Abundance and isotopic anomalies of thallium in the atmosphere of the HgMn star chi Lupi
(1996) In Astrophysical Journal 462(2). p.937-942- Abstract
- We announce the detection of two fully resolved hyperfine components of the intercombination line of Tl II (Z = 81) at 1908.6 Angstrom in the ultraviolet spectrum of the sharp-lined, nonmagnetic, chemically peculiar star chi Lupi (BB.5pHgMn + A2 Vm). The wavelengths and profiles of these absorption lines strongly suggest that they arise from the heaviest isotope, Tl-205. The echelle observations were obtained with the Hubble Space Telescope Goddard High Resolution Spectrograph (HST/GHRS). Spectrum synthesis fits to the line profiles yield a logarithmic overabundance of thallium, relative to the solar system abundance, of +3.8 dex. We believe this to be the first detection of thallium in a star other than the Sun. It is also the first time... (More)
- We announce the detection of two fully resolved hyperfine components of the intercombination line of Tl II (Z = 81) at 1908.6 Angstrom in the ultraviolet spectrum of the sharp-lined, nonmagnetic, chemically peculiar star chi Lupi (BB.5pHgMn + A2 Vm). The wavelengths and profiles of these absorption lines strongly suggest that they arise from the heaviest isotope, Tl-205. The echelle observations were obtained with the Hubble Space Telescope Goddard High Resolution Spectrograph (HST/GHRS). Spectrum synthesis fits to the line profiles yield a logarithmic overabundance of thallium, relative to the solar system abundance, of +3.8 dex. We believe this to be the first detection of thallium in a star other than the Sun. It is also the first time hyperfine structure has been resolved in the satellite ultraviolet spectrum of an astrophysical source. The large overabundance and the presence of only the heaviest isotope of the element continue the pattern observed previously in chi Lup for platinum (Z = 78), gold (Z = 79), and mercury (Z = 80). (Less)
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https://lup.lub.lu.se/record/3919587
- author
- Leckrone, DS ; Johansson, Sveneric LU ; Kalus, Gabriele LU ; Wahlgren, Glenn LU ; Brage, Tomas LU and Proffitt, CR
- organization
- publishing date
- 1996
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- abundances, individual (chi Lupi), stars, peculiar
- in
- Astrophysical Journal
- volume
- 462
- issue
- 2
- pages
- 937 - 942
- publisher
- American Astronomical Society
- external identifiers
-
- wos:A1996UH18700034
- scopus:21344468296
- ISSN
- 0004-637X
- DOI
- 10.1086/177206
- language
- English
- LU publication?
- yes
- id
- 4057059b-6693-43a1-bdab-f81faca7cc67 (old id 3919587)
- date added to LUP
- 2016-04-01 16:08:16
- date last changed
- 2024-01-11 02:08:23
@article{4057059b-6693-43a1-bdab-f81faca7cc67, abstract = {{We announce the detection of two fully resolved hyperfine components of the intercombination line of Tl II (Z = 81) at 1908.6 Angstrom in the ultraviolet spectrum of the sharp-lined, nonmagnetic, chemically peculiar star chi Lupi (BB.5pHgMn + A2 Vm). The wavelengths and profiles of these absorption lines strongly suggest that they arise from the heaviest isotope, Tl-205. The echelle observations were obtained with the Hubble Space Telescope Goddard High Resolution Spectrograph (HST/GHRS). Spectrum synthesis fits to the line profiles yield a logarithmic overabundance of thallium, relative to the solar system abundance, of +3.8 dex. We believe this to be the first detection of thallium in a star other than the Sun. It is also the first time hyperfine structure has been resolved in the satellite ultraviolet spectrum of an astrophysical source. The large overabundance and the presence of only the heaviest isotope of the element continue the pattern observed previously in chi Lup for platinum (Z = 78), gold (Z = 79), and mercury (Z = 80).}}, author = {{Leckrone, DS and Johansson, Sveneric and Kalus, Gabriele and Wahlgren, Glenn and Brage, Tomas and Proffitt, CR}}, issn = {{0004-637X}}, keywords = {{abundances; individual (chi Lupi); stars; peculiar}}, language = {{eng}}, number = {{2}}, pages = {{937--942}}, publisher = {{American Astronomical Society}}, series = {{Astrophysical Journal}}, title = {{Abundance and isotopic anomalies of thallium in the atmosphere of the HgMn star chi Lupi}}, url = {{http://dx.doi.org/10.1086/177206}}, doi = {{10.1086/177206}}, volume = {{462}}, year = {{1996}}, }