A dataset provided by the European Space Agency

Name 12249
Title Reionization of Intergalactic Helium at the Highest Redshifts
URL https://hst.esac.esa.int/ehst/#/pages/search;proposal=12249;TAPCLIENT=DOI
DOI https://doi.org/10.5270/esa-8xibm1q
Author Zheng
Description This is a scientific proposal for HST mission. For specific information please visit https://archive.stsci.edu/proposal_search.php?id=12249&mission=hst
Publication
  • Characteristics of He II Proximity Profiles
  • Dating individual quasars with the He II proximity effect
  • Early and Extended Helium Reionization over More Than 600 Million Years of Cosmic Time
  • Evidence for short ~ 1 Myr lifetimes from the He II proximity zones of z ~ 4 quasars
  • He II Lyb Gunn-Peterson Absorption: New HST Observations and Theoretical Expectations
  • Helium Reionization Simulations. III. The Helium Lya Forest
  • Statistical Detection of the He II Transverse Proximity Effect: Evidence for Sustained Quasar Activity for >25 Million Years
  • The Evolution of the He II-ionizing Background at Redshifts 2.3 < z < 3.8 Inferred from a Statistical Sample of 24 HST/COS He II Lya Absorption Spectra
  • The first measurement of the quasar lifetime distribution
Instrument COS, COS/FUV, COS/NUV
Temporal Coverage 2010-11-29T06:44:47Z/2011-05-08T15:24:14Z
Version 1.0
Mission Description Launched in 1990, the NASA/ESA Hubble Space Telescope remains the premier UV and visible light telescope in orbit. With well over 1.6 million observations from 10 different scientific instruments, the ESA Hubble Science Archive is a treasure trove of astronomical data to be exploited.
Creator Contact https://support.cosmos.esa.int/esdc/index.php?/Tickets/Submit
Date Published 2012-12-23T13:16:48Z
Last Update 2026-03-09
Keywords Hubble Space Telescope data, HST observations dataset, NASA ESA Hubble mission data, space-based optical imaging data, ultraviolet astronomy observations, near-infrared imaging dataset, Hubble spectroscopy data, Wide Field Camera 3 WFC3 data, Advanced Camera for Surveys ACS data, Space Telescope Imaging Spectrograph STIS data, Cosmic Origins Spectrograph COS data, Hubble deep field imaging dataset, extragalactic survey observations, galaxy evolution imaging data, star formation observations HST, stellar photometry dataset, globular cluster imaging data, supernova Hubble observations, exoplanet transit HST data, interstellar medium spectroscopy data, calibrated level 2 HST data products, drizzled image mosaics, FITS files astronomy, flux-calibrated spectra, photometric time-series Hubble data, redshift measurements dataset, Hubble Legacy Archive data, Mikulski Archive for Space Telescopes MAST dataset
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, Zheng, 2012, 'Reionization of Intergalactic Helium at the Highest Redshifts', 1.0, European Space Agency, https://doi.org/10.5270/esa-8xibm1q