Hubble Space Telescope Spectroscopy of Eta Carinae and Chi Lupi

Torgil Zethson

Hubble Space Telescope Spectroscopy of Eta Carinae and Chi Lupi

Torgil Zethson

Particle and nuclear physics

Research output: Thesis › Doctoral Thesis (compilation)

Abstract

Eta Carinae is a super-massive, super-luminous star. It is surrounded by a bipolar nebula, the "Homunculus", and several blobs of ejected gas which are the source of a complex emission-line spectrum. This thesis presents results from spectroscopic investigations of the star and its surroundings, performed with the Space Telescope Imaging Spectrograph (STIS) and the Goddard High Resolution Spectrograph (GHRS) onboard the Hubble Space Telescope (HST). The age of the equatorial disk in the Homunculus has been studied by measurements of radial velocities of emission lines. Fluorescence processes in Fe II, Fe III, and Cr II are discussed, and the discovery of an ejected filament producing Sr II and [Sr II] emission is reported. Also, a list of 2000 emission line identifications is presented and discussed.

The chemically peculiar star Chi Lupi was the target of the "Pathfinder Project", a mapping of the UV spectrum of the star using the GHRS. An investigation of the abundance and isotopic composition of boron in Chi Lupi is presented.

The launch of space telescopes has put greater demands on the quality of atomic data needed for the analyses of the observed spectra. This thesis presents laboratory measurements of wavelengths and transitions isotope shifts in the B~II spectrum.

Original language	English
Qualification	Doctor
Awarding Institution	Particle and nuclear physics
Supervisors/Advisors	[unknown], [unknown], Supervisor, External person
Award date	2001 Mar 9
Publisher	Atomic Spectroscopy, Department of Physics, Box 118, 221 00 Lund, Sweden
ISBN (Print)	91-7874-112-2
Publication status	Published - 2001

Bibliographical note

Defence details

Date: 2001-03-09
Time: 10:15
Place: Lecture Hall B at the Department of Physics

External reviewer(s)

Name: Pagel, Bernard
Title: Professor
Affiliation: [unknown]

---

Article: T. Zethson, S. Johansson, K. Davidson, R.M. Humphreys, K. Ishibashi, and D. Ebbets, "Strange velocities in the equatorial ejecta of Eta Carinae", Astronomy & Astrophysics, Vol. 344, p.211, 1998
 
Article: S. Johansson, T. Zethson, H. Hartman, J.O. Ekberg, K. Ishibashi, K. Davidson, and T.R. Gull, "New forbidden and fluorescent Fe III lines identified in HST spectra of Eta Carinae", Astronomy & Astrophysics, Vol. 361, p.977, 2000
 
Article: T. Zethson, T.R. Gull, H. Hartman, S. Johansson, K. Davidson, and K. Ishibashi, "Sr II and [Sr II] emission in the ejecta of Eta Carinae", submitted to The Astronomical Journal
 
Article: T. Zethson, H. Hartman, S. Johansson, T.R. Gull, K. Ishibashi, and K. Davidson, "Cr II fluorescence in Eta Carinae due to Hydrogen Lyman-alpha pumping", to appear in the proceedings (ASP Conf. Series) of the meeting: Eta Carinae and other mysterious stars -- the hidden opportunities of emission line spectroscopy, August 24-26, 2000, Hven, Sweden
 
Article: U. Litzen, T. Zethson, P. Jönsson, J. Kasten, R. Kling, and F. Launay, "Precision measurements and calculations in the B II spectrum: Wavelengths, isotope shifts, and oscillator strengths", Physical Review A, Vol. 57, p.2477, 1998
 
Article: T. Zethson, S. Johansson, G.M. Wahlgren, and D. Leckrone, "High-resolution observation of B II 1362 Å in Chi Lupi", The Scientific impact of the Goddard High Resolution Spectrograph, eds. J.C. Brandt, T.B. Ake, and C.C. Petersen, ASP Conf. Ser. Vol. 143, p.339, 1998

Subject classification (UKÄ)

Subatomic Physics

Free keywords

magnetic and optical properties
supraconductors
electrical
Rymdteknik
kosmisk kemi
Condensed matter:electronic structure
rymdvetenskap
Astronomi
cosmic chemistry
space research
Astronomy
boron
isotope shifts
Chi Lupi
fluorescence
element abundances
emission lines
GHRS
strontium
STIS
Eta Carinae
spectroscopy
Hubble Space Telescope
supraledare
magnetiska och optiska)
magnetisk resonans
Space technology
spektroskopi
relaxation
magnetic resonance
egenskaper (elektriska)
Kondenserade materiens egenskaper:elektronstruktur

Cite this

@phdthesis{2ea02f842a164a1fb764b6108c174c1e,

title = "Hubble Space Telescope Spectroscopy of Eta Carinae and Chi Lupi",

abstract = "Eta Carinae is a super-massive, super-luminous star. It is surrounded by a bipolar nebula, the {"}Homunculus{"}, and several blobs of ejected gas which are the source of a complex emission-line spectrum. This thesis presents results from spectroscopic investigations of the star and its surroundings, performed with the Space Telescope Imaging Spectrograph (STIS) and the Goddard High Resolution Spectrograph (GHRS) onboard the Hubble Space Telescope (HST). The age of the equatorial disk in the Homunculus has been studied by measurements of radial velocities of emission lines. Fluorescence processes in Fe II, Fe III, and Cr II are discussed, and the discovery of an ejected filament producing Sr II and [Sr II] emission is reported. Also, a list of 2000 emission line identifications is presented and discussed. The chemically peculiar star Chi Lupi was the target of the {"}Pathfinder Project{"}, a mapping of the UV spectrum of the star using the GHRS. An investigation of the abundance and isotopic composition of boron in Chi Lupi is presented. The launch of space telescopes has put greater demands on the quality of atomic data needed for the analyses of the observed spectra. This thesis presents laboratory measurements of wavelengths and transitions isotope shifts in the B~II spectrum.",

keywords = "magnetic and optical properties, supraconductors, electrical, Rymdteknik, kosmisk kemi, Condensed matter:electronic structure, rymdvetenskap, Astronomi, cosmic chemistry, space research, Astronomy, boron, isotope shifts, Chi Lupi, fluorescence, element abundances, emission lines, GHRS, strontium, STIS, Eta Carinae, spectroscopy, Hubble Space Telescope, supraledare, magnetiska och optiska), magnetisk resonans, Space technology, spektroskopi, relaxation, magnetic resonance, egenskaper (elektriska), Kondenserade materiens egenskaper:elektronstruktur",

author = "Torgil Zethson",

note = "Defence details Date: 2001-03-09 Time: 10:15 Place: Lecture Hall B at the Department of Physics External reviewer(s) Name: Pagel, Bernard Title: Professor Affiliation: [unknown] --- Article: T. Zethson, S. Johansson, K. Davidson, R.M. Humphreys, K. Ishibashi, and D. Ebbets, {"}Strange velocities in the equatorial ejecta of Eta Carinae{"}, Astronomy & Astrophysics, Vol. 344, p.211, 1998 Article: S. Johansson, T. Zethson, H. Hartman, J.O. Ekberg, K. Ishibashi, K. Davidson, and T.R. Gull, {"}New forbidden and fluorescent Fe III lines identified in HST spectra of Eta Carinae{"}, Astronomy & Astrophysics, Vol. 361, p.977, 2000 Article: T. Zethson, T.R. Gull, H. Hartman, S. Johansson, K. Davidson, and K. Ishibashi, {"}Sr II and [Sr II] emission in the ejecta of Eta Carinae{"}, submitted to The Astronomical Journal Article: T. Zethson, H. Hartman, S. Johansson, T.R. Gull, K. Ishibashi, and K. Davidson, {"}Cr II fluorescence in Eta Carinae due to Hydrogen Lyman-alpha pumping{"}, to appear in the proceedings (ASP Conf. Series) of the meeting: Eta Carinae and other mysterious stars -- the hidden opportunities of emission line spectroscopy, August 24-26, 2000, Hven, Sweden Article: U. Litzen, T. Zethson, P. J{\"o}nsson, J. Kasten, R. Kling, and F. Launay, {"}Precision measurements and calculations in the B II spectrum: Wavelengths, isotope shifts, and oscillator strengths{"}, Physical Review A, Vol. 57, p.2477, 1998 Article: T. Zethson, S. Johansson, G.M. Wahlgren, and D. Leckrone, {"}High-resolution observation of B II 1362 {\AA} in Chi Lupi{"}, The Scientific impact of the Goddard High Resolution Spectrograph, eds. J.C. Brandt, T.B. Ake, and C.C. Petersen, ASP Conf. Ser. Vol. 143, p.339, 1998",

year = "2001",

language = "English",

isbn = "91-7874-112-2",

publisher = "Atomic Spectroscopy, Department of Physics, Box 118, 221 00 Lund, Sweden",

type = "Doctoral Thesis (compilation)",

school = "Particle and nuclear physics",

}

TY - THES

T1 - Hubble Space Telescope Spectroscopy of Eta Carinae and Chi Lupi

AU - Zethson, Torgil

N1 - Defence details Date: 2001-03-09 Time: 10:15 Place: Lecture Hall B at the Department of Physics External reviewer(s) Name: Pagel, Bernard Title: Professor Affiliation: [unknown] --- Article: T. Zethson, S. Johansson, K. Davidson, R.M. Humphreys, K. Ishibashi, and D. Ebbets, "Strange velocities in the equatorial ejecta of Eta Carinae", Astronomy & Astrophysics, Vol. 344, p.211, 1998 Article: S. Johansson, T. Zethson, H. Hartman, J.O. Ekberg, K. Ishibashi, K. Davidson, and T.R. Gull, "New forbidden and fluorescent Fe III lines identified in HST spectra of Eta Carinae", Astronomy & Astrophysics, Vol. 361, p.977, 2000 Article: T. Zethson, T.R. Gull, H. Hartman, S. Johansson, K. Davidson, and K. Ishibashi, "Sr II and [Sr II] emission in the ejecta of Eta Carinae", submitted to The Astronomical Journal Article: T. Zethson, H. Hartman, S. Johansson, T.R. Gull, K. Ishibashi, and K. Davidson, "Cr II fluorescence in Eta Carinae due to Hydrogen Lyman-alpha pumping", to appear in the proceedings (ASP Conf. Series) of the meeting: Eta Carinae and other mysterious stars -- the hidden opportunities of emission line spectroscopy, August 24-26, 2000, Hven, Sweden Article: U. Litzen, T. Zethson, P. Jönsson, J. Kasten, R. Kling, and F. Launay, "Precision measurements and calculations in the B II spectrum: Wavelengths, isotope shifts, and oscillator strengths", Physical Review A, Vol. 57, p.2477, 1998 Article: T. Zethson, S. Johansson, G.M. Wahlgren, and D. Leckrone, "High-resolution observation of B II 1362 Å in Chi Lupi", The Scientific impact of the Goddard High Resolution Spectrograph, eds. J.C. Brandt, T.B. Ake, and C.C. Petersen, ASP Conf. Ser. Vol. 143, p.339, 1998

PY - 2001

Y1 - 2001

N2 - Eta Carinae is a super-massive, super-luminous star. It is surrounded by a bipolar nebula, the "Homunculus", and several blobs of ejected gas which are the source of a complex emission-line spectrum. This thesis presents results from spectroscopic investigations of the star and its surroundings, performed with the Space Telescope Imaging Spectrograph (STIS) and the Goddard High Resolution Spectrograph (GHRS) onboard the Hubble Space Telescope (HST). The age of the equatorial disk in the Homunculus has been studied by measurements of radial velocities of emission lines. Fluorescence processes in Fe II, Fe III, and Cr II are discussed, and the discovery of an ejected filament producing Sr II and [Sr II] emission is reported. Also, a list of 2000 emission line identifications is presented and discussed. The chemically peculiar star Chi Lupi was the target of the "Pathfinder Project", a mapping of the UV spectrum of the star using the GHRS. An investigation of the abundance and isotopic composition of boron in Chi Lupi is presented. The launch of space telescopes has put greater demands on the quality of atomic data needed for the analyses of the observed spectra. This thesis presents laboratory measurements of wavelengths and transitions isotope shifts in the B~II spectrum.

AB - Eta Carinae is a super-massive, super-luminous star. It is surrounded by a bipolar nebula, the "Homunculus", and several blobs of ejected gas which are the source of a complex emission-line spectrum. This thesis presents results from spectroscopic investigations of the star and its surroundings, performed with the Space Telescope Imaging Spectrograph (STIS) and the Goddard High Resolution Spectrograph (GHRS) onboard the Hubble Space Telescope (HST). The age of the equatorial disk in the Homunculus has been studied by measurements of radial velocities of emission lines. Fluorescence processes in Fe II, Fe III, and Cr II are discussed, and the discovery of an ejected filament producing Sr II and [Sr II] emission is reported. Also, a list of 2000 emission line identifications is presented and discussed. The chemically peculiar star Chi Lupi was the target of the "Pathfinder Project", a mapping of the UV spectrum of the star using the GHRS. An investigation of the abundance and isotopic composition of boron in Chi Lupi is presented. The launch of space telescopes has put greater demands on the quality of atomic data needed for the analyses of the observed spectra. This thesis presents laboratory measurements of wavelengths and transitions isotope shifts in the B~II spectrum.

KW - magnetic and optical properties

KW - supraconductors

KW - electrical

KW - Rymdteknik

KW - kosmisk kemi

KW - Condensed matter:electronic structure

KW - rymdvetenskap

KW - Astronomi

KW - cosmic chemistry

KW - space research

KW - Astronomy

KW - boron

KW - isotope shifts

KW - Chi Lupi

KW - fluorescence

KW - element abundances

KW - emission lines

KW - GHRS

KW - strontium

KW - STIS

KW - Eta Carinae

KW - spectroscopy

KW - Hubble Space Telescope

KW - supraledare

KW - magnetiska och optiska)

KW - magnetisk resonans

KW - Space technology

KW - spektroskopi

KW - relaxation

KW - magnetic resonance

KW - egenskaper (elektriska)

KW - Kondenserade materiens egenskaper:elektronstruktur

M3 - Doctoral Thesis (compilation)

SN - 91-7874-112-2

PB - Atomic Spectroscopy, Department of Physics, Box 118, 221 00 Lund, Sweden

ER -

Hubble Space Telescope Spectroscopy of Eta Carinae and Chi Lupi

Abstract

Bibliographical note

Subject classification (UKÄ)

Free keywords

Fingerprint

Cite this