The acs grism mode and acs grism observations of deep fields and high z ly-α galaxies

Nor Pirzkal, Sangeeta Malhotra, James Rhoads, Chun Xu, Grapes Team

Research output: Contribution to journalConference articlepeer-review


The ACS grism mode offers an unprecedented opportunity to obtain slit-less, highly multiplexed, spectroscopic observations down to very faint magnitudes. In this paper, we show that by selecting objects in a deep field based in the spectra of these objects rather than their broad band colors, a more accurate object selection can be performed. The ACS grism mode enabled us to identify faint, young, and low mass (≈106 –108 M) galaxies at 4.0 <z <5.7, that are likely to be the building blocks leading to the assembly of the more massive galaxies that we observed in the present universe.

Original languageEnglish (US)
Pages (from-to)237-241
Number of pages5
JournalAstrophysics and Space Science Proceedings
Issue number202479
StatePublished - 2010
Event41st Symposium of the European Space Agency : The Impact of HST on European Astronomy, 2007 - Noordwijk, Netherlands
Duration: May 29 2007Jun 1 2007

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Computer Science Applications
  • Spectroscopy
  • Space and Planetary Science
  • Nuclear and High Energy Physics


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