气候变化领域集成服务门户(CCPortal): HETDEX Pilot Survey. VI. Emitters and Expectations for a Local Sample of Star-forming Galaxies in HETDEX

CCPortal

DOI	10.3847/1538-4357/ab3df7
	HETDEX Pilot Survey. VI. Emitters and Expectations for a Local Sample of Star-forming Galaxies in HETDEX
	Indahl B.; Zeimann G.; Hill G.J.; Finkelstein S.L.; Ciardullo R.; Bridge J.S.; Chonis T.; Drory N.; Gronwall C.; Lee H.; McQuinn K.
发表日期	2019
ISSN	0004637X
卷号	883 期号:2
英文摘要	We assemble an unbiased sample of 29 galaxies with [O ii] λ3727 and/or [O iii] λ5007 detections at z < 0.15 from the Hobby-Eberly Telescope Dark Energy Experiment (HETDEX) Pilot Survey (HPS). The HPS finds galaxies without preselection based on their detected emission lines via integral field spectroscopy. Sixteen of these objects were followed up with the second-generation, low-resolution spectrograph on the upgraded HET. Oxygen abundances were then derived via strong emission lines using a Bayesian approach. We find that most of the galaxies fall along the mass-metallicity relation derived from photometrically selected star-forming galaxies in the Sloan Digital Sky Survey (SDSS). However, two of these galaxies have low metallicity (similar to the very rare green pea galaxies in mass-metallicity space). The star formation rates (SFRs) of this sample fall in an intermediate space between the SDSS star-forming main sequence and the extreme green pea galaxies. We conclude that spectroscopic selection fills a part of the mass-metallicity-SFR phase space that is missed in photometric surveys with preselection like SDSS; i.e., we find galaxies that are actively forming stars but are faint in continuum. We use the results of this pilot investigation to make predictions for the upcoming unbiased, large spectroscopic sample of local line emitters from HETDEX. With the larger HETDEX survey, we will determine if galaxies selected spectroscopically without continuum brightness preselection have metallicities that fall on a continuum that bridges typical star-forming and rarer, more extreme systems like green peas.. The American Astronomical Society. All rights reserved.
英文关键词	galaxies: abundances; galaxies: evolution; galaxies: fundamental parameters; surveys; techniques: spectroscopic
来源期刊	Astrophysical Journal
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/176338
作者单位	Astronomy Department, University of Texas, Austin, TX 78712, United States; Hobby-Eberly Telescope, University of Texas, Austin, TX 78712, United States; McDonald Observatory, University of Texas, Austin, TX 78712, United States; Department of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802, United States; Institute for Gravitation and the Cosmos, Pennsylvania State University, University Park, PA 16802, United States; Department of Physics and Astronomy, University of Louisville, Louisville, KY 40292, United States; Ball Aerospace, Boulder, CO 80301, United States
推荐引用方式 GB/T 7714	Indahl B.,Zeimann G.,Hill G.J.,et al. HETDEX Pilot Survey. VI. Emitters and Expectations for a Local Sample of Star-forming Galaxies in HETDEX[J],2019,883(2).
APA	Indahl B..,Zeimann G..,Hill G.J..,Finkelstein S.L..,Ciardullo R..,...&McQuinn K..(2019).HETDEX Pilot Survey. VI. Emitters and Expectations for a Local Sample of Star-forming Galaxies in HETDEX.Astrophysical Journal,883(2).
MLA	Indahl B.,et al."HETDEX Pilot Survey. VI. Emitters and Expectations for a Local Sample of Star-forming Galaxies in HETDEX".Astrophysical Journal 883.2(2019).