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Contributions if Interferometry for Orion. M. Robberto (ESA/STScI). The Great Orion Nebula. The Orion Cluster. The Orion Cluster. 2mass near-IR image. Why Orion is important?. Is the nearest GMC and the most recent episode of massive star formation
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Contributions if Interferometry for Orion M. Robberto (ESA/STScI)
The Orion Cluster The Orion Cluster 2mass near-IR image
Why Orion is important? • Is the nearest GMC and the most recent episode of massive star formation • Distance is fairly well known (~450pc) • Background contamination is low • Is the paradigm for typical star formation • Is the paradigm for typical planet formation?
The HST mosaic HST; Ha+[OIII]+[SII] (courtesy Bob O’Dell)
3.5 micron image Lada et al., 2000
BN-KL Ney-Allen OMC1-S 10 micron image
Understanding the IR emission of photoevaporated disks • Disks in HII regions are under the influence of a complex radiation field • HST data constrain the model parameters (tilt angle with respect to the ionizing star and to the Earth, distance from the ionizing star, disk size…) Robberto, Beckwith and Panagia, Ap.J, 2002 (in press)
MID-IR imaging > photometry > SEDs vs. disk models Ha,[OIII],[SII] 2.2mm 3.5mm 10mm Robberto, Beckwith and Herbst, 2000
IRC2 Dougados et al. 1993 ApJ 406,111 MAX N-band
Ney-Allen nebula MAX 10mm HST/WFPC2 F547M MAX 10/20mm
q1Ori-C and SC3 F336W – PC 1s
q1Ori-C and SC3 F336W – PC 30s
q1Ori-C and SC3 F439W – PC 1s
q1Ori-C and SC3 F439W – PC 30s
q1Ori-B is extended/binary F457M – PC 30s