The giant Ly α  nebula associated with a  z  = 2.5 radio galaxy | Zendy

VillarMartín M. | Zendy; Sánchez S. F. | Zendy; Peletier R. | Zendy; Vernet J. | Zendy; de Breuck C. | Zendy; Humphrey A. | Zendy; di Serego Alighieri S. | Zendy; Fosbury R. | Zendy; Stern D. | Zendy

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The giant Ly α nebula associated with a z = 2.5 radio galaxy

Author(s) -

VillarMartín M.,

Sánchez S. F.,

Peletier R.,

Vernet J.,

de Breuck C.,

Humphrey A.,

di Serego Alighieri S.,

Fosbury R.,

Stern D.

Publication year - 2006

Publication title -

astronomische nachrichten

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.394

H-Index - 63

eISSN - 1521-3994

pISSN - 0004-6337

DOI - 10.1002/asna.200510504

Subject(s) - physics , astrophysics , galaxy , nebula , radio galaxy , astronomy , kinematics , stars , classical mechanics

We present a kinematic and morphological study of the giant Ly α nebula associated with the radio galaxy MRC 2104–242 ( z = 2.49) based on integral field spectroscopic VIMOS data from VLT. The galaxy appears to be embedded in a giant (≃120 kpc) gas reservoir that surrounds it completely. The kinematic properties of the nebula suggest that it is a rotating structure, which would imply a lower limit to the dynamical mass of ∼3 × 1011 M ⊙ . An alternate scenario is that the gas is infalling. Such a process would be able to initiate and sustain significant central starburst activity, although it is likely to contribute with less than 10% of the total stellar mass of the galaxy. (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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