A dataset provided by the European Space Agency

Name OT2_pogle01_2
Title Shocked molecular and atomic gas in the Spiderweb radio galaxy at z=2.156


DOI https://doi.org/10.5270/esa-duoqvx3
Author European Space Agency
Description PACS spectroscopy of the Spiderweb radio galaxy (PKS 1138-26) at redshift z=2.156
will be used to study jet-shocked molecular and atomic gas in a rapidly evolving
protocluster central galaxy. This will lead to a better understanding of the impact of AGN
feedback on the evolution of massive elliptical galaxies in general. We have detected
extremely luminous (7E10 Lsun) H2 0-0 S(3) emission in a deep Spitzer IRS
spectroscopic map. This is by far (a factor of 50) the most luminous known molecular
hydrogen emission galaxy. We estimate that there must be >1E7 Msun of warm
(T=650 K) molecular gas heated by dissipation of kinetic energy from the relativistic
radio jet. PACS spectroscopy of the H2 0-0 S(0) line will enable us to measure
the mass of warm H2 at lower temperature (T=100-500) K, which likely constitutes the bulk
of the shocked molecular gas, possibly >1E11 solar masses. We have also detected
ultraluminous PAH emission indicating a star formation rate of 1000 Msun/yr. PACS
spectroscopy of the [Si II] 35 micron and [O I] 63 micron cooling lines will provide
additional diagnostics of the shocked neutral medium, including distinguishing between
magnetic and nonmagnetic shocks, and assessing the kinematics of this important
ISM component in a massive elliptical galaxy under construction.
Instrument PACS_PacsRangeSpec_point
Temporal Coverage 2012-07-19T15:55:07Z/2012-07-20T06:40:16Z
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 2013-01-19T23:19:03Z
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, 2013, Shocked Molecular And Atomic Gas In The Spiderweb Radio Galaxy At Z=2.156, SPG v14.2.0, European Space Agency, https://doi.org/10.5270/esa-duoqvx3