The FERRUM project: Branching ratios and atomic transition probabilities of Fe II transitions from the 3d6(a 3F)4p subconfiguration in the visible to VUV spectral region

J. C. Pickering; Sveneric Johansson; P. L. Smith

doi:10.1051/0004-6361:20010943

The FERRUM project: Branching ratios and atomic transition probabilities of Fe II transitions from the 3d⁶(a ³F)4p subconfiguration in the visible to VUV spectral region

J. C. Pickering, Sveneric Johansson, P. L. Smith

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Abstract

We report measurements of the relative intensities of 81 emission linesof Fe II between 160 nm and 350 nm (62 168 cm<SUP>-1</SUP> to 28 564cm<SUP>-1</SUP>) from 4 levels by high resolution Fourier transformspectrometry, using a Penning discharge lamp as light source. Theserelative intensities have been used to determine the line branchingfractions, which have then been combined with accurate experimentalradiative lifetime measurements reported recently to give absolutetransition probabilities and oscillator strengths for 81 lines. Theaccuracy of these f-values is compared with other previous experimentalmeasurements, and with theoretical values. The new transitionprobabilities will allow accurate determinations of Fe II abundances ina wide variety of astrophysical objects. Tables 2 and 3 are onlyavailable in electronic form at the CDS via anonymous ftp tocdsarc.u-strasbg.fr (130.79.128.5) or viahttp://cdsweb.u-strasbg.fr/cgi-bin/qcat?J/A+A/377/361

Original language	English
Pages (from-to)	361-367
Journal	Astronomy & Astrophysics
Volume	377
DOIs	https://doi.org/10.1051/0004-6361:20010943
Publication status	Published - 2001

Subject classification (UKÄ)

Astronomy, Astrophysics and Cosmology

Free keywords

ATOMIC DATA
LINE: IDENTIFICATION
TECHNIQUES: SPECTROSCOPIC
STARS: ABUNDANCES

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10.1051/0004-6361:20010943

aa1411PickeringEDP2001

Cite this

@article{105161db6fc54b69bfa4239b456af050,

title = "The FERRUM project: Branching ratios and atomic transition probabilities of Fe II transitions from the 3d6(a 3F)4p subconfiguration in the visible to VUV spectral region",

abstract = "We report measurements of the relative intensities of 81 emission linesof Fe II between 160 nm and 350 nm (62 168 cm-1 to 28 564cm-1) from 4 levels by high resolution Fourier transformspectrometry, using a Penning discharge lamp as light source. Theserelative intensities have been used to determine the line branchingfractions, which have then been combined with accurate experimentalradiative lifetime measurements reported recently to give absolutetransition probabilities and oscillator strengths for 81 lines. Theaccuracy of these f-values is compared with other previous experimentalmeasurements, and with theoretical values. The new transitionprobabilities will allow accurate determinations of Fe II abundances ina wide variety of astrophysical objects. Tables 2 and 3 are onlyavailable in electronic form at the CDS via anonymous ftp tocdsarc.u-strasbg.fr (130.79.128.5) or viahttp://cdsweb.u-strasbg.fr/cgi-bin/qcat?J/A+A/377/361",

keywords = "ATOMIC DATA, LINE: IDENTIFICATION, TECHNIQUES: SPECTROSCOPIC, STARS: ABUNDANCES",

author = "Pickering, {J. C.} and Sveneric Johansson and Smith, {P. L.}",

year = "2001",

doi = "10.1051/0004-6361:20010943",

language = "English",

volume = "377",

pages = "361--367",

journal = "Astronomy & Astrophysics",

issn = "0004-6361",

publisher = "EDP Sciences",

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TY - JOUR

T1 - The FERRUM project: Branching ratios and atomic transition probabilities of Fe II transitions from the 3d6(a 3F)4p subconfiguration in the visible to VUV spectral region

AU - Pickering, J. C.

AU - Johansson, Sveneric

AU - Smith, P. L.

PY - 2001

Y1 - 2001

N2 - We report measurements of the relative intensities of 81 emission linesof Fe II between 160 nm and 350 nm (62 168 cm-1 to 28 564cm-1) from 4 levels by high resolution Fourier transformspectrometry, using a Penning discharge lamp as light source. Theserelative intensities have been used to determine the line branchingfractions, which have then been combined with accurate experimentalradiative lifetime measurements reported recently to give absolutetransition probabilities and oscillator strengths for 81 lines. Theaccuracy of these f-values is compared with other previous experimentalmeasurements, and with theoretical values. The new transitionprobabilities will allow accurate determinations of Fe II abundances ina wide variety of astrophysical objects. Tables 2 and 3 are onlyavailable in electronic form at the CDS via anonymous ftp tocdsarc.u-strasbg.fr (130.79.128.5) or viahttp://cdsweb.u-strasbg.fr/cgi-bin/qcat?J/A+A/377/361

AB - We report measurements of the relative intensities of 81 emission linesof Fe II between 160 nm and 350 nm (62 168 cm-1 to 28 564cm-1) from 4 levels by high resolution Fourier transformspectrometry, using a Penning discharge lamp as light source. Theserelative intensities have been used to determine the line branchingfractions, which have then been combined with accurate experimentalradiative lifetime measurements reported recently to give absolutetransition probabilities and oscillator strengths for 81 lines. Theaccuracy of these f-values is compared with other previous experimentalmeasurements, and with theoretical values. The new transitionprobabilities will allow accurate determinations of Fe II abundances ina wide variety of astrophysical objects. Tables 2 and 3 are onlyavailable in electronic form at the CDS via anonymous ftp tocdsarc.u-strasbg.fr (130.79.128.5) or viahttp://cdsweb.u-strasbg.fr/cgi-bin/qcat?J/A+A/377/361

KW - ATOMIC DATA

KW - LINE: IDENTIFICATION

KW - TECHNIQUES: SPECTROSCOPIC

KW - STARS: ABUNDANCES

U2 - 10.1051/0004-6361:20010943

DO - 10.1051/0004-6361:20010943

M3 - Article

SN - 0004-6361

VL - 377

SP - 361

EP - 367

JO - Astronomy & Astrophysics

JF - Astronomy & Astrophysics

ER -