Discovery of diffuse optical emission lines from the inner Galaxy: Evidence for LI(N)ER-like gas
Discovery of diffuse optical emission lines from the inner Galaxy: Evidence for LI(N)ER-like gas
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发现来自银河系内部的漫射光发射线:类 LI(N)ER 气体的证据
DOI:
10.1126/sciadv.aay9711
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发表时间:
2020
期刊:
影响因子:
13.6
通讯作者:
Haffner, L. M.
中科院分区:
文献类型:
--
作者:
Krishnarao, D.;Benjamin, R. A.;Haffner, L. M.
Optical emission lines are used to categorize galaxies into three groups according to their dominant central radiation source: active galactic nuclei, star formation, or low-ionization (nuclear) emission regions [LI(N)ERs] that may trace ionizing radiation from older stellar populations. Using the Wisconsin H-Alpha Mapper, we detect optical line emission in low-extinction windows within eight degrees of Galactic Center. The emission is associated with the 1.5-kiloparsec-radius “Tilted Disk” of neutral gas. We modify a model of this disk and find that the hydrogen gas observed is at least 48% ionized. The ratio [NII] λ6584 angstroms/Hα λ6563 angstroms increases from 0.3 to 2.5 with Galactocentric radius; [OIII] λ5007 angstroms and Hβ λ4861 angstroms are also sometimes detected. The line ratios for most Tilted Disk sightlines are characteristic of LI(N)ER galaxies.
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DOI:
--
发表时间:
2016
期刊:
影响因子:
--
作者:
Kyle Barbary
通讯作者:
Kyle Barbary
影响因子:
6.5
作者:
Ben Bekhti, N.;Floer, L.;Staveley-Smith, L.
通讯作者:
Staveley-Smith, L.
影响因子:
6.5
作者:
S. Geier;R. Østensen;P. Németh;N. G. Fusillo;B. Gänsicke;J. Telting;E. M. Green;J. Schaffenroth
通讯作者:
S. Geier;R. Østensen;P. Németh;N. G. Fusillo;B. Gänsicke;J. Telting;E. M. Green;J. Schaffenroth
DOI:
10.1086/147313
发表时间:
1962
期刊:
The Astrophysical Journal
影响因子:
--
作者:
E. Burbidge;G. Burbidge
通讯作者:
G. Burbidge
DOI:
10.21105/joss.01940
发表时间:
2019
期刊:
J. Open Source Softw.
影响因子:
--
作者:
D. Krishnarao
通讯作者:
D. Krishnarao