Discovery of kpc-scale line emission in barred galaxies, not linked to AGN or star formation.
Discovery of kpc-scale line emission in barred galaxies, not linked to AGN or star formation.
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在棒状星系中发现 kpc 尺度线发射,与活动星系核或恒星形成无关。
DOI:
10.1093/mnras/stv846
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发表时间:
2015
影响因子:
4.8
通讯作者:
James P
中科院分区:
文献类型:
--
作者:
James P
We present an analysis of the optical line emission from nearby barred galaxies, and in particular look at the radial range occupied by the bar. In many cases, this region is marked by what we term a ‘star formation desert’, with a marked deficit of Hiiregions in optical narrow-band H α imaging. Here we present long-slit spectroscopy revealing that such regions do have line emission, but that it is low-level, spatially smooth and almost ubiquitous. The relative strengths of the H α and the spectrally adjacent [Nii] lines in the regions are completely discrepant from those associated with star formation regions, and more closely match expectations for ‘LINER’ regions. We quantify the total line emission from these extended, kpc-scale regions, and determine the spurious contribution it would make to the determined star formation rate of these galaxies if interpreted as normal H α emission. We concur with previous studies that link this ‘LINER’ emission to old stellar populations, e.g. post-asymptotic giant branch stars, and propose strongly barred early-type spirals as a prime location for further tests of such emission.
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DOI:
10.1051/0004-6361/201322062
发表时间:
2013-08
期刊:
Proceedings of the International Astronomical Union
影响因子:
--
作者:
R. Singh;G. Ven;K. Jahnke;M. Lyubenova;J. Falcón-Barroso;J. Falcón-Barroso;João Alves;R. C. Fernandes;L. Galbany;R. García-Benito;B. Husemann;R. Kennicutt;R. Marino;I. Márquez;J. Masegosa;D. Mast;A. Pasquali;Sebastián F. Sánchez;J. Walcher;Vivienne Wild;L. Wisotzki;B. Ziegler
通讯作者:
R. Singh;G. Ven;K. Jahnke;M. Lyubenova;J. Falcón-Barroso;J. Falcón-Barroso;João Alves;R. C. Fernandes;L. Galbany;R. García-Benito;B. Husemann;R. Kennicutt;R. Marino;I. Márquez;J. Masegosa;D. Mast;A. Pasquali;Sebastián F. Sánchez;J. Walcher;Vivienne Wild;L. Wisotzki;B. Ziegler
DOI:
10.1088/0067-0049/211/2/17
发表时间:
2014
期刊:
The Astrophysical Journal Supplement Series
影响因子:
--
作者:
Ahn C
通讯作者:
Ahn C
DOI:
10.1086/300193
发表时间:
1998
期刊:
The Astronomical Journal
影响因子:
--
作者:
J. Higdon;R. Buta;G. Purcell
通讯作者:
G. Purcell
影响因子:
6.5
作者:
M. Bremer;J. Scharwachter;A. Eckart;M. Valencia;J. Zuther;F. Combes;S. García;S. Fischer
通讯作者:
S. Fischer