README web version of /home/usg/OPS/MTS/readme_xml/readme_83018100

Principal Investigator Email Address

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chini@atro.rub.de
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Estimated Total Execution Time (hours, including overheads)

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1:00:00
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General Description

We have discovered high-mass protostellar candidates in M17 whose SEDs
 yield luminosities between 100 and several 1000 L_sol. Their colors and J,K-band
 spectroscopy suggest temperatures of 3000 to 7000 K. All sources show the 2.3 mu
 CO band head feature in absorption, indicating ongoing accretion. These properties
 are in accord with theoretical models of extremely young (~ 10^4 yr), heavily accreting
 (10^-5 - 10^-3 M_sol/yr) protostars currently developing into high-mass stars.

We wish to confirm our estimates of the effective temperature and corroborate the
 ongoing accretion activity of these protostars by optical spectroscopy centered
 on the Halpha line.

The results from the spectra will reveal the nature of the sources by placing them
 unambiguously onto recent evolutionary tracks. If true, these objects will be in
 a rare evolutionary stage supporting the high mass-accretion rate and represent
 the rare missing link between luminous high-mass cores and ultra-compact HII regions.

Waiver Requests

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No Waiver Request was submitted
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Critical Observing Condition Constraints

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none
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Time-Critical Aspects

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none
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Special Execution Requirements

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Special Calibration Information

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ToO Information

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ToO Activators List

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Is this a Pre-imaging run ?

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false
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Pre-imaging Requirements

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Source(s) of Pre-imaging

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Pre-imaging sources not listed above

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NTT EMMI
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Do all your OBs comply with the instrument-specific requirements listed on the instrument-specific Phase 2 web page ?

If this is a pre-imaging run, did you select PRE-IMAGING for the Observing Category for each Observing Template ?

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N/A
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Do all your finding charts comply with both the general and instrument-specific Phase 2 Web Pages ?

If you submitted OBs for standard stars, did you specify the magnitude and spectral type of all standard stars in the OBs ?

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N/A
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Have you included OBs for any calibrations that you need but which are not part of the Calibration Plan ?

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N/A
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If you are observing Moving Targets, have you attached suitable ephemeris files to your OBs?

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N/A
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If you have preferences which OBs should be executed first, did you make use of the User Priority field in the OBs ?

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N/A
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If this is a run that requires coordinated observations with other facilities, did you give proper instructions in the Time-Critical Aspects Section ?

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N/A
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If you have prepared your finding charts with tools other than FIMS, do they comply with the specifications on the FORS1 Phase 2 web page ?

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N/A
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Last creation of page: Tue Oct 6 15:40:29 2009
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