 1497, 1550, and 1900 Å. These UV spectra show strong Si IV, and C IV emission, and large quantities of sharp (∼ 40 km s) H2 lines. All the H2 lines belong to the Lyman band and all the observed lines are single peaked and optically thin. The averages of all the H2 l...

Our analysis of high-resolution Goddard High-Resolution Spectrograph (GHRS) spectra of late-type stars shows that the Si IV and C IV lines formed near 105 K can be decomposed into the sum of two Gaussians, a broad component and a narrow component. We Ðnd that the Ñux contribution of the broad components is correlated with both the C IV and X-ray surface Ñuxes. For main-sequence stars, the width...