4-8 October 2015
Hans Harnack Haus
Europe/Berlin timezone
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Contribution Contributed Talk

Hans Harnack Haus -

First results from an unbiased ALMA spectral survey of IRAS16293


  • Dr. Matthijs VAN DER WIEL

Primary authors



The origin and history of prebiotic chemistry in protostars and protoplanetary disks is a main research theme within astrochemistry. With current observational facilities it is becoming possible to routinely detect complex organic molecular species, and also to study their spatial distribution and relative abundances throughout protostellar envelopes and embedded protoplanetary disks. We will show early result highlights from a large ALMA program targeting the binary protostellar system IRAS16293: Protostellar Interferometric Line Survey (PILS). This data is more than an order of magnitude more sensitive than previous spectral surveys toward this source. In addition, the adopted interferometer configuration allows us to probe spatial scales ranging from $>$1000 au down to $\sim$35 au. This does not only separate the two binary components very well, it also allows us to resolve protoplanetary disk scales around each of the two components. The combination of high angular resolution, unprecedented sensitivity, and unbiased frequency coverage of an entire atmospheric window provides openings for various investigations. For example, we study the presence and spatial distribution of complex organic molecules around the two sources, chemical fractionation effects of various isotopologues, and dynamical structure of the gas around each source and in between the two components.