# The Binarity of η Carinae Revealed from Photoionization Modeling of the Spectral Variability of the Weigelt Blobs B and D

@article{Verner2005TheBO,
title={The Binarity of $\eta$ Carinae Revealed from Photoionization Modeling of the Spectral Variability of the Weigelt Blobs B and D},
author={Ekaterina M. Verner and Frederick C. Bruhweiler and T R Gull},
journal={The Astrophysical Journal},
year={2005},
volume={624},
pages={973-982}
}
• Published 2005
• Physics
• The Astrophysical Journal
We focus on two Hubble Space Telescope Space Telescope Imaging Spectrograph (HST STIS) spectra of the Weigelt blobs B and D, extending from 1640 to 10400 A, one recorded during the 1998 minimum (1998 March) and the other recorded in 1999 February, early in the following broad maximum. The spatially resolved spectra suggest two distinct ionization regions. One structure is the permanently low-ionization cores of the Weigelt blobs B and D, located several hundred AU from the ionizing source… Expand

#### Tables from this paper

η Carinae across the 2003.5 Minimum: Spectroscopic Evidence for Massive Binary Interactions
We have analyzed high spatial, moderate spectral resolution observations of η Carinae (η Car) obtained with the STIS from 1998.0 to 2004.3. The data were obtained at discrete times covering an entireExpand
High-Excitation Emission Lines Near Eta Carinae, and Its Likely Companion Star
• Physics
• 2009
In order to study the distribution of gas and ionizing radiation around η Car and their implications for its likely companion star, we have examined high-excitation emission lines of [Ne III], [FeExpand
Eta Carinae across the 2003.5 Minimum: Deciphering the Spectrum toward Weigelt D
• Physics
• 2007
Hubble Space Telescope Space Telescope Imaging Spectrograph (HST STIS) near-ultraviolet (NUV) echelle spectra reveal complex structure in the sight line toward the Weigelt D condensation locatedExpand
The extended interacting wind structure of Eta Carinae
The highly eccentric binary system, η Car, provides clues to the transition of massive stars from hydrogen-burning via the CNO cycle to a helium-burning evolutionary state. The fastmoving wind of ηExpand
η Carinae: linelist for the emission spectrum of the Weigelt blobs in the 1700 to 10 400 Å wavelength region
• Physics
• 2012
Aims. We present line identifications in the 1700 to 10 400 angstrom region for the Weigelt blobs B and D, located 0.'' 1 to 0 ''.3 NNW of Eta Carinae. The aim of this work is to characterize theExpand
On the influence of the companion star in Eta Carinae: 2D radiative transfer modeling of the ultraviolet and optical spectra
We present 2D radiative transfer modeling of the Eta Carinae binary system accounting for the presence of a wind-wind collision (WWC) cavity carved in the optically-thick wind of the primary star. ByExpand
ETA CARINAE ACROSS THE 2003.5 MINIMUM: ANALYSIS IN THE VISIBLE AND NEAR INFRARED SPECTRAL REGION
• Physics
• 2009
We present an analysis of the visible through near infrared spectrum ofCar and its ejecta obtained during the "� Car Campaign with the Ultraviolet and Visual Echelle Spectrograph (UVES) at the ESOExpand
HIGH-DENSITY CIRCUMSTELLAR INTERACTION IN THE LUMINOUS TYPE IIn SN 2010jl : THE FIRST 1100 DAYS
Hubble Space Telescope and ground-based observations of the Type IIn supernova (SN) 2010jl are analyzed, including photometry and spectroscopy in the ultraviolet, optical, and near-IR bands, 26-1128Expand
Detection of a hot binary companion of η carinae
• Physics
• 2005
We report the detection of a hot companion of η Carinae using high-resolution spectra (905-1180 A) obtained with the Far Ultraviolet Spectroscopic Explorer (FUSE) satellite. Observations wereExpand
The Time Evolution of Eta Carinae's Colliding Winds
• Physics
• 2011
We report new HST/STIS observations that map the high-ionization forbidden line emission in the inner arc second of Eta Car, the first that fully image the extended wind-wind interaction region ofExpand

#### References

SHOWING 1-10 OF 42 REFERENCES
On the Nature of the Central Source in η Carinae
• Physics
• 2001
Long-slit spectroscopic observations of η Carinae and its Homunculus have recently been obtained using STIS on the Hubble Space Telescope (HST). We have extracted the spectrum of the central sourceExpand
The Origin of Fe II and [Fe II] Emission Lines in the 4000-10000 Å Range in the BD Weigelt Blobs of η Carinae*
• Physics
• 2002
We present numerical simulations that reproduce the salient features of the amazingly strong (Fe ii) and Fe ii emission spectra in the B and D Weigelt blobs ofCarinae. For our studies we have usedExpand
On the Multiplicity of η Carinae
• Physics
• 1998
The nebula around the luminous blue variable (LBV) η Car is extremely N rich and C and O poor, which is indicative of CNO-cycle products. On the other hand, the recent Hubble Space Telescope-GoddardExpand
Latitude-dependent Effects in the Stellar Wind of η Carinae
• Physics
• 2003
The Homunculus reflection nebula around η Carinae provides a rare opportunity to observe the spectrum of a star from more than one direction. In the case of η Car, the nebula's geometry is known wellExpand
The 5.52 Year Cycle of Eta Carinae: BeppoSAX Detection of Variable Hard (> 10 keV) X-Ray Emission
I have discovered spectroscopic variations correlated with the photometric near-infrared (NIR) light curve in η Carinae. The fading of the high-excitation lines is coincident with the peaks in theExpand
Long-term spectroscopy of η Carinae - I. The high and low excitation phases
• Physics
• 1998
Quantitative measurements of line parameters in the spectrum of η Carinae are presented for both the broad and narrow line components. A total of 655 spectral features were measured in the spectralExpand
The X-Ray Light Curve of η Carinae: Refinement of the Orbit and Evidence for Phase-dependent Mass Loss
• Physics
• 2001
We solve the Rossi X-Ray Timing Explorer X-ray light curve of the extremely luminous and massive star η Carinae with a colliding-wind emission model to refine the ground-based orbital elements. TheExpand
The X-ray light curve of Eta Carinae
• Physics
• 1998
ABSTRA C T Following the proposal by Damineli that the central object of Eta Carinae may be an early-type binary, we perform numerical simulations of the X-ray emission from colliding stellar winds.Expand
Anomalously bright UV lines of Fe II as a probe of gas condensations in the vicinity of hot stars
• Physics
• 2003
Two UV lines of Fe II at 2507/2509 A are extremely bright in spatially resolved HST/STIS spectra of dense gas condensations (the so called Weigelt blobs) close to the central star of η Carinae. TheExpand
In hot pursuit of the hidden companion of Carinae: An X-ray determination of the wind parameters
• Physics
• 2002
We present X-ray spectral ts to a recently obtained Chandra grating spectrum of Carinae, one of the most massive and powerful stars in the Galaxy and which is strongly suspected to be a collidingExpand