A dataset provided by the European Space Agency

Name GT1_golofs01_4
Title SPIRE spectroscopy of protoplanetary disks
URL

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DOI https://doi.org/10.5270/esa-idmsyif
Author olofsson, g.
Description We propose spectroscopy of Herbig Ae/Be and T Tauri stars using the
SPIRE FTS. This instrument covers a broad spectral range, 200 - 650 m,
which is basically unexplored with the exception of two atmospheric
windows at 350 and 450 m. The FTS is well suited for both the definition
of broad features as well as the detection of emission lines. Our source
list is co-ordinated with the OT Key program DIGIT (PI: N. Evans) together
providing spectra in the range 50-650 microns. It includes 10 Herbig
Ae/Be stars and three T Tauri stars. The ages of the stars range from
1 Myr to 10 Myr, the mass range is 1-5 Msun and the temperature range
is 4300-10000 K. The flux density of the continuum varies from a few
Janskys to tenths of Janskys between the sources and in general the
brightness for a given source decreases rapidly from the short wave-
length to the long wavelength end. As our main purpose is detecting
emission lines and as these are known (from other spectral regions) to
correlate poorly with the dust emission (but rather with other properties
as disk flaring and accretion rate) we propose a standard observation
time of one hour per source, except for the fainter T Tauri stars which
are observed a bit longer. We expect to detect lines from CO,13CO, H2O,
CI and possibly SiO, HDO and NH3. The relative brightness distribution
for the carbon monoxide lines and in particular the 13CO/12CO ratios
for the J=4-3 to J=13-12 transitions, covered by the FTS, will provide
powerful constraints on the density and temperature structure of the
disk. Water vapour lines will provide further constraints on the density
and radiation field in the regions inside the snow line
Publication Signatures of warm carbon monoxide in protoplanetary discs observed with Herschel SPIRE . van der Wiel M. H. D. et al. . Monthly Notices of the Royal Astronomical Society, Volume 444, Issue 4, p.3911-3925 . 444 . 10.1093\/mnras\/stu1462 . 2014MNRAS.444.3911V ,
Instrument SPIRE_SpireSpectrometer_
Temporal Coverage 2010-08-08T12:41:55Z/2011-07-25T17:57:48Z
Version SPG v14.1.0
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 2012-01-25T00:00:00Z
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, olofsson, g., 2012, GT1_golofs01_4, SPG v14.1.0, European Space Agency, https://doi.org/10.5270/esa-idmsyif