A New Population of High Redshift, Dusty Lyman-Alpha Emitters and Blobs Discovered by WISE

Abstract

We report a new technique to select 1.6<z<4.6 dusty Lyman-alpha emitters (LAEs), over a third of which are `blobs' (LABs) with emission extended on scales of 30-100kpc. Combining data from the NASA Wide-field Infrared Survey Explorer (WISE) mission with optical spectroscopy from the W.M. Keck telescope, we present a color criteria that yields a 78% success rate in identifying rare, dusty LAEs of which at least 37% are LABs. The objects have a surface density of only ~0.1 per square degree, making them rare enough that they have been largely missed in narrow surveys. We measured spectroscopic redshifts for 92 of these WISE-selected, typically radio-quiet galaxies and find that the LAEs (LABs) have a median redshift of 2.3 (2.5). The WISE photometry coupled with data from Herschel reveals that these galaxies have extreme far-infrared luminosities (L_IR>10^{13-14}L_sun) and warm colors, typically larger than submillimeter-selected galaxies (SMGs) and dust-obscured galaxies (DOGs). These traits are commonly associated with the dust being energized by intense AGN activity. We hypothesize that the combination of spatially extended Lyman-alpha, large amounts of warm IR-luminous dust, and rarity (implying a short-lived phase) can be explained if the galaxies are undergoing strong `feedback' transforming them from an extreme dusty starburst to a QSO.

Submitted to ApJ Letters, 6 pages, 4 figures. Comments welcome

References in corpus (12)

• Ly-alpha Emission-Line Galaxies at z = 3.1 in the Extended Chandra Deep Field South
• A Significant Population of Very Luminous Dust-Obscured Galaxies at Redshift z ~ 2
• The First Hyper-Luminous Infrared Galaxy Discovered by WISE
• Submillimeter Follow-up of WISE-Selected Hyperluminous Galaxies
• High-resolution radio observations of submillimetre galaxies
• Evidence for Cold Accretion onto a Massive Galaxy at High Redshift?
• The Overdense Environment of a Large Lyman-alpha Nebula at z~2.7
• Strong PAH Emission from z~2 ULIRGs
• Feedback-Driven Evolution of the Far-Infrared Spectral Energy Distributions of Luminous and Ultraluminous Infrared Galaxies
• Infrared and millimetre-wavelength evidence for cold accretion within a z = 2.83 Lyman-alpha blob
• A Successful Broad-band Survey for Giant Lya Nebulae II: Spectroscopic Confirmation
• An 80-kpc Lyman-alpha halo around a high redshift type-2 QSO

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