tokens: with the yellow shades. The light-gray shades represent the 3 σ noise levels. The dark-gray shades present the wavelength range of bright sky lines and bad pixels. Left: HETDEX Fiber positions atop the broadband images taken with CFHT/MegaCam or HST/WFC3. The red, blue, green, and yellow circles present the positions and the sky coverage of the fibers used for the measurements of the LAE spectra. Figure 17. Same as Figure 11 , but for the H i radial profile around LAE1–4 in the the extreme QSO overdensity EGS–QO1 (red circles). The blue and black circles are the H i radial profiles of LAEs in the blank fields: the blue circles are the remaining 22 EGS LAEs that reside outside of the EGS–QO1 (i.e., EGS outside), and the black circles are the COSMOS LAEs. A significant H i transmission underdensity is identified around LAE1–4, which is similar to the one around the QSOs in EGS–QO1 (Figure 15 ). We find that one of the four LAEs, LAE4, shows triple-continuum components over the scale of a 10 pkpc radius circle on the HST F814W/F160W images of the EGS, indicative of a triple merging system (middle/bottom panels of Figure 18 ). LAE4 is located at (R.A., decl.) = (14:19:13.02, +52:49:11.2) near the center of the ionized bubble of EGS–QO1 (bottom panel of Figure 13 ). The average Ly α redshift of LAE4 over the HETDEX fibers is , and the total Ly α luminosity over the fibers is erg s −1 . The top panel of Figure 18 presents the spectrum of LAE4, summed over the fibers, which is the same as the one in Figure 16 . The spectrum of LAE4 has a broad Ly α emission line whose FWHM is ∼1100 km s −1 (about 3 times broader than the instrumental resolution), possibly suggesting a type I AGN (e.g., Kakuma et al. in preparation). 24 24 Other AGN features of high-ionization emission lines, C iv and He ii , are not detected in the LAE4 spectrum shown in Figure 16 . This is probably because the LAE4 is optically faint (∼25 mag) and its metal lines are too faint to be identified. The bottom panel of Figure 18 presents the positions and the sky coverage of the fibers used for the measurements of the LAE4 Ly α redshift and total luminosity and indicates that three fibers cover the triple-continuum components with the blue, green, and yellow circles. The spectra of these three fibers are shown on the right-hand side in Figure 18 . All of the three fiber spectra of the blue, green, and yellow circles have Ly α emission lines at , suggesting that the three objects probably reside at the same redshift. Moreover, these three fiber spectra have broad Ly α emission lines with an FWHM of ∼1000 km s −1 . Although each of these fibers does not separately cover one of the triple-continuum components, whose blending due to the HET image quality and large fiber diameter may produce apparent broad lines, these broad Ly α emission lines found in the different positions over the triple-continuum components imply that the LAE4 system could be a merging type I AGN doublet or
ner_tags: O O O O O O O O O O O O O O O O O O O O O O O O O O O O B-Instrument O O O O O O O O B-Telescope O B-Telescope O O O O O O O O O O O O O O O O O O O O O O O B-Wavelength O O O O O O O O O O O O O O O O B-CelestialObject O O O O O O B-CelestialObject O O O O O O O O O O O O O O B-Wavelength O O O O O O O O O O O O B-Wavelength O O O O O B-CelestialObject O O O O O O O O O B-Survey B-Wavelength O O O O O O O O O B-CelestialObject O O O O O O O O O O B-CelestialObject O O O O O O O O O O B-Wavelength B-CelestialObject O O O O O O O O O O O O O O B-Telescope B-Wavelength O O O O O O O O O O O O O O O O B-CelestialObject O O O B-CelestialRegion I-CelestialRegion I-CelestialRegion I-CelestialRegion I-CelestialRegion O O O O O O O O B-CelestialObject O O O O O O O O B-Wavelength I-Wavelength O O B-CelestialObject O O B-Instrument O O O O O O B-Wavelength I-Wavelength O O O O O O O O O O O O O O O O O O O B-CelestialObject O O O O O O O O O O O O O O O O O O B-CelestialObject O O O B-Wavelength I-Wavelength O O O O O O O O O O O O O O O O O O O O O O O O B-Citation I-Citation I-Citation I-Citation I-Citation O O O O O O O O O O O O O O O O O O O O B-CelestialObject O O O O O O O O O O O B-CelestialObject O B-Wavelength O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O B-CelestialObject B-Wavelength I-Wavelength O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O B-Wavelength I-Wavelength O O O O O O O O O O O O O O O O O O O O O O B-Wavelength I-Wavelength O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O B-Instrument O O O O O O O O O O O O O B-Wavelength I-Wavelength O O O O O O O O O O O O O O B-CelestialObject O O O O O O O O O O