Fine-Structure FeII* Emission and Resonant MgII Emission in z = 1 Star-Forming Galaxies

Abstract

We present a study of the prevalence, strength, and kinematics of ultraviolet FeII and MgII emission lines in 212 star-forming galaxies at z = 1 selected from the DEEP2 survey. We find FeII* emission in composite spectra assembled on the basis of different galaxy properties, indicating that FeII* emission is prevalent at z = 1. In these composites, FeII* emission is observed at roughly the systemic velocity. At z = 1, we find that the strength of FeII* emission is most strongly modulated by dust attenuation, and is additionally correlated with redshift, star-formation rate, and [OII] equivalent width, such that systems at higher redshifts with lower dust levels, lower star-formation rates, and larger [OII] equivalent widths show stronger FeII* emission. We detect MgII emission in at least 15% of the individual spectra and we find that objects showing stronger MgII emission have higher specific star-formation rates, smaller [OII] linewidths, larger [OII] equivalent widths, lower dust attenuations, and lower stellar masses than the sample as a whole. MgII emission strength exhibits the strongest correlation with specific star-formation rate, although we find evidence that dust attenuation and stellar mass also play roles in the regulation of MgII emission. Future integral field unit observations of the spatial extent of FeII* and MgII emission in galaxies with high specific star-formation rates, low dust attenuations, and low stellar masses will be important for probing the morphology of circumgalactic gas.

29 pages, 22 figures, 2 tables; accepted to ApJ

References in corpus (12)

• The Mass-Metallicity Relation at z~2
• The MUSE second-generation VLT instrument
• Ubiquitous outflows in DEEP2 spectra of star-forming galaxies at z=1.4
• The All-wavelength Extended Groth Strip International Survey (AEGIS) Data Sets
• 3D Lyman-alpha radiation transfer. I. Understanding Lyman-alpha line profile morphologies
• The Discovery of 1000 km/s Outflows in Massive Post-starburst Galaxies at z=0.6
• Galactic Outflows in Absorption and Emission: Near-UV Spectroscopy of Galaxies at 1<z<2
• The Physical Nature of Rest-UV Galaxy Morphology During the Peak Epoch of Galaxy Formation
• GMASS ultradeep spectroscopy of galaxies at z~2 - VII. Sample selection and spectroscopy
• An HST/WFC3-IR Morphological Survey of Galaxies at z = 1.5-3.6: II. The Relation between Morphology and Gas-Phase Kinematics
• Scattered Emission from z~1 Galactic Outflows
• Kinematics of Interstellar Gas in Nearby UV-Selected Galaxies Measured with HST/STIS Spectroscopy

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