2006A&A...454L..33W


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.10CEST06:15:59

2006A&A...454L..33W - Astronomy and Astrophysics, volume 454, L33-36 (2006/8-1)

First observations with CONDOR, a 1.5 THz heterodyne receiver.

WIEDNER M.C., WIECHING G., BIELAU F., RETTENBACHER K., VOLGENAU N.H., EMPRECHTINGER M., GRAF U.U., HONINGH C.E., JACOBS K., VOWINKEL B., MENTEN K.M., NYMAN L.-A., GUESTEN R., PHILIPP S., RABANUS D., STUTZKI J. and WYROWSKI F.

Abstract (from CDS):

The THz atmospheric ``windows'', centered at roughly 1.3 and 1.5THz, contain numerous spectral lines of astronomical importance, including three high-J CO lines, the [N II] line at 205µm, and the ground transition of para-H2D+. The CO lines are tracers of hot (several 100K), dense gas; [N II] is a cooling line of diffuse, ionized gas; the H2D+ line is a non-depleting tracer of cold (∼20K), dense gas. As the THz lines benefit the study of diverse phenomena (from high-mass star-forming regions to the WIM to cold prestellar cores), we have built the CO N+ Deuterium Observations Receiver (CONDOR) to further explore the THz windows by ground-based observations. CONDOR was designed to be used at the Atacama Pathfinder EXperiment (APEX) and Stratospheric Observatory For Infrared Astronomy (SOFIA). CONDOR was installed at the APEX telescope and test observations were made to characterize the instrument. The combination of CONDOR on APEX successfully detected THz radiation from astronomical sources. CONDOR operated with typical Trec=1600K and spectral Allan variance times of ∼30s. CONDOR's ``first light'' observations of CO 13-12 emission from the hot core Orion FIR4 (=OMC1 South) revealed a narrow line with TMB≃210K and ΔV≃5.4km/s. A search for [N II] emission from the ionization front of the Orion Bar resulted in a non-detection. The successful deployment of CONDOR at APEX demonstrates the potential for making observations at THz frequencies from ground-based facilities.

Abstract Copyright:

Journal keyword(s): instrumentation: detectors - methods: observational - submillimeter - stars: formation - HII regions - Orion FIR4

Simbad objects: 10

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Number of rows : 10

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 NAME Ori-S6 PoC 05 35 12.7 -05 24 08           ~ 36 0
2 NAME Orion S reg 05 35 12.9 -05 24 10           ~ 121 0
3 [EC2006] MM12 HII 05 35 13.41015 -05 24 11.1770           ~ 46 1
4 NAME OMC-1 MoC 05 35 14 -05 22.4           ~ 1015 2
5 NAME Orion-KL SFR 05 35 14.16 -05 22 21.5           ~ 2001 1
6 NAME OMC 1S PoC 05 35 14.5 -05 25 49           ~ 70 1
7 M 42 HII 05 35 17.3 -05 23 28           ~ 3724 0
8 NAME Orion Bright Bar reg 05 35 22.30 -05 24 33.0           ~ 716 0
9 NAME Ori A MoC 05 38 -07.1           ~ 2675 0
10 SNR G333.6-00.2 HII 16 22 11 -50 05.6           ~ 140 0

    Equat.    Gal    SGal    Ecl

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2020.07.10-06:15:59

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