2006/06/10 by Harry I. Teplitz, H. I. Teplitz, B. Siana +16
Engineering · Physics and Astronomy · #Adaptive optics and wavefront sensing #Advanced Camera for Surveys #Astronomy #Astrophysics #CCD and CMOS Imaging Sensors #Cosmic variance #Extinction (optical mineralogy) #Galaxies: Formation, Evolution, Phenomena #Galaxy #Hubble Deep Field #Hubble Deep Field South #Hubble Ultra-Deep Field #Hubble space telescope #Physics #Redshift #Space Telescope Imaging Spectrograph #Spectral line #Spectrograph #Spiral galaxy #Star formation #astro-ph
paper · pdf · doi:10.1086/505685
published as Astron.J.132:853-865,2006 · Accepted for publication in AJ
arxiv created 2006/06/10 · openalex publication_date 2006/07/07 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We present far-ultraviolet (FUV) imaging of the Hubble Deep Field-North (HDF-N) taken with the Solar Blind Channel of the Advanced Camera for Surveys (ACS SBC) and the FUV MAMA detector of the Space Telescope Imaging Spectrograph onboard the Hubble Space Telescope . The full WFPC2 deep field has been observed at 1600 Å. We detect 134 galaxies and one star down to a limit of FUV AB ∼ 29. All sources have counterparts in the WFPC2 image. Redshifts (spectroscopic or photometric) for the detected sources are in the range 0 < z < 1. We find that the FUV galaxy number counts are higher than those reported by GALEX , which we attribute at least in part to cosmic variance in the small HDF-N field of view. Six of the 13 Chandra sources at z < 0.85 in the HDF-N are detected in the FUV, and those are consistent with starbursts rather than active galactic nuclei. Cross-correlating with Spitzer sources in the field, we find that the FUV detections show general agreement with the expected L IR / L UV versus β relationship. We infer star formation rates (SFRs), corrected for extinction using the UV slope, and find a median value of 0.3 M ⊙ yr -1 for FUV-detected galaxies, with 75% of detected sources having SFR < 1 M ⊙ yr -1 . Examining the morphological distribution of sources, we find that about half of all FUV-detected sources are identified as spiral galaxies. Half of morphologically selected spheroid galaxies at z < 0.85 are detected in the FUV, suggesting that such sources have had significant ongoing star formation in the epoch since z ∼ 1.