FUSE, STIS and Keck spectroscopic analysis of the UV-bright star vZ 1128 in M3 (NGC 5272)

@article{Chayer2015FUSESA,
  title={FUSE, STIS and Keck spectroscopic analysis of the UV-bright star vZ 1128 in M3 (NGC 5272)},
  author={Pierre Chayer and William V. Dixon and Alex W. Fullerton and Benjamin Ooghe-Tabanou and I. Neill Reid},
  journal={Monthly Notices of the Royal Astronomical Society},
  year={2015},
  volume={452},
  pages={2292-2305}
}
We present a spectral analysis of the UV-bright star vZ 1128 in M3 based on observations with the Far Ultraviolet Spectroscopic Explorer (FUSE), the Space Telescope Imaging Spectrograph (STIS), and the Keck HIRES echelle spectrograph. By fitting the H I, He I, and He II lines in the Keck spectrum with non-LTE H-He models, we obtain Teff = 36,600 K, log g = 3.95, and log N(He)/N(H) = -0.84. The star's FUSE and STIS spectra show photospheric absorption from C, N, O, Al, Si, P, S, Fe, and Ni. No… 

Observations of the Ultraviolet-bright Star Y453 in the Globular Cluster M4 (NGC 6121)

We present a spectral analysis of the UV-bright star Y453 in M4. Model fits to the star’s optical spectrum yield ∼ 56,000 K. Fits to the star’s FUV spectrum, obtained with the Cosmic Origins

Hot UV-bright stars of galactic globular clusters

Context. We have performed a census of the UV-bright population in 78 globular clusters using wide-field UV telescopes. This population includes a variety of phases of post-horizontal branch (HB)

Radial velocity variable, hot post-AGB stars from the MUCHFUSS project. Classification, atmospheric parameters, formation scenarios

In the course of the MUCHFUSS project we recently discovered four radial velocity (RV) variable, hot (T_(eff)≈ 80 000−110 000 K) post-asymptotic giant branch (AGB) stars. Among them, we found the

Probing the Gravitational Dependence of the Fine-Structure Constant from Observations of White Dwarf Stars

Hot white dwarf stars are the ideal probe for a relationship between the fine-structure constant and strong gravitational fields, providing us with an opportunity for a direct observational test. We

On the Same Wavelength as the Space Telescope Imaging Spectrograph

  • T. Ayres
  • Physics
    The Astronomical Journal
  • 2022
The Hubble Space Telescope Imaging Spectrograph (STIS) is a powerful tool for high spectral resolution ultraviolet (UV; 1150–3200 Å) studies of bright cosmic sources. However, achieving the superb

EVR-CB-004: An Inflated Hot Subdwarf O Star + Unseen WD Companion in a Compact Binary Discovered with the Evryscope

We present the discovery of EVR-CB-004, a close binary with a remnant stellar core and an unseen white dwarf (WD) companion. The analysis in this work reveals that the primary is potentially an

Stellar wind models of subluminous hot stars

Context. Mass-loss rate is one of the most important stellar parameters. Mass loss via stellar winds may influence stellar evolution and modifies stellar spectrum. Stellar winds of subluminous hot

Breaking news from the HST: the central star of the Stingray Nebula is now returning towards the AGB

NR is supported by a Leverhulme Trust Research Project Grant. NR was and TR is supported by the German Aerospace Center (DLR, grant 50 OR 1507). M3B is partially supported by ANPCyT through grant

References

SHOWING 1-10 OF 41 REFERENCES

Observations of ultraviolet-bright stars in globular clusters with the Hopkins Ultraviolet Telescope

Two UV-bright stars in globular clusters, UV5 in NGC 1851 and vZ 1128 in M3, were observed with the Hopkins Ultraviolet Telescope (HUT) during the Astro-1 space shuttle mission in 1990 December. The

Constraints on the Ionization Balance of Hot-Star Winds from FUSE Observations of O Stars in the Large Magellanic Cloud

We present Far Ultraviolet Spectroscopic Explorer (FUSE) spectra for 25 O stars in the Large Magellanic Cloud. We analyze wind profiles for the resonance lines from C III, N III, S IV, P V, S VI, and

The VLT-FLAMES survey of massive stars: observations centered on the Magellanic Cloud clusters NGC 330, NGC 346, NGC 2004, and the N11 region

We present new observations of 470 stars using the Fibre Large Array Multi-Element Spectrograph (FLAMES) instrument in fields centered on the clusters NGC 330 and NGC 346 in the Small Magellanic

Ionized Gas in the First 10 Kiloparsecs of the Interstellar Galactic Halo

We present Far Ultraviolet Spectroscopic Explorer (FUSE) observations of the post-asymptotic giant branch star von Zeipel 1128 (l = 42.°5, b = +78.°7; d = 10.2 kpc; z = 10.0 kpc; vLSR = -140 ± 8 km

Analysis of Far-UV Data of Central Stars of Planetary Nebulae: Occurrence and Variability of Stellar Winds

The occurrence of stellar wind in the central star of a planetary nebula (CSPN) can be revealed by the presence of P Cygni profiles of high-excitation lines overimposed on its stellar continuum. We

Iron abundances of B-type post-asymptotic giant branch stars in globular clusters: Barnard 29 in M 13 and ROA 5701 in ω Cen*

High-resolution optical and ultraviolet (UV) spectra of two B-type post-asymptotic giant branch (post-AGB) stars in globular clusters, Barnard 29 in M 13 and ROA 5701 in ω Cen, have been analysed

The Chemical Composition Contrast between M3 and M13 Revisited: New Abundances for 28 Giant Stars in M3

We report new chemical abundances of 23 bright red giant members of the globular cluster M3, based on high-resolution (R ∼ 45,000) spectra obtained with the Keck I telescope. The observations, which

Spectral analysis of the sdO K 648 , the exciting star of the planetary nebula Ps 1 in the globular cluster M 15 ( NGC 7078 )

We present a spectral analysis of the sdO central star K 648 based on medium-resolution optical and high-resolution UV spectra. The photospheric parameters are determined by means of state-of-the-art

IONIZED GAS IN THE FIRST 10 kpc OF THE INTERSTELLAR GALACTIC HALO: METAL ION FRACTIONS

We present direct measures of the ionization fractions of several sulfur ions in the Galactic warm ionized medium (WIM). We obtained high-resolution ultraviolet absorption-line spectroscopy of

Chemical Abundances and Rotation Velocities of Blue Horizontal-Branch Stars in Six Globular Clusters

High-resolution spectroscopic measurements of blue horizontal-branch stars in six metal-poor globular clusters—M3, M13, M15, M68, M92, and NGC 288—reveal remarkable variations in photospheric