SIMBAD references

2012A&A...540A..81O - Astronomy and Astrophysics, volume 540A, 81-81 (2012/4-1)

Jet-driving protostars identified from infrared observations of the Carina Nebula complex.


Abstract (from CDS):

Jets are excellent signposts for very young embedded protostars, so we want to identify jet-driving protostars as a tracer of the currently forming generation of stars in the Carina Nebula, which is one of the most massive galactic star-forming regions and which is characterised by particularly high levels of massive-star feedback on the surrounding clouds. We used archive data to construct large (>2°x2°) Spitzer IRAC mosaics of the Carina Nebula and performed a spatially complete search for objects with excesses in the 4.5µm band, typical of shock-excited molecular hydrogen emission. We also identified the mid-infrared point sources that are the likely drivers of previously discovered Herbig-Haro jets and molecular hydrogen emission line objects. We combined the Spitzer photometry with our recent Herschel far-infrared data to construct the spectral energy distributions, and used the Robitaille radiative-transfer modelling tool to infer the properties of the objects. The radiative-transfer modelling suggests that the jet sources are protostars with masses between ∼1M and ∼10M that are surrounded by circumstellar disks and embedded in circumstellar envelopes. The estimated protostar masses ≤10M suggest that the current star-formation activity in the Carina Nebula is restricted to low- and intermediate-mass stars. More optical than infrared jets can be observed, indicating that star formation predominantly takes place close to the surfaces of clouds.

Abstract Copyright:

Journal keyword(s): ISM: clouds - stars: formation - ISM: jets and outflows - stars: protostars - Herbig-Haro objects

Nomenclature: Table 1: [OPG2012] JHHMMSS.s+DDMMSS N=37.

Simbad objects: 64

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