气候变化领域集成服务门户(CCPortal): The Hα Dots Survey. II. A Second List of Faint Emission-line Objects

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DOI	10.3847/1538-3881/abba11
	The Hα Dots Survey. II. A Second List of Faint Emission-line Objects
	Salzer J.J.; Feddersen J.R.; Derloshon K.; Gronwall C.; Sistine A.V.; Sugden A.; Janowiecki S.; Hirschauer A.S.; Kellar J.A.
发表日期	2020
ISSN	46256
卷号	160 期号:5
英文摘要	We present the second catalog of serendipitously discovered compact extragalactic emission-line sources - Hα Dots. These objects have been discovered in searches of moderately deep narrow-band images acquired for the ALFALFA Hα project. In addition to cataloging 119 new Hα Dots, we also present follow-up spectral data for the full sample. These spectra allow us to confirm the nature of these objects as true extragalactic emission-line objects, to classify them in terms of activity type (star-forming or AGN), and to identify the emission line via which they were discovered. We tabulate photometric and spectroscopic data for the all objects, and we present an overview of the properties of the full Hα Dot sample. The Hα Dots represent a broad range of star-forming and active galaxies detected via several different emission lines over a wide range of redshifts. The sample includes Hα-detected blue compact dwarf galaxies at low redshift, [O iii]-detected Seyfert 2 and Green Pea-like galaxies at intermediate redshifts, and QSOs detected via one of several UV emission lines, including Lyα. Despite the heterogeneous appearance of the resulting catalog of objects, we show that our selection method leads to well-defined samples of specific classes of emission-line objects with properties that allow for statistical studies of each class. © 2020. The American Astronomical Society. All rights reserved.
来源期刊	Astronomical Journal
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/176765
作者单位	Department of Astronomy, Indiana University, 727 East Third Street, Bloomington, IN 47405, United States; Department of Astronomy, Yale University, P.O. Box 208101, New Haven, CT 06520, 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; Center for Gravitation Cosmology and Astrophysics, University of Wisconsin-Milwaukee, 3135 N Maryland Ave, Milwaukee, WI 53211, United States; University of Texas at Austin, McDonald ObservatoryTX 79734, United States; Space Telescope Science Institute, 3700 San Martin Dr., Baltimore, MD 21218, United States; Department of Physics and Astronomy, Dartmouth College, Hanover, NH 03755, United States
推荐引用方式 GB/T 7714	Salzer J.J.,Feddersen J.R.,Derloshon K.,et al. The Hα Dots Survey. II. A Second List of Faint Emission-line Objects[J],2020,160(5).
APA	Salzer J.J..,Feddersen J.R..,Derloshon K..,Gronwall C..,Sistine A.V..,...&Kellar J.A..(2020).The Hα Dots Survey. II. A Second List of Faint Emission-line Objects.Astronomical Journal,160(5).
MLA	Salzer J.J.,et al."The Hα Dots Survey. II. A Second List of Faint Emission-line Objects".Astronomical Journal 160.5(2020).