Herschel/HIFI spectroscopy of the intermediate mass protostar NGC 7129 FIRS 2
Journal article, 2010

Herschel/HIFI observations of water from the intermediate mass protostar NGC 7129 FIRS 2 provide a powerful diagnostic of the physical conditions in this star formation environment. Six spectral settings, covering four H_2^16O and two H_2^18O lines, were observed and all but one H_2^18O line were detected. The four H_2^16O lines discussed here share a similar morphology: a narrower, \ap6 km s^-1, component centered slightly redward of the systemic velocity of NGC 7129 FIRS 2 and a much broader, \ap25 km s^-1 component centered blueward and likely associated with powerful outflows. The narrower components are consistent with emission from water arising in the envelope around the intermediate mass protostar, and the abundance of H_2O is constrained to \ap10^-7 for the outer envelope. Additionally, the presence of a narrow self-absorption component for the lowest energy lines is likely due to self-absorption from colder water in the outer envelope. The broader component, where the H_2O/CO relative abundance is found to be \ap0.2, appears to be tracing the same energetic region that produces strong CO emission at high J.

Author

D. Johnstone

National Research Council Canada

University of Victoria

M. Fich

University of Waterloo

C. McCoey

University of Waterloo

Western University

T. A. van Kempen

Leiden University

Harvard-Smithsonian Center for Astrophysics

A. Fuente

Spanish National Observatory (OAN)

L. Kristensen

Leiden University

J. Cernicharo

Centro de Astrobiologia (CAB)

P. Caselli

Arcetri Astrophysical Observatory

University of Leeds

R. Visser

Leiden University

R. Plume

University of Calgary

G. J. Herczeg

Max Planck Institute

E. F. van Dishoeck

Leiden University

Max Planck Institute

S. F. Wampfler

Swiss Federal Institute of Technology in Zürich (ETH)

R. Bachiller

Spanish National Observatory (OAN)

A. Baudry

Swiss Federal Institute of Technology in Zürich (ETH)

M. Benedettini

University of Michigan

University of Rome Tor Vergata

E. A. Bergin

University of Michigan

A. O. Benz

Swiss Federal Institute of Technology in Zürich (ETH)

Per Bjerkeli

Chalmers, Department of Radio and Space Science, Radio Astronomy and Astrophysics

G. A. Blake

California Institute of Technology (Caltech)

S. Bontemps

Laboratoire d'Astrophysique de Bordeaux

J. Braine

Laboratoire d'Astrophysique de Bordeaux

S. Bruderer

Swiss Federal Institute of Technology in Zürich (ETH)

C. Codella

University of Rome Tor Vergata

F. Daniel

Agencia Estatal Consejo Superior de Investigaciones Científicas (CSIC)

LERMA - Laboratoire d'Etudes du Rayonnement et de la Matiere en Astrophysique et Atmospheres

A. M. di Giorgio

University of Rome Tor Vergata

C. Dominik

Anton Pannekoek Institute for Astronomy

S. Doty

Denison University

P. Encrenaz

LERMA - Laboratoire d'Etudes du Rayonnement et de la Matiere en Astrophysique et Atmospheres

T. Giannini

University of Rome Tor Vergata

J. R. Goicoechea

Arcetri Astrophysical Observatory

T. de Graauw

Atacama Large Millimeter-submillimeter Array (ALMA)

F. Helmich

Netherlands Institute for Space Research (SRON)

F. Herpin

Laboratoire d'Astrophysique de Bordeaux

M. R. Hogerheijde

Leiden University

T. Jacq

Laboratoire d'Astrophysique de Bordeaux

J. K. Jorgensen

University of Copenhagen

B. Larsson

Stockholm University

D. Lis

California Institute of Technology (Caltech)

René Liseau

Chalmers, Department of Radio and Space Science, Radio Astronomy and Astrophysics

M. Marseille

Netherlands Institute for Space Research (SRON)

G. J. Melnick

Harvard-Smithsonian Center for Astrophysics

D. A. Neufeld

Johns Hopkins University

B. Nisini

University of Rome Tor Vergata

Michael Olberg

Chalmers, Department of Radio and Space Science, National Facility for Radio Astronomy

B. Parise

Max Planck Institute

University of Cologne

J. C. Pearson

Jet Propulsion Laboratory, California Institute of Technology

C. Risacher

Netherlands Institute for Space Research (SRON)

J. Santiago-García

Spanish National Observatory (OAN)

P. Saraceno

University of Rome Tor Vergata

R. Shipman

Netherlands Institute for Space Research (SRON)

M. Tafalla

Spanish National Observatory (OAN)

F. F. S. van der Tak

University of Groningen

Netherlands Institute for Space Research (SRON)

F. Wyrowski

Max Planck Institute

U. A. Yildiz

Leiden University

E. Caux

University of Groningen

N. Honingh

University of Cologne

W. Jellema

Netherlands Institute for Space Research (SRON)

R. Schieder

University of Cologne

D. Teyssier

European Space Astronomy Centre (ESAC)

N. Whyborn

Atacama Large Millimeter-submillimeter Array (ALMA)

Astronomy and Astrophysics

0004-6361 (ISSN) 1432-0746 (eISSN)

Vol. 521 1 L41+- L41

Subject Categories

Astronomy, Astrophysics and Cosmology

Roots

Basic sciences

DOI

10.1051/0004-6361/201015122

More information

Latest update

5/23/2019