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Centro de Astrofísica da Universidade do Porto

UWISH2 - The UKIRT Widefield Infrared Survey for H2

D. Froebrich, C. J. Davis, G. Ioannidis, T. M. Gledhill, M. Takami, A. Chrysostomou, J. E. Drew, J. Eislöffel, A. Gosling, R. Gredel, J. Hatchell, K. W. Hodapp, M. S. N. Kumar, P. W. Lucas, H. Matthews, M. G. Rawlings, M. D. Smith, B. Stecklum, W. P. Varricatt, H. T. Lee, P. S. Teixeira, C. Aspin, T. Khanzadyan, J. Karr, H.-J. Kim, B.-C. Koo, J. J. Lee, Y.-H. Lee, T. Yu. Magakian, T. A. Movsessian, E. H. Nikogossian, T. S. Pyo, T. Stanke

We present the goals and preliminary results of an unbiased, near-infrared, narrow-band imaging survey of the First Galactic Quadrant (10° < l <65° ; -1.3° < b <+1.3°). This area includes most of the Giant Molecular Clouds and massive star forming regions in the northern hemisphere. The survey is centred on the 1-0 S(1) ro-vibrational line of H2, a proven tracer of hot, dense molecular gas in star-forming regions, around evolved stars, and in supernova remnants. The observations complement existing and upcoming photometric surveys (Spitzer-GLIMPSE, UKIDSS-GPS, JCMT-JPS, AKARI, Herschel Hi-GAL, etc.), though we probe a dynamically active component of star formation not covered by these broad-band surveys. Our narrow-band survey is currently more than 60% complete. The median seeing in our images is 0.73”. The images have a 5 σ detection limit of point sources of K∼18 mag and the surface brightness limit is 10-19Wm-2 arcsec-2 when averaged over our typical seeing. Jets and outflows from both low and high mass Young Stellar Objects are revealed, as are new Planetary Nebulae and - via a comparison with earlier K-band observations acquired as part of the UKIDSS GPS - numerous variable stars. With their superior spatial resolution, the UWISH2 data also have the potential to reveal the true nature of many of the Extended Green Objects found in the GLIMPSE survey.

stars: formation - ISM: individual objects: Galactic Plane - ISM: jets and outflows - ISM: kinematics and dynamics - infrared: stars

Monthly Notices of the Royal Astronomical Society
Volume 413, Page 480
May 2011

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Institute of Astrophysics and Space Sciences

Institute of Astrophysics and Space Sciences (IA) is a new but long anticipated research infrastructure with a national dimension. It embodies a bold but feasible vision for the development of Astronomy, Astrophysics and Space Sciences in Portugal, taking full advantage and fully realizing the potential created by the national membership of the European Space Agency (ESA) and the European Southern Observatory (ESO). IA resulted from the merging the two most prominent research units in the field in Portugal: the Centre for Astrophysics of the University of Porto (CAUP) and the Center for Astronomy and Astrophysics of the University of Lisbon (CAAUL). It currently hosts more than two-thirds of all active researchers working in Space Sciences in Portugal, and is responsible for an even greater fraction of the national productivity in international ISI journals in the area of Space Sciences. This is the scientific area with the highest relative impact factor (1.65 times above the international average) and the field with the highest average number of citations per article for Portugal.

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