Far infrared spectroscopy of star-forming galaxies: Expectations for the Herschel Space Observatory

S. Malhotra

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

ISO has enabled far-infrared spectroscopy of a variety of galaxies. Using the [CII] (158 μm) and [OI](63 μm) lines, we can characterize the physical conditions in the star-forming ISM. These observations also form the basis of our expectations for what the Herschel Space Observatory will observe for high redshift galaxies. While [CII] is suppressed in ULIRGs and normal galaxies with high dust temperatures, it is stronger than expected in metal poor galaxies by factors of a few. Young galaxies at high redshifts might be expected to be both metal poor and actively star-forming, leading to contrary expectations for the [CII] line strength. The best prediction for [CII] detection is derived by using the observed proportionality between [CII] and mid-IR emission from PAHs. Using the observed [CII]/7 μm ratio and number counts from ISO deep surveys we predict that HSO will be able to detect 100 sources/square-degree in the [CII] line.

Original languageEnglish (US)
Title of host publicationEuropean Space Agency, (Special Publication) ESA SP
Pages155-158
Number of pages4
Edition460
StatePublished - 2001
Externally publishedYes
EventThe Promise of the Herschel Space Observatory - Toledo, Spain
Duration: Dec 12 2000Dec 15 2000

Other

OtherThe Promise of the Herschel Space Observatory
CountrySpain
CityToledo
Period12/12/0012/15/00

Keywords

  • Galaxies: formation
  • Missions: FIRST
  • Stars: formation

ASJC Scopus subject areas

  • Aerospace Engineering

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    Malhotra, S. (2001). Far infrared spectroscopy of star-forming galaxies: Expectations for the Herschel Space Observatory. In European Space Agency, (Special Publication) ESA SP (460 ed., pp. 155-158)