Z-Spec: A Dispersive Millimeter-Wave Spectrometer Jason Glenn From Z-Machines to ALMA! Caltech CEAColorado JPL ISAS Bret Naylor Lionel DubandJames Aguirre.

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Presentation transcript:

Z-Spec: A Dispersive Millimeter-Wave Spectrometer Jason Glenn From Z-Machines to ALMA! Caltech CEAColorado JPL ISAS Bret Naylor Lionel DubandJames Aguirre Jamie Bock Hideo Matsuhara Jonas Zmuidzinas Lieko Earle Matt Bradford Jason Glenn Mark Dragovan Cardiff Phil Maloney Hien Nguyen Peter Ade Corey Wood

Bolocam 1.1 mm Galaxy Surveys (Laurent et al., 2005; Maloney et al., 2005; Laurent et al., 2006) The Lockman HoleCOSMOS (Aguirre et al., 2006)

350  m Follow Up & Photometric Redshifts (Laurent et al., 2006) All redshifted to z=2 5 Galaxies Based on 5 galaxies with published spectroscopic redshifts: Photometric redshifts based on radio/FIR correlation appear to be too large by  z  1 (1.4 GHz too low) One spectroscopic misidentification out of five?

Ultimate Science Goal: High-z CO Lines Model Spectrum with CO Rotational Ladder Z-Spec bandpass in the galaxy rest frame as a function of redshift

Overall Instrument Description Observations from the CSO = 1.0 to 1.5 mm Waveguide-coupled diffraction grating Resolution element: ~ 900 MHz  Velocity resolution: ~ 1000 km s Si 3 N 4 micromesh NTD Ge bolometers (BLIP NEP W Hz -1/2  design NEP = 4× ) Technology demonstration for future orbital missions: SPICA (BLISS), SAFIR, & CCAT WaFIRS Grating: 62 × 48 × 3.3 cm 60 mK ADR (Salt pill courtesy Peter Timbie’s group) Feedhorn input 3 He/ 4 He Fridge

Waveguide-Coupled Grating & Bolometers Single broadband corrugated input feed Waveguide “bend blocks” couple radiation from the parallel plate waveguide to the bolometers Bolometers are mounted on keys with reflecting backshorts The parallel plate grating diffracts and focuses incoming radiation

Assembled

Z-Spec at the CSO June 2005 ArrivalBeam maps!

First Light!

ULIRG Line Survey Aiming to reach BLIP limit soon ULIRG survey to begin in spring 2006 with submillimeter galaxies to follow IRAM 30 m?