A dataset provided by the European Space Agency

Name DDT_nnesvadb_4
Title C+ and H2 spectroscopy of a single star-forming region at z=2.599 recently discovered with Planck/SUCBA2/SPIRE


DOI https://doi.org/10.5270/esa-j1dq5gg
Author European Space Agency
Description We request DD time to observe a highly magnified starburst at z=2.599
recently discovered with Planck, which has CO line widths like those
of giant molecular clouds in the Milky Way! The velocity gradient and
narrowness of the CO lines indicates that we are observing small (a
few 10s pc) star forming regions in a distant galaxy due to its extreme
magnification and fortuitous alignment with the lensing mass. This is
a UNIQUE opportunity to probe a starburst at z=2.5 AT THE SCALE OF
SINGLE STAR-FORMING REGIONS. We will measure [CII]158, the main coolant
of UV-heated gas and thus, a prime tracer of star formation, and the H2
0-0 S(1) line, the main coolant of shocked gas, a tracer of turbulence
dissipation and the warm molecular mass. Only Herschel can observe these
important lines. ALMA cannot, and SOFIA cannot.

During the formation process of galaxies, strong turbulence is generated
with potentially dramatic consequences for the nature of star formation in
distant galaxies. For example, if the gas remains turbulent on scales <100
pc, then the global galaxy kinematics (i.e., Toomre stability) no longer
stabilizes the gas. What are the consequences for the star formation in
such an environment and how does this high level of turbulence during
galaxy formation change the nature of galaxies? Through a unique
synergy of the Planck all-sky survey, Herschel, and IRAM sub-arcsec
DDT interferometry, we have just caught a unique source at z=2.599,
G80.3+49.8, with bright FIR continuum akin to dusty high-z starbursts,
and surprisingly narrow CO line widths like GMCs in the Milky Way!

G80.3+49.8 is truly unique and will become a benchmark for studying
the physics regulating intense star formation at high-z. Herschel
last-minute observations are our only way to quantify the global
budgets of UV and shock heating estimated from the... main IR cooling lines,
both of which are unobservable from the ground, and both critical in
linking the details of star formation with the generalities of galaxy
Instrument HIFI_HifiPoint_dbs, PACS_PacsLineSpec_point
Temporal Coverage 2013-03-05T07:23:30Z/2013-03-06T02:46:15Z
Version SPG v14.2.0
Mission Description Herschel was launched on 14 May 2009! It is the fourth 'cornerstone' mission in the ESA science programme. With a 3.5 m Cassegrain telescope it is the largest space telescope ever launched. It is performing photometry and spectroscopy in approximately the 55-671 µm range, bridging the gap between earlier infrared space missions and groundbased facilities.
Creator Contact https://support.cosmos.esa.int/h®erschel/
Date Published 2013-09-06T01:49:22Z
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, 2013, C+ And H2 Spectroscopy Of A Single Star-Forming Region At Z=2.599 Recently Discovered With Planck/Sucba2/Spire, SPG v14.2.0, European Space Agency, https://doi.org/10.5270/esa-j1dq5gg