| Name | OT2_ulisen01_2 |
| Title | Herschel observations of nearby mergers: understanding the process of star-formation along cosmic time |
| URL | http://archives.esac.esa.int/hsa/whsa-tap-server/data?retrieval_type=OBSERVATION&observation_id=1342265633&instrument_name=SPIRE&product_level=LEVEL0&compress=true |
| DOI | https://doi.org/10.5270/esa-5xymlb8 |
| Author | lisenfeld, u. |
| Description | We propose to observe a small sample of nearby major mergers in threedifferent merging stages with Herschel PACS and SPIRE photometers.The observations will allow us to derive the dust surface density andfrom this the total gas surface density. Together with alreadyavailable tracers of the SFR (Spitzer 24 micron and GALEX FUV) we can study the Kennicutt-Schmidt law.High resolution data of the atomic gas content (partlyalready available and partly applied for at the EVLA) allow usfurthermore to make a distinction between atomic and molecular gas.The derivation of the total gas mass via the dust emissioninvolves less serious uncertainties than the use of CO as a tracerof the molecular gas.With these observation we aim to address the open question whymerging galaxies form stars at about a 10 times higher rate comparedto their gas mass than quiescent galaxies.Our recent numerical models explain this by a higher turbulence whichmake the step from low-density to high-density (star--forming) gas moreefficient. It makes specific prediction about the efficiency of theconversion from atomic to molecular gas, which directly affectsthe ratio between SFR and gas mass, as a function of merger stage.The selection of our sample and the proposed observationswill allow us to test the predictionsof the simulations and provide therefore an opportunity toimprove our understanding of the physical processesunderlying star-formation and of the cosmic star formation history |
| Publication |
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| Instrument | PACS_PacsPhoto_largeScan, SPIRE_SpirePhoto_large |
| Temporal Coverage | 2013-02-21T17:57:41Z/2013-03-25T00:03:50Z |
| 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 | 2013-09-24T23:47:35Z |
| 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, lisenfeld et al., 2013, 'Herschel observations of nearby mergers: understanding the process of star-formation along cosmic time', SPG v14.2.0, European Space Agency, https://doi.org/10.5270/esa-5xymlb8 |