Matches in SemOpenAlex for { <https://semopenalex.org/work/W3100391780> ?p ?o ?g. }
- W3100391780 endingPage "794" @default.
- W3100391780 startingPage "767" @default.
- W3100391780 abstract "The UV spectrum of the bright quasar PHL 1811 at zem = 0.192 reveals a foreground gas system at z = 0.080923 with log N(H ) = 17.98 ± 0.05. We have determined the abundances of various atomic species in this system from a spectrum covering the wavelength range 1160-1730 Å recorded at 7 km s-1 resolution by the E140M grating of the Space Telescope Imaging Spectrograph (STIS) on the Hubble Space Telescope (HST), supplemented by coverage at shorter wavelengths by the Far Ultraviolet Spectroscopic Explorer (FUSE). The abundances of C II, Si II, S II, and Fe II compared to that of O I indicate that a considerable fraction of the gas is in locations where the hydrogen is ionized. An oxygen abundance [O/H] = -0.19 ± 0.08 in the H I-bearing gas indicates that the chemical enrichment of the gas is unusually high for an extragalactic QSO absorption system. However, this same material has an unusually low abundance of nitrogen, [N/O] < -0.59, indicating that there may not have been enough time during this enrichment for secondary nitrogen to arise from low- and intermediate-mass stars. From the convergence of high Lyman series lines we can determine the velocity width of H I, and after correcting for turbulent broadening shown by the O I absorption feature, we derive a temperature T = 7070 K. We determine a lower bound for the electron density n(e) > 10-3 cm-3 by modeling the ionization by the intergalactic radiation field and an upper bound n(e) < 0.07 cm-3 from the absence of much C II in an excited fine-structure level. The thermal pressure in the range 4 cm-3 K < p/k < 140 cm-3 K could be confined by a warm-hot intergalactic medium (WHIM) structure with ρ/ ~ 20 that might accompany a wall of galaxies at the same redshift, seen in data from the Sloan Digital Sky Survey. An r-band image of the field surrounding PHL 1811 recorded by the ACS instrument on HST shows that two galaxies at the same redshift as the gas are S0 galaxies, separated by only 34 and 87 h kpc from the line of sight. One or both of these galaxies may be the source of the material in the Lyman limit system, which may have been expelled from them in a fast wind, by tidal stripping, or by ram pressure stripping. Subtraction of the ACS point-spread function from the image of the QSO reveals the presence of a face-on spiral galaxy under the glare of the quasar; while it is possible that this galaxy may be responsible for the Lyman limit absorption, the exact alignment of the QSO with the center of the galaxy suggests that the spiral is the quasar host." @default.
- W3100391780 created "2020-11-23" @default.
- W3100391780 creator A5004537754 @default.
- W3100391780 creator A5009285687 @default.
- W3100391780 creator A5039259392 @default.
- W3100391780 creator A5049716126 @default.
- W3100391780 date "2005-04-20" @default.
- W3100391780 modified "2023-09-26" @default.
- W3100391780 title "A Near‐Solar Metallicity, Nitrogen‐deficient Lyman Limit Absorber Associated with Two S0 Galaxies" @default.
- W3100391780 cites W1617597187 @default.
- W3100391780 cites W1629479344 @default.
- W3100391780 cites W1762062008 @default.
- W3100391780 cites W1775309861 @default.
- W3100391780 cites W1963527304 @default.
- W3100391780 cites W1964901023 @default.
- W3100391780 cites W1966826355 @default.
- W3100391780 cites W1973096922 @default.
- W3100391780 cites W1974385880 @default.
- W3100391780 cites W1976446061 @default.
- W3100391780 cites W1979736849 @default.
- W3100391780 cites W1983763252 @default.
- W3100391780 cites W1987635305 @default.
- W3100391780 cites W1988260353 @default.
- W3100391780 cites W1992676805 @default.
- W3100391780 cites W1993217083 @default.
- W3100391780 cites W1995333740 @default.
- W3100391780 cites W1996409564 @default.
- W3100391780 cites W2001424812 @default.
- W3100391780 cites W2002751119 @default.
- W3100391780 cites W2005969891 @default.
- W3100391780 cites W2008104347 @default.
- W3100391780 cites W2011696767 @default.
- W3100391780 cites W2012156345 @default.
- W3100391780 cites W2013930140 @default.
- W3100391780 cites W2016874768 @default.
- W3100391780 cites W2017270781 @default.
- W3100391780 cites W2026619221 @default.
- W3100391780 cites W2028721339 @default.
- W3100391780 cites W2029556435 @default.
- W3100391780 cites W2032806516 @default.
- W3100391780 cites W2032937684 @default.
- W3100391780 cites W2034830473 @default.
- W3100391780 cites W2036200883 @default.
- W3100391780 cites W2036285592 @default.
- W3100391780 cites W2037648530 @default.
- W3100391780 cites W2037727700 @default.
- W3100391780 cites W2038038413 @default.
- W3100391780 cites W2039241537 @default.
- W3100391780 cites W2042051678 @default.
- W3100391780 cites W2042470708 @default.
- W3100391780 cites W2042749826 @default.
- W3100391780 cites W2044224365 @default.
- W3100391780 cites W2046228401 @default.
- W3100391780 cites W2047798125 @default.
- W3100391780 cites W2048116537 @default.
- W3100391780 cites W2048623741 @default.
- W3100391780 cites W2048970140 @default.
- W3100391780 cites W2052491072 @default.
- W3100391780 cites W2052926897 @default.
- W3100391780 cites W2053876856 @default.
- W3100391780 cites W2054872331 @default.
- W3100391780 cites W2058070600 @default.
- W3100391780 cites W2059106333 @default.
- W3100391780 cites W2059588423 @default.
- W3100391780 cites W2059961310 @default.
- W3100391780 cites W2060163524 @default.
- W3100391780 cites W2061634416 @default.
- W3100391780 cites W2062929230 @default.
- W3100391780 cites W2064888972 @default.
- W3100391780 cites W2068928940 @default.
- W3100391780 cites W2071303647 @default.
- W3100391780 cites W2072007322 @default.
- W3100391780 cites W2073811527 @default.
- W3100391780 cites W2076577536 @default.
- W3100391780 cites W2079011031 @default.
- W3100391780 cites W2079592269 @default.
- W3100391780 cites W2081805464 @default.
- W3100391780 cites W2082576984 @default.
- W3100391780 cites W2083129931 @default.
- W3100391780 cites W2085689196 @default.
- W3100391780 cites W2088363119 @default.
- W3100391780 cites W2092916207 @default.
- W3100391780 cites W2093368559 @default.
- W3100391780 cites W2094672460 @default.
- W3100391780 cites W2100461368 @default.
- W3100391780 cites W2101798377 @default.
- W3100391780 cites W2103110419 @default.
- W3100391780 cites W2111817932 @default.
- W3100391780 cites W2114860619 @default.
- W3100391780 cites W2115599890 @default.
- W3100391780 cites W2118311540 @default.
- W3100391780 cites W2120770474 @default.
- W3100391780 cites W2123924478 @default.
- W3100391780 cites W2128619048 @default.
- W3100391780 cites W2134203113 @default.
- W3100391780 cites W2135577089 @default.
- W3100391780 cites W2138898516 @default.
- W3100391780 cites W2139594802 @default.