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Jennifer Hatchell

I am an STFC Advanced Research Fellow and star formation observer in the Astrophysics Group of the School of Physics and I am active in several surveys of nearby star-forming regions.

My particular research interest is in using far-infrared and millimetre wavelengths to study clouds of gas and dust as they collapse under gravity to form stars.

JCMT Gould Belt survey

The JCMT Gould Belt survey focusses on the nearest star formation regions to the Earth, which lie in the Gould Belt, a ring of stars and gas 3,000 light years in diameter roughly centred on the Sun.

We plan to use the new submillimeter bolometer camera SCUBA-2, which has a mapping speed up to 1000 times that of its predecessor SCUBA, to image the dust emission from all the nearby star forming molecular clouds. This will increase the number of known protostars from tens to thousands, and increase our coverage of star forming clouds from a few square degrees to hundreds. With supporting velocity information from the molecular line array receiver HARP-B and magnetic field configurations from POL2, this survey will address some of the fundamental questions about star formation: how long does it take stars form, how are their masses determined, and what is the role of magnetic fields in the star formation process?

The molecular line component of the survey with HARP-B is now underway, producing maps of carbon monoxide clouds in the Orion, Serpens, Perseus and Ophiuchus star-forming complexes.

A sister survey using LABOCA on APEX targets the southern clouds in Lupus and Chamaeleon.

Spitzer Gould's Belt survey

Spitzer space telescope The Spitzer Gould's Belt survey images the same nearby star-forming regions but at a different wavelengths. This completes the mid-IR survey begun by the Spitzer Cores to Disks and Guaranteed Time programmes. With both mid-IR and submm data, one can separate protostars at different evolutionary stages and estimate the masses of their envelopes and disks.

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