干旱区生态环境知识资源中心(Arid): Diffuse LINER-type emission from extended disc regions of barred galaxies

Arid

DOI	10.1093/mnras/staa1369
	Diffuse LINER-type emission from extended disc regions of barred galaxies
	Percival, S. M.; James, P. A.
通讯作者	Percival, SM
来源期刊	MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
ISSN	0035-8711
EISSN	1365-2966
出版年	2020
卷号	496 期号:1 页码:36-48
英文摘要	We present a spectroscopic analysis of the central disc regions of barred spiral galaxies, concentrating on the region that is swept by the bar but not including the bar itself (the 'star formation desert' or SFD region). New spectroscopy is presented for 34 galaxies, and the full sample analysed comprises 48 SBa-SBcd galaxies. These data confirm the full suppression of SF within the SFD regions of all but the latest type (SBcd) galaxies. However, diffuse [N II] and H alpha line emission is detected in all galaxies. The ubiquity and homogeneous properties of this emission from SBa to SBc galaxies favour post-asymptotic giant branch (p-AGB) stars as the source of this line excitation, rather than extreme blue horizontal branch stars. The emission-line ratios strongly exclude any contribution from recent SF, but are fully consistent with recent population synthesis modelling of p-AGB emission by other authors, and favour excitation dominated by ambient gas of approximately solar abundance, rather than ejecta from the AGB stars themselves. The line equivalent widths are also larger than those observed in many fully passive (e.g. elliptical) galaxies, which may also be a consequence of a greater ambient gas density in the SFD regions.
英文关键词	galaxies: active galaxies: spiral galaxies: stellar content galaxies: structure
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000560784700004
WOS关键词	STAR-FORMATION ; IONIZED-GAS ; H-ALPHA ; SPATIAL-DISTRIBUTION ; SECULAR EVOLUTION ; HYDROGENIC IONS ; HOST GALAXIES ; CLASSIFICATION ; ORIGIN ; AGES
WOS类目	Astronomy & Astrophysics
WOS研究方向	Astronomy & Astrophysics
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/325700
作者单位	[Percival, S. M.; James, P. A.] Liverpool John Moores Univ, Astrophys Res Inst, IC2,Liverpool Sci Pk,146 Brownlow Hill, Liverpool L3 5RF, Merseyside, England
推荐引用方式 GB/T 7714	Percival, S. M.,James, P. A.. Diffuse LINER-type emission from extended disc regions of barred galaxies[J],2020,496(1):36-48.
APA	Percival, S. M.,&James, P. A..(2020).Diffuse LINER-type emission from extended disc regions of barred galaxies.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,496(1),36-48.
MLA	Percival, S. M.,et al."Diffuse LINER-type emission from extended disc regions of barred galaxies".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 496.1(2020):36-48.