| Name | OT1_bweiner_1 |
| Title | Physical conditions in disky U/LIRGs from C II and O I spectra - low-z analogs for high-z starforming galaxies |
| URL | http://archives.esac.esa.int/hsa/whsa-tap-server/data?retrieval_type=OBSERVATION&observation_id=1342211540&instrument_name=PACS&product_level=LEVEL0&compress=true |
| DOI | https://doi.org/10.5270/esa-w6hp90u |
| Author | weiner, b. |
| Description | We propose to use Herschel/PACS spectroscopy of the C II 158 micronand O I 63 micron lines to observe a sample of 16 low-redshiftinfrared-luminous galaxies, at log L_IR = 11.8 to 12.3 Lsolar, that aredistinguished by large size and non-merger structure. These galaxiesare interesting because they have high star formation rate activityspread over a large physical area, rather than concentrated intoextremely dense regions as in the nucleus of a major merger, as in mostlocal ULIRGs. They are potentially good analogs for high-redshiftIR-luminous galaxies, which appear to have far-IR spectral shapesdifferent from local ULIRGs. C II is a major cooling line inphoto-dissociation regions and O I and C II probe the physicalconditions and UV intensity in IR-emitting regions. In a few extremelensed high-z ULIRGs where C II can be measured, the high-z objectshave L(C II)/L(FIR) ratios that are high, more like those of localstarbursts than local ULIRGs. At z>1, much of the star formation inmassive galaxies is occurring at LIRG and ULIRG levels, and U/LIRGsdominate the IR luminosity density. Understanding star forming regionsin high-z IR-luminous galaxies is necessary to understand the conditionsin which most of the stars in massive galaxies formed. The proposedmeasurements of C II and O I in this local sample of high-z analogswill test the hypothesis that redshift evolution in the IR SED shape andthe C II/FIR ratio are due to different physical conditions in high-zIR-luminous galaxies, because of the larger physical extent of the starforming area. |
| Publication | |
| Instrument | PACS_PacsLineSpec_point |
| Temporal Coverage | 2010-12-24T07:29:18Z/2012-02-01T14:32:47Z |
| Version | SPG v14.2.0 |
| Mission Description | Herschel was launched on 14 May 2009! It is the fourth cornerstone mission in the ESA science programme. With a 3.5 m Cassegrain telescope it is the largest space telescope ever launched. It is performing photometry and spectroscopy in approximately the 55-671 µm range, bridging the gap between earlier infrared space missions and groundbased facilities. |
| Creator Contact | https://support.cosmos.esa.int/h®erschel/ |
| Date Published | 2012-08-01T13:58:22Z |
| Last Update | 2026-03-02 |
| Keywords | Herschel Space Observatory data, ESA Herschel mission dataset, far-infrared astronomy observations, submillimeter astronomy data, infrared space telescope observations, PACS photometer data, PACS spectrometer data, SPIRE photometer data, SPIRE Fourier transform spectrometer data, HIFI heterodyne spectroscopy data, far-infrared spectroscopy dataset, submillimeter spectral line observations, cold universe observations dataset, star formation infrared data, molecular cloud far-infrared observations, interstellar medium spectroscopy data, protoplanetary disk infrared observations, galaxy evolution far-infrared data, dust emission submillimeter observations, cosmic infrared background measurements, extragalactic infrared survey data, calibrated level 2 data products, FITS files astronomy, spectral cubes far-infrared, flux-calibrated maps, continuum photometry data, spectral energy distribution measurements, ESA Herschel Science Archive data |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, weiner et al., 2012, 'Physical conditions in disky U/LIRGs from [C II] and [O I] spectra - low-z analogs for high-z starforming galaxies', SPG v14.2.0, European Space Agency, https://doi.org/10.5270/esa-w6hp90u |