Herschel-SPIRE spectroscopy of G29.96-0.02: fitting the full SED

Abstract

We use the SPIRE Fourier-Transform Spectrometer (FTS) on-board the ESA Herschel Space Telescope to analyse the submillimetre spectrum of the Ultra-compact HII region G29.96-0.02. Spectral lines from species including 13CO, CO, [CI], and [NII] are detected. A sparse map of the [NII] emission shows at least one other HII region neighbouring the clump containing the UCHII. The FTS spectra are combined with ISO SWS and LWS spectra and fluxes from the literature to present a detailed spectrum of the source spanning three orders of magnitude in wavelength. The quality of the spectrum longwards of 100 μm allows us to fit a single temperature greybody with temperature 80.3\pm0.6K and dust emissivity index 1.73\pm0.02, an accuracy rarely obtained with previous instruments. We estimate a mass of 1500 Msol for the clump containing the HII region. The clump's bolometeric luminosity of 4 x 10^6 Lsol is comparable to, or slightly greater than, the known O-star powering the UCHII region.

5 pages including affiliations, 4 figures, accepted by A&A

References in corpus (8)

• Herschel Space Observatory - An ESA facility for far-infrared and submillimetre astronomy
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• First detection of the Methylidyne cation (CH+) fundamental rotational line with the Herschel/SPIRE FTS

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• A Hi-GAL study of the high-mass star-forming region G29.96-0.02
• FOREST Unbiased Galactic plane Imaging survey with the Nobeyama 45 m telescope (FUGIN). VI. Dense gas and mini-starbursts in the W43 giant molecular cloud complex
• A Herschel/HIFI Legacy Survey of HF and H2O in the Galaxy: Probing Diffuse Molecular Cloud Chemistry
• HyGAL: Characterizing the Galactic ISM with observations of hydrides and other small molecules -- I. Survey description and a first look toward W3(OH), W3 IRS5 and NGC 7538 IRS1
• The initial conditions of high-mass star formation: radiative transfer models of IRDCs seen in the Herschel Hi-GAL survey
• Extinction and PAH intensity variations across the HII region IRAS 12063-6259
• The distribution of warm gas in the G327.3--0.6 massive star-forming region
• Three-dimensional distribution of hydrogen fluoride gas toward NGC6334 I and I(N)
• $Herschel$ SPIRE-FTS observations of RCW 120