CROMOS: A cryogenic near-infrared, multi-object spectrometer for the VLT

Details CROMOS: A cryogenic near-infrared, multi-object spectrometer for the VLT CROMOS: A cryogenic near-infrared, multi-object spectrometer for the VLT

2001-08-20

arxiv.org/abs/astro-ph/0108318v1

Astronomy and Astrophysics

Astrophysics

11 pages LaTeX, 7 postscript figures. To be published in the Proceedings of the ESO Workshop Scientific Drivers for ESO Future

Scientific paper

10.1007/10857019_18

We discuss a cryogenic, multi-object near-infrared spectrometer as a second generation instrument for the VLT. The spectrometer combines 20 to 40 independent integral eld units (IFUs), which can be positioned by a cryogenic robot over the entire unvignetted eld of the VLT (~7'). Each IFU consists of a contiguous cluster of 20 to 30 pixels (0.15 to 0.25" per pixel). The individual IFUs have cold fore-optics and couple into the spectrograph with integrated bers-microlenses. The spectrometer has lambda/d-lambda~4000 and simultaneously covers the J-, H-, and K-bands with three HAWAII 2 detectors. The system is designed for operation both in seeing limited and MCAO modes. Its speed is approximately 3500 times greater than that of ISAAC and 60 times greater than NIRMOS (in H-band). The proposed instrument aims at a wide range of science, ranging from studies of galaxies/clusters in the high-z Universe (dynamics and star formation in z>1 galaxies, evolution of ellipticals, properties of distant, obscured far-IR and X-ray sources), to investigations of nearby starbursts, star clusters and properties of young low mass stars and brown dwarfs.

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