The Role of Dust in the Formation of Stars: Proceedings of the ESO Workshop Held at Garching, Germany, 11–14 September 1995

470 Pages·1996·64.443 MB·English

by  N. Ageorges, A. Eckart (auth.), Hans Ulrich Käufl, Ralf Siebenmorgen (eds.)

ESO ASTROPHYSICS SYMPOSIA
European Southern Observatory
Series Editor: Philippe Crane
Springer-Verlag Berlin Heidelberg GmbH
Hans Ulrich Kaufl
Ralf Siebenmorgen (Eds.)
The Role of Dust
in the Formation
of Stars
Proceedings of the ESO Workshop
Held at Garching, Germany,
11-14 September 1995
Springer
Volume Editors
Hans Ulrich Kaufl
European Southern Observatory
Karl-Schwarzschild-Strasse 2
D-85748 Garching, Germany
Ralf Siebenmorgen
ESA
Villafranca del Castillo
Satellite Tracking Station
P.O. Box 50727
E-28080 Madrid, Spain
Series Editor
Philippe Crane
European Southern Observatory
Karl-Schwarzschild-Strasse 2
D-85748 Garching, Germany
Cataloging-in-Publication Data applied for
Die Deutsche Bibliothek - CIP-Einheitsaufnahme
The role of dust in the formation of stars: Proceedings of the ESO workshop, held at
Garching, Germany, 11-14 September 19951 Hans Ulrich Kiiufl ; Ralf Siebenmorgen (ed.).
Berlin; Heidelberg; New York; Barcelona; Budapest; Hong Kong; London; Milan;
Paris; Santa Clara; Singapore; Tokyo: Springer, 1996
(ESO astrophysics symposia)
NE: Kiiufl, Hans Ulrich [Hrsg.]; European Southern Observatory
ISBN 978-3-662-22515-8 ISBN 978-3-540-68594-4 (eBook)
DOl 10.1007/978-3-540-68594-4
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Originally published by Springer-Verlag Berlin Heidelberg New York in 1996.
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Preface
This ESO workshop, which took place in September 1995 on a topic that
at a first glance could be considered rather specialized, attracted an unpre
dictably large number of scientists. This certainly reflects the importance of
this field, which has lost its seemingly esoteric character, in a wider astro
physical context.
To give as much room as possible in these proceedings to the targeted
talks, no presentation of the Very Large Telescope Observatory has been
included. All readers missing such a presentation are reminded that up-to
date in-depth information about the VLT status is available electronically.1
Papers were given concerning observations in the entire electromagnetic
spectrum from x-rays to mm-waves, i.e., exceeding 22 octaves in frequency.
The VLT as any ground-based optical observatory can only address at best
7 octaves. Nevertheless the VLT, most likely the only ground-based observa
tory specifically designed to access all these 7 octaves of the electromagnetic
spectrum practically in parallel, will undoubtedly be a tool of extreme value
to this field.
This workshop took place only days before ISO, Europe's Infrared Space
Observatory, was successfully launched. In its lifetime, which apparently will
substantially exceed all expectations, ISO will undoubtedly make important
observations (and discoveries!) in this field. Combining data from ISO and
the VLT, two extremely complementary observatories, will greatly enhance
the understanding of star formation. It is of particular advantage that the
VLT is located in the southern hemisphere, because this is the part in the sky
where most galactic star forming regions are located. Moreover the VLT will
allow for in-depth studies of star formation in the Magellanic Clouds. The
influence of metallicity (i.e., dust abundance and composition) on star for
mation can hence be tested. This workshop demonstrated that the improved
observational capabilities are well complemented by progress in the fields of
numerical simulation and laboratory experiments. Talks were given on how
magnetic fields reign the protostellar collaps and on grain-grain interaction,
and there was also a demonstration of a model-model collision.
At this point the editors wish to thank the scientific organizing commit
tee and all participants and authors. Our thanks go also to all ESO staff
contributing to this conference in general, but especially to the conference
secretary Christina Stoffer.
Garching/Vilspa, June 1996 Hans Ulrich Kaufl
Ralf Siebenmorgen
1 http://http.hq.eso.org/vlt/
Contents
Part I Ground-Based Observations
of Young Stellar Objects
High-Angular Resolution Near-Infrared Observations
of the Circumstellar Environment of Young Stellar Objects
N. Ageorges and A. Eckart ............................................. 3
Submillimeter Dust Continuum Emission as a Probe
of Protostellar Evolution
P. Andre and S. Bontemps ............................................. 7
Compact Molecular Outflows from Young Stellar Objects
in L1641
J .C. Correia, M. Griffin, P. Saraceno, and A. Zavagno .................. 11
Anatomy of a Spatially Resolved Dust Disc
Around a B-Type YSO
W.R.F. Dent, C. Racela, and F. Rosengarten .......................... 15
Mid-IR PAH Emission in YSOs WL 16 & WL 22
J.P. Emerson .......................................................... 19
Mid-IR Imaging of YSOs:
the Hydrocarbon Emission Features in WL 16
J.P. Emerson, T.J.T. Moore, C.J. Skinner, and M.M. Meixner ......... 23
Star Formation in the Vela Molecular Clouds: Near IR Images
T. Giannini, D. Lorenzetti, B. Nisini, L. Spinoglio, A. Zavagno,
R. Liseau, P. Andreani, and A. Moneti ................................ 27
Linear and Circular Imaging Polarimetry
of the Chamaeleon Infrared Nebula
T.M. Gledhill, A. Chrysostomou, and J .H. Hough ...................... 31
Near-IR Speckle Imaging of Luminous Young Stellar Objects
M.G. Hoare, A. Glindemann, and A. Richichi .......................... 35
VIII
A Large Dust Shell Observed at 10j.lm Around V921 Sco
P.-O. Lagage, S. Cabrit, T. Montmerle, and G. Olofsson ............... 39
Dust Emission from Bok Globules
R. Launhardt and T. Henning ......................................... 43
Density Structure of Protostellar Envelopes
F. Motte, P. Andre, and R. Neri ....................................... 47
What Causes the Variability of the PV Cep Nebula?
T. Neckel and H.J. Staude ............................................. 51
1.3 mm Dust Continuum Observations
of Young X-Ray Selected Stars in Ophiuchus
D. Nurnberger, W. Brandner, H.W. Yorke, and H. Zinnecker ........... 55
The Luminosity-mm Flux Correlation of Class I Sources
Exciting Outflows
P. Saraceno, F. D'Antona, F. Palla, M. Griffin, and E. Tommasi 59
PAHs as Probes of Photo-Dissociation Regions
in M17 and the Orion Bar
G.C. Sloan, J. Bregman, A.S.B. Schultz, P. Temi, and D.M. Rank ...... 63
Mid-Infrared Imaging Polarimetry of BNKL
C.H. Smith, D.K. Aitken, T.J .T. Moore, T. Fujiyoshi,
P.F. Roche, and C.M. Wright .......................................... 67
Star Formation in the Northern Region of NGC 6334
M. Tapia and P. Persi ................................................. 71
Morphology of the Star Forming Region
Associated with HH25-26
E. Tommasi, D. Lorenzetti, and B. Nisini .............................. 75
New Millimetre Observations of Pre-stellar Cores
D. Ward-Thompson, P. Andre, and F. Motte .......................... 79
Young Stellar Objects in L1641:
a Submillimeter Continuum Study
A. Zavagno, S. Molinari, E. Tommasi, P. Saraceno, and M. Griffin ..... 83
IX
Part II Observations of Dust Factories
3-D Structure of the Bipolar Dust Shell
of TJ Carinae
D.G. Currie, D.M. Dowling, E.J. Shaya, J.J. Hester,
The HST WF fPC Instrument Definition Team, and
The HST WFPC2 Instrument Definition Team ........................ 89
Dust Around Post-AGB Sources with 21 J.lm Feature
R. Szczerba, K. Volk, and S. Kwok .................................... 95
Part III Observational Results Based on IRAS,
COBE or Balloon Borne Platforms
HIRES IRAS Images of the Serpens Core
M. Barsony and R.L. Hurt ........................................... 101
A Catalogue of Massive Young Stellar Objects: A Description
S.J. Chan and T. Henning ............................................ 105
The S135 Star Formation Region
C. Kampe and G. Joncas ............................................. 109
Star Formation in the Cepheus Flare Molecular Clouds
M. Kun .............................................................. 113
An Overview of the COBE Infrared Datasets
D. Leisawitz ......................................................... 117
Submillimeter Continuum Emission in the Orion A Cloud
Observed with PRONAOS
I. Ristorcelli, A. De Luca, M. Giard, F. Pajot, J.P. Torre,
G. Serra, and J.M. Lamarre .......................................... 121
Catalogue of IRAS Loops in the lInd Galactic Quadrant
L.V. T6th, C. Kiss, and A. Mo6r ..................................... 125
Triggered Core Formation in Nearby Clouds
L.V. T6th and A. Horvath ........................................... 129
Searching for New Young Stars in the IRAS
Point Source Catalog
H.J. Walker, T.L. Lim, B.M. Swinyard, P.J. Richards, and R.J. Emery 133
x
Part IV Vega-Type, T-Tauri, ). Bootis
and Herbig Ae/Be Stars
Vega-Type Systems
P. Artymowicz ....................................................... 137
Far-Infrared Spatial Observations of Herbig Ae/Be Stars
and Low Mass Stars
H.M. Butner ......................................................... 149
A Boo Stars in the Orion OBl Association
M. Gerbaldi and R. Faraggiana ....................................... 157
Comets as a Source of the Dust in the f3 Pictoris Disk
J .M. Greenberg and A. Li ............................................ 161
Magnetic Fields of T Tauri Stars
E.W. Guenther and J.P. Emerson .................................... 175
Lambda Bootis Stars and 'Dusty' A Stars
H. Holweger and I. Rentzsch-Holm ................................... 179
Modelling of the IR Intensity Maps for HAEBE Stars
with Algol-Like Minima
V. Il'in, N. Krivova, and A. Men'shchikov ............................ 183
Multiwavelength Study of HAEBE Stars
with Algol-Like Minima
N. Krivova and V. Il'in ............................................... 187
Investigating the Circumstellar Morphology
of Herbig Ae/Be Stars
D. Lorenzetti, B. Nisini, S. Pezzuto, F. Strafella, and F. Berrilli 191
Coronographic Search for Dust Around Main Sequence Stars
D. Mouillet, A.-M. Lagrange, and J.-L. Beuzit ........................ 195
First Results of a Spectropolarimetric Survey
of Herbig Ae/Be Candidates
R.D. Oudmaijer and J .E. Drew ....................................... 199
Forbidden Emission Lines in the Winds
of Classical T Tauri Stars
G. Paatz and M. Camenzind ......................................... 203