The Multi-object Spectroscopy Observation of Seven Interacting Galaxy Pairs: Metallicity Gradients and Star Formation Distributions
The Multi-object Spectroscopy Observation of Seven Interacting Galaxy Pairs: Metallicity Gradients and Star Formation Distributions
复制标题
七个相互作用星系对的多目标光谱观测:金属丰度梯度和恒星形成分布
DOI:
10.1088/1538-3873/ab6714
复制
发表时间:
2020-01
影响因子:
3.5
通讯作者:
Wu Hong
中科院分区:
文献类型:
--
作者:
Zhang Bing-qing;Cao Chen;Xu Cong K.;Zhou Zhi-min;Wu Hong
We use the Multi-Object Spectroscopy system of Xinglong 2.16 m telescope to study the gradients of gas-phase oxygen abundance and the distributions of star formation activities of seven nearby interacting galaxy pairs. On the basis of emission line luminosities and flux ratios, we estimate the gas-phase metallicities (log(O/H)), excitation mechanisms, and star formation rates (SFRs) of different regions in each galaxy. The average radial slope of log(O/H) from linear fitting of galaxy pairs in our sample is significantly flatter than that of isolated disk galaxies, also the central metallicity is much lower for interacting galaxies. This supports the predictions and results of previous theoretical numerical simulations and observational works which show the cold gas inflows induced by galaxy interactions can dilute the central metallicity. From the analysis of the radial distribution of SFR surface densities (sigma(SFR)), we find that, in our sample, galaxies in Spiral-Spiral (S+S) pairs have peak sigma(SFR) at the center region and lower SFRs at the outer parts than that at the center. On the other hand, for two spirals in Spiral-Elliptical (S+E) pairs (Arp142 and J0338+2120), they both have relatively higher (sigma(SFR)) in their off-nuclei regions. This may hint a dependence of star formation distributions for paired galaxies on their companion morphologies.
登录
查看更多内容
DOI:
10.3847/1538-4365/aabd30
发表时间:
2018-04
期刊:
The Astrophysical Journal Supplement Series
影响因子:
--
作者:
P. Zuo;Cong K. Xu;M. Yun;U. Lisenfeld;Di Li;C. Cao
通讯作者:
P. Zuo;Cong K. Xu;M. Yun;U. Lisenfeld;Di Li;C. Cao
影响因子:
6.5
作者:
R. Marino;F. Rosales-Ortega;S. Sánchez;A. Paz;J. Vílchez;D. Miralles-Caballero;C. Kehrig;E. Pére
通讯作者:
R. Marino;F. Rosales-Ortega;S. Sánchez;A. Paz;J. Vílchez;D. Miralles-Caballero;C. Kehrig;E. Pére
DOI:
10.1088/0004-637x/723/2/1255
发表时间:
2010-09
期刊:
The Astrophysical Journal
影响因子:
--
作者:
D. Rupke;L. Kewley;Li-Hsin Chien
通讯作者:
D. Rupke;L. Kewley;Li-Hsin Chien
DOI:
10.1086/375398
发表时间:
2003-03
期刊:
The Astrophysical Journal
影响因子:
--
作者:
Robert C. Kennicutt Jr.;F. Bresolin;D. Garnett
通讯作者:
Robert C. Kennicutt Jr.;F. Bresolin;D. Garnett
DOI:
10.1086/507592
发表时间:
2006-07
期刊:
The Astrophysical Journal
影响因子:
--
作者:
Y. Liang;S. Yin;F. Hammer;L. Deng;H. Flores;B. Z. Naoc;C. Gepi;O. Paris-meudon;F. D. O. Physics;H. University;China
通讯作者:
Y. Liang;S. Yin;F. Hammer;L. Deng;H. Flores;B. Z. Naoc;C. Gepi;O. Paris-meudon;F. D. O. Physics;H. University;China