HST/WFPC2 and VLT/ISAAC observations of proplyds in the giant H II region NGC 3603
Autor(a) principal: | |
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Data de Publicação: | 2000 |
Outros Autores: | , , , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFRGS |
Texto Completo: | http://hdl.handle.net/10183/108231 |
Resumo: | We report the discovery of three proplyd-like structures in the giant H II region NGC 3603. The emission nebulae are clearly resolved in narrowband and broadband HST/WFPC2 observations in the optical and broadband VLT/ISAAC observations in the near-infrared. All three nebulae are tadpole shaped, with the bright ionization front at the head facing the central cluster and a fainter ionization front around the tail pointing away from the cluster. Typical sizes are 6000 AU x 20,000 AU The nebulae share the overall morphology of the proplyds (PROto PLanetarY DiskS) in Orion, but are 20 to 30 times larger in size. Additional faint filaments located between the nebulae and the central ionizing cluster can be interpreted as bow shocks resulting from the interaction of the fast winds from the highmass stars in the cluster with the evaporation flow from the proplyds. Low-resolution spectra of the brightest nebula, which is at a projected separation of 1.3 pc from the cluster, reveal that it has the spectral excitation characteristics of an ultra compact H II region with electron densities well in excess of 104 cm-³. The near-infrared data reveal a point source superposed on the ionization front. The striking similarity of the tadpole-shaped emission nebulae in NGC 3603 to the proplyds in Orion suggests that the physical structure of both types of objects might be the same. We present two-dimensional radiation hydrodynamical simulations of an externally illuminated star-disk-envelope system, which was still in its main accretion phase when Ðrst exposed to ionizing radiation from the central cluster. The simulations reproduce the overall morphology of the proplyds in NGC 3603 very well, but also indicate that massloss rates of up to 10-5 Mʘ yr-ˡ are required in order to explain the size of the proplyds. Due to these high mass-loss rates, the proplyds in NGC 3603 should only survive ≈105 yr. Despite this short survival time, we detect three proplyds. This indicates that circumstellar disks must be common around young stars in NGC 3603 and that these particular proplyds have only recently been exposed to their present harsh UV environment. |
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Brandner, WolfgangGrebel, Eva K.Chu, You-HuaDottori, Horacio AlbertoBrandl, BernhardRichling, SabineYorke, Harold W.Points, Sean D.Zinnecker, Hans2014-12-13T02:17:57Z20000004-6256http://hdl.handle.net/10183/108231000275524We report the discovery of three proplyd-like structures in the giant H II region NGC 3603. The emission nebulae are clearly resolved in narrowband and broadband HST/WFPC2 observations in the optical and broadband VLT/ISAAC observations in the near-infrared. All three nebulae are tadpole shaped, with the bright ionization front at the head facing the central cluster and a fainter ionization front around the tail pointing away from the cluster. Typical sizes are 6000 AU x 20,000 AU The nebulae share the overall morphology of the proplyds (PROto PLanetarY DiskS) in Orion, but are 20 to 30 times larger in size. Additional faint filaments located between the nebulae and the central ionizing cluster can be interpreted as bow shocks resulting from the interaction of the fast winds from the highmass stars in the cluster with the evaporation flow from the proplyds. Low-resolution spectra of the brightest nebula, which is at a projected separation of 1.3 pc from the cluster, reveal that it has the spectral excitation characteristics of an ultra compact H II region with electron densities well in excess of 104 cm-³. The near-infrared data reveal a point source superposed on the ionization front. The striking similarity of the tadpole-shaped emission nebulae in NGC 3603 to the proplyds in Orion suggests that the physical structure of both types of objects might be the same. We present two-dimensional radiation hydrodynamical simulations of an externally illuminated star-disk-envelope system, which was still in its main accretion phase when Ðrst exposed to ionizing radiation from the central cluster. The simulations reproduce the overall morphology of the proplyds in NGC 3603 very well, but also indicate that massloss rates of up to 10-5 Mʘ yr-ˡ are required in order to explain the size of the proplyds. Due to these high mass-loss rates, the proplyds in NGC 3603 should only survive ≈105 yr. Despite this short survival time, we detect three proplyds. This indicates that circumstellar disks must be common around young stars in NGC 3603 and that these particular proplyds have only recently been exposed to their present harsh UV environment.application/pdfengThe Astronomical journal. Chicago. Vol. 119, no. 1 (Jan. 2000), p. 292-301Fotometria astronômicaMaterial circum-estelarRegiões HIIAstronomia infravermelhaEstrelas pré-seqüência principalCircumstellar matterStars : formationStars : pre-main sequenceOpen clusters and associations : individual (NGC 3603)ISM: individual (NGC 3603)HST/WFPC2 and VLT/ISAAC observations of proplyds in the giant H II region NGC 3603Estrangeiroinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFRGSinstname:Universidade Federal do Rio Grande do Sul (UFRGS)instacron:UFRGSORIGINAL000275524.pdf000275524.pdfTexto completo (inglês)application/pdf774266http://www.lume.ufrgs.br/bitstream/10183/108231/1/000275524.pdf6dafc9862fa39abf117a01d1306d11c6MD51TEXT000275524.pdf.txt000275524.pdf.txtExtracted Texttext/plain46159http://www.lume.ufrgs.br/bitstream/10183/108231/2/000275524.pdf.txt33dc1bfe2af1e9b91b0c9ecec5fce44dMD52THUMBNAIL000275524.pdf.jpg000275524.pdf.jpgGenerated Thumbnailimage/jpeg2210http://www.lume.ufrgs.br/bitstream/10183/108231/3/000275524.pdf.jpgbf8c4d8816d3346d359a1315dca77fa8MD5310183/1082312018-10-22 09:01:13.831oai:www.lume.ufrgs.br:10183/108231Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2018-10-22T12:01:13Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false |
dc.title.pt_BR.fl_str_mv |
HST/WFPC2 and VLT/ISAAC observations of proplyds in the giant H II region NGC 3603 |
title |
HST/WFPC2 and VLT/ISAAC observations of proplyds in the giant H II region NGC 3603 |
spellingShingle |
HST/WFPC2 and VLT/ISAAC observations of proplyds in the giant H II region NGC 3603 Brandner, Wolfgang Fotometria astronômica Material circum-estelar Regiões HII Astronomia infravermelha Estrelas pré-seqüência principal Circumstellar matter Stars : formation Stars : pre-main sequence Open clusters and associations : individual (NGC 3603) ISM: individual (NGC 3603) |
title_short |
HST/WFPC2 and VLT/ISAAC observations of proplyds in the giant H II region NGC 3603 |
title_full |
HST/WFPC2 and VLT/ISAAC observations of proplyds in the giant H II region NGC 3603 |
title_fullStr |
HST/WFPC2 and VLT/ISAAC observations of proplyds in the giant H II region NGC 3603 |
title_full_unstemmed |
HST/WFPC2 and VLT/ISAAC observations of proplyds in the giant H II region NGC 3603 |
title_sort |
HST/WFPC2 and VLT/ISAAC observations of proplyds in the giant H II region NGC 3603 |
author |
Brandner, Wolfgang |
author_facet |
Brandner, Wolfgang Grebel, Eva K. Chu, You-Hua Dottori, Horacio Alberto Brandl, Bernhard Richling, Sabine Yorke, Harold W. Points, Sean D. Zinnecker, Hans |
author_role |
author |
author2 |
Grebel, Eva K. Chu, You-Hua Dottori, Horacio Alberto Brandl, Bernhard Richling, Sabine Yorke, Harold W. Points, Sean D. Zinnecker, Hans |
author2_role |
author author author author author author author author |
dc.contributor.author.fl_str_mv |
Brandner, Wolfgang Grebel, Eva K. Chu, You-Hua Dottori, Horacio Alberto Brandl, Bernhard Richling, Sabine Yorke, Harold W. Points, Sean D. Zinnecker, Hans |
dc.subject.por.fl_str_mv |
Fotometria astronômica Material circum-estelar Regiões HII Astronomia infravermelha Estrelas pré-seqüência principal |
topic |
Fotometria astronômica Material circum-estelar Regiões HII Astronomia infravermelha Estrelas pré-seqüência principal Circumstellar matter Stars : formation Stars : pre-main sequence Open clusters and associations : individual (NGC 3603) ISM: individual (NGC 3603) |
dc.subject.eng.fl_str_mv |
Circumstellar matter Stars : formation Stars : pre-main sequence Open clusters and associations : individual (NGC 3603) ISM: individual (NGC 3603) |
description |
We report the discovery of three proplyd-like structures in the giant H II region NGC 3603. The emission nebulae are clearly resolved in narrowband and broadband HST/WFPC2 observations in the optical and broadband VLT/ISAAC observations in the near-infrared. All three nebulae are tadpole shaped, with the bright ionization front at the head facing the central cluster and a fainter ionization front around the tail pointing away from the cluster. Typical sizes are 6000 AU x 20,000 AU The nebulae share the overall morphology of the proplyds (PROto PLanetarY DiskS) in Orion, but are 20 to 30 times larger in size. Additional faint filaments located between the nebulae and the central ionizing cluster can be interpreted as bow shocks resulting from the interaction of the fast winds from the highmass stars in the cluster with the evaporation flow from the proplyds. Low-resolution spectra of the brightest nebula, which is at a projected separation of 1.3 pc from the cluster, reveal that it has the spectral excitation characteristics of an ultra compact H II region with electron densities well in excess of 104 cm-³. The near-infrared data reveal a point source superposed on the ionization front. The striking similarity of the tadpole-shaped emission nebulae in NGC 3603 to the proplyds in Orion suggests that the physical structure of both types of objects might be the same. We present two-dimensional radiation hydrodynamical simulations of an externally illuminated star-disk-envelope system, which was still in its main accretion phase when Ðrst exposed to ionizing radiation from the central cluster. The simulations reproduce the overall morphology of the proplyds in NGC 3603 very well, but also indicate that massloss rates of up to 10-5 Mʘ yr-ˡ are required in order to explain the size of the proplyds. Due to these high mass-loss rates, the proplyds in NGC 3603 should only survive ≈105 yr. Despite this short survival time, we detect three proplyds. This indicates that circumstellar disks must be common around young stars in NGC 3603 and that these particular proplyds have only recently been exposed to their present harsh UV environment. |
publishDate |
2000 |
dc.date.issued.fl_str_mv |
2000 |
dc.date.accessioned.fl_str_mv |
2014-12-13T02:17:57Z |
dc.type.driver.fl_str_mv |
Estrangeiro info:eu-repo/semantics/article |
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format |
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0004-6256 |
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000275524 |
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http://hdl.handle.net/10183/108231 |
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eng |
language |
eng |
dc.relation.ispartof.pt_BR.fl_str_mv |
The Astronomical journal. Chicago. Vol. 119, no. 1 (Jan. 2000), p. 292-301 |
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