Theory and observations of a jet in the _ orionis region: HH 444

The discovery of a system of Herbig{Haro objects ejected by young, low massstars in the Orionis region (Reipurth et al. 1998) has given rise to models of thephotoionization of a neutral jet by an external source.We present long{slit spectra of high spectral resolution of HH 444 and nu-merical simula...

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Bibliographic Details
Authors: J. A. López, J. Meaburn, A. C. Raga, L. López Martin
Format: article
Status:Published version
Publication Date:2001
Country:México
Institution:Universidad Nacional Autónoma de México
Repository:Redalyc-UNAM
OAI Identifier:oai:redalyc.org:57101018
Online Access:https://www.redalyc.org/articulo.oa?id=57101018
Access Level:Open access
Keyword:Física, Astronomía y Matemáticas
SHOCK WAVES
HYDRODYNAMICS
ISM: JETS AND OUTFLOWS
TECHNIQUES: SPECTROSCOPIC
ISM: INDIVIDUAL OBJECTS: HH 444
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oai_identifier_str oai:redalyc.org:57101018
network_acronym_str MX
network_name_str México
repository_id_str
spelling Theory and observations of a jet in the _ orionis region: HH 444J. A. LópezJ. MeaburnA. C. RagaL. López MartinFísica, Astronomía y MatemáticasSHOCK WAVESHYDRODYNAMICSISM: JETS AND OUTFLOWSTECHNIQUES: SPECTROSCOPICISM: INDIVIDUAL OBJECTS: HH 444The discovery of a system of Herbig{Haro objects ejected by young, low massstars in the Orionis region (Reipurth et al. 1998) has given rise to models of thephotoionization of a neutral jet by an external source.We present long{slit spectra of high spectral resolution of HH 444 and nu-merical simulations for this Herbig{Haro object using \yguazu", a 3D gasdynamic+radiative transfer code (Raga et al. 1999). We nd that a velocity prole in thejet beam is necessary to explain the observed accelaration in the position{velocitydiagram of the HH jet. We also need also assume a non{zero opening angle at thebase of the jet to explain the decreasing H intensity at increasing distances fromthe source and a variable ejection velocity to reproduce the well separated knotsobserved along the jet.Universidad Nacional Autónoma de México2001info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdf0185-1101https://www.redalyc.org/articulo.oa?id=57101018Revista Mexicana de Astronomía y Astrofísica (México) Vol.10reponame:Redalyc-UNAMinstname:Universidad Nacional Autónoma de Méxicoinstacron:UNAMenhttp://www.redalyc.org/revista.oa?id=571Revista Mexicana de Astronomía y Astrofísicainfo:eu-repo/semantics/openAccessoai:redalyc.org:571010182025-09-03T18:07:07Z
dc.title.none.fl_str_mv Theory and observations of a jet in the _ orionis region: HH 444
title Theory and observations of a jet in the _ orionis region: HH 444
spellingShingle Theory and observations of a jet in the _ orionis region: HH 444
J. A. López
Física, Astronomía y Matemáticas
SHOCK WAVES
HYDRODYNAMICS
ISM: JETS AND OUTFLOWS
TECHNIQUES: SPECTROSCOPIC
ISM: INDIVIDUAL OBJECTS: HH 444
title_short Theory and observations of a jet in the _ orionis region: HH 444
title_full Theory and observations of a jet in the _ orionis region: HH 444
title_fullStr Theory and observations of a jet in the _ orionis region: HH 444
title_full_unstemmed Theory and observations of a jet in the _ orionis region: HH 444
title_sort Theory and observations of a jet in the _ orionis region: HH 444
dc.creator.none.fl_str_mv J. A. López
J. Meaburn
A. C. Raga
L. López Martin
author J. A. López
author_facet J. A. López
J. Meaburn
A. C. Raga
L. López Martin
author_role author
author2 J. Meaburn
A. C. Raga
L. López Martin
author2_role author
author
author
dc.subject.none.fl_str_mv Física, Astronomía y Matemáticas
SHOCK WAVES
HYDRODYNAMICS
ISM: JETS AND OUTFLOWS
TECHNIQUES: SPECTROSCOPIC
ISM: INDIVIDUAL OBJECTS: HH 444
topic Física, Astronomía y Matemáticas
SHOCK WAVES
HYDRODYNAMICS
ISM: JETS AND OUTFLOWS
TECHNIQUES: SPECTROSCOPIC
ISM: INDIVIDUAL OBJECTS: HH 444
description The discovery of a system of Herbig{Haro objects ejected by young, low massstars in the Orionis region (Reipurth et al. 1998) has given rise to models of thephotoionization of a neutral jet by an external source.We present long{slit spectra of high spectral resolution of HH 444 and nu-merical simulations for this Herbig{Haro object using \yguazu", a 3D gasdynamic+radiative transfer code (Raga et al. 1999). We nd that a velocity prole in thejet beam is necessary to explain the observed accelaration in the position{velocitydiagram of the HH jet. We also need also assume a non{zero opening angle at thebase of the jet to explain the decreasing H intensity at increasing distances fromthe source and a variable ejection velocity to reproduce the well separated knotsobserved along the jet.
publishDate 2001
dc.date.none.fl_str_mv 2001
dc.type.none.fl_str_mv info:eu-repo/semantics/publishedVersion
info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv 0185-1101
https://www.redalyc.org/articulo.oa?id=57101018
identifier_str_mv 0185-1101
url https://www.redalyc.org/articulo.oa?id=57101018
dc.language.none.fl_str_mv en
language_invalid_str_mv en
dc.relation.none.fl_str_mv http://www.redalyc.org/revista.oa?id=571
dc.rights.none.fl_str_mv Revista Mexicana de Astronomía y Astrofísica
info:eu-repo/semantics/openAccess
rights_invalid_str_mv Revista Mexicana de Astronomía y Astrofísica
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Universidad Nacional Autónoma de México
publisher.none.fl_str_mv Universidad Nacional Autónoma de México
dc.source.none.fl_str_mv Revista Mexicana de Astronomía y Astrofísica (México) Vol.10
reponame:Redalyc-UNAM
instname:Universidad Nacional Autónoma de México
instacron:UNAM
instname_str Universidad Nacional Autónoma de México
instacron_str UNAM
institution UNAM
reponame_str Redalyc-UNAM
collection Redalyc-UNAM
repository.name.fl_str_mv
repository.mail.fl_str_mv
_version_ 1858175854133116928
score 14,964248

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