Spatially resolved millimeter spectroscopy of the gravitational lens PKS 1830-211

Jonathan J. Swift, William J. Welch, Brenda Louise Frye

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

This paper presents data from the BIMA interferometer showing spatially resolved absorption spectra of the gravitationally lensed quasar PKS 1830-211. High-resolution (1.2 km s-1) spectra were taken in two spectral windows centered on the redshifted frequencies of the HCO+(2 ← 1) and HCN(2 ← 1) molecular transitions. There is no molecular absorption in the northeast image, but the southwest image reveals optically thick absorbing gas at these transition frequencies. Further analyses conclude that the spectra are consistent with completely saturated absorption in the southwest image, and the line profiles suggest that the absorbing medium is complex, perhaps containing multiple components and small-scale structure. The absorption occurs along a pencil beam through the lensing galaxy which is thought to be a late-type spiral oriented almost face-on. However, the spectra show absorption spanning more than 60 km s-1, which is difficult to explain for this scenario.

Original languageEnglish (US)
JournalAstrophysical Journal
Volume549
Issue number1 PART 2
DOIs
StatePublished - Mar 1 2001
Externally publishedYes

Fingerprint

gravitational lenses
spectroscopy
absorption spectrum
absorption spectra
pencil beams
molecular absorption
interferometer
quasars
interferometers
galaxies
high resolution
profiles
gases
gas

Keywords

  • Galaxies: ISM
  • Gravitational lensing
  • ISM: Molecules
  • Quasars: Individual (PKS 1830-211)

ASJC Scopus subject areas

  • Space and Planetary Science

Cite this

Spatially resolved millimeter spectroscopy of the gravitational lens PKS 1830-211. / Swift, Jonathan J.; Welch, William J.; Frye, Brenda Louise.

In: Astrophysical Journal, Vol. 549, No. 1 PART 2, 01.03.2001.

Research output: Contribution to journalArticle

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abstract = "This paper presents data from the BIMA interferometer showing spatially resolved absorption spectra of the gravitationally lensed quasar PKS 1830-211. High-resolution (1.2 km s-1) spectra were taken in two spectral windows centered on the redshifted frequencies of the HCO+(2 ← 1) and HCN(2 ← 1) molecular transitions. There is no molecular absorption in the northeast image, but the southwest image reveals optically thick absorbing gas at these transition frequencies. Further analyses conclude that the spectra are consistent with completely saturated absorption in the southwest image, and the line profiles suggest that the absorbing medium is complex, perhaps containing multiple components and small-scale structure. The absorption occurs along a pencil beam through the lensing galaxy which is thought to be a late-type spiral oriented almost face-on. However, the spectra show absorption spanning more than 60 km s-1, which is difficult to explain for this scenario.",
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N2 - This paper presents data from the BIMA interferometer showing spatially resolved absorption spectra of the gravitationally lensed quasar PKS 1830-211. High-resolution (1.2 km s-1) spectra were taken in two spectral windows centered on the redshifted frequencies of the HCO+(2 ← 1) and HCN(2 ← 1) molecular transitions. There is no molecular absorption in the northeast image, but the southwest image reveals optically thick absorbing gas at these transition frequencies. Further analyses conclude that the spectra are consistent with completely saturated absorption in the southwest image, and the line profiles suggest that the absorbing medium is complex, perhaps containing multiple components and small-scale structure. The absorption occurs along a pencil beam through the lensing galaxy which is thought to be a late-type spiral oriented almost face-on. However, the spectra show absorption spanning more than 60 km s-1, which is difficult to explain for this scenario.

AB - This paper presents data from the BIMA interferometer showing spatially resolved absorption spectra of the gravitationally lensed quasar PKS 1830-211. High-resolution (1.2 km s-1) spectra were taken in two spectral windows centered on the redshifted frequencies of the HCO+(2 ← 1) and HCN(2 ← 1) molecular transitions. There is no molecular absorption in the northeast image, but the southwest image reveals optically thick absorbing gas at these transition frequencies. Further analyses conclude that the spectra are consistent with completely saturated absorption in the southwest image, and the line profiles suggest that the absorbing medium is complex, perhaps containing multiple components and small-scale structure. The absorption occurs along a pencil beam through the lensing galaxy which is thought to be a late-type spiral oriented almost face-on. However, the spectra show absorption spanning more than 60 km s-1, which is difficult to explain for this scenario.

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