File Download
There are no files associated with this item.
Links for fulltext
(May Require Subscription)
- Publisher Website: 10.1086/524373
- Scopus: eid_2-s2.0-40249083100
- WOS: WOS:000253454300023
- Find via
Supplementary
- Citations:
- Appears in Collections:
Article: Massive expanding torus and east outflow in planetary nebula NGC 6302
Title | Massive expanding torus and east outflow in planetary nebula NGC 6302 |
---|---|
Authors | |
Keywords | Circumstellar Matter Planetary Nebulae: Individual (Noc 6302) |
Issue Date | 2008 |
Publisher | Institute of Physics Publishing Ltd. The Journal's web site is located at http://iopscience.iop.org/2041-8205 |
Citation | Astrophysical Journal Letters, 2008, v. 673 n. 2, p. 934-941 How to Cite? |
Abstract | We present interferometric observations of 12CO and 13CO J = 2-1 emission from the butterfly-shaped, young planetary nebula NGC 6302. The high angular resolution and high sensitivity achieved in our observations allow us to resolve the nebula into two distinct kinematic components: (1) a massive expanding torus seen almost edge-on and oriented in the north-south direction (roughly perpendicular to the optical nebula axis), which exhibits very complex and fragmented structure; and (2) high-velocity molecular knots moving at more than 20 km s-1 and located in the optical bipolar lobes. These knots show a linear position-velocity gradient (Hubble-like now), which is characteristic of fast molecular outflow in young planetary nebulae. From the low but variable 12CO/13CO J = 2-1 line intensity ratio, we conclude that the 12CO J = 2-1 emission is optically thick over much of the nebula. Using the optically thinner line 13CO J = 2-1, we estimate a total molecular gas mass of ∼0.1 M⊙, comparable to the ionized gas mass; the total gas mass of the NOC 6302 nebula, including the massive ionized gas from the photon dominated region, is found to be ∼0.5 M⊙. From radiative transfer modeling, we infer that the torus is seen at an inclination angle of 75° with respect to the plane of the sky, and is expanding at a velocity of 15 km s-1. Comparison with recent observations of molecular gas in NGC 6302 is also discussed. © 2008. The American Astronomical Society. All rights reserved. |
Persistent Identifier | http://hdl.handle.net/10722/175110 |
ISSN | 2023 Impact Factor: 8.8 2023 SCImago Journal Rankings: 2.766 |
ISI Accession Number ID |
DC Field | Value | Language |
---|---|---|
dc.contributor.author | DinhVTrung | en_US |
dc.contributor.author | Bujarrabal, V | en_US |
dc.contributor.author | CastroCarrizo, A | en_US |
dc.contributor.author | Lim, J | en_US |
dc.contributor.author | Kwok, S | en_US |
dc.date.accessioned | 2012-11-26T08:49:16Z | - |
dc.date.available | 2012-11-26T08:49:16Z | - |
dc.date.issued | 2008 | en_US |
dc.identifier.citation | Astrophysical Journal Letters, 2008, v. 673 n. 2, p. 934-941 | en_US |
dc.identifier.issn | 2041-8205 | en_US |
dc.identifier.uri | http://hdl.handle.net/10722/175110 | - |
dc.description.abstract | We present interferometric observations of 12CO and 13CO J = 2-1 emission from the butterfly-shaped, young planetary nebula NGC 6302. The high angular resolution and high sensitivity achieved in our observations allow us to resolve the nebula into two distinct kinematic components: (1) a massive expanding torus seen almost edge-on and oriented in the north-south direction (roughly perpendicular to the optical nebula axis), which exhibits very complex and fragmented structure; and (2) high-velocity molecular knots moving at more than 20 km s-1 and located in the optical bipolar lobes. These knots show a linear position-velocity gradient (Hubble-like now), which is characteristic of fast molecular outflow in young planetary nebulae. From the low but variable 12CO/13CO J = 2-1 line intensity ratio, we conclude that the 12CO J = 2-1 emission is optically thick over much of the nebula. Using the optically thinner line 13CO J = 2-1, we estimate a total molecular gas mass of ∼0.1 M⊙, comparable to the ionized gas mass; the total gas mass of the NOC 6302 nebula, including the massive ionized gas from the photon dominated region, is found to be ∼0.5 M⊙. From radiative transfer modeling, we infer that the torus is seen at an inclination angle of 75° with respect to the plane of the sky, and is expanding at a velocity of 15 km s-1. Comparison with recent observations of molecular gas in NGC 6302 is also discussed. © 2008. The American Astronomical Society. All rights reserved. | en_US |
dc.language | eng | en_US |
dc.publisher | Institute of Physics Publishing Ltd. The Journal's web site is located at http://iopscience.iop.org/2041-8205 | en_US |
dc.relation.ispartof | Astrophysical Journal Letters | en_US |
dc.rights | The Astrophysical Journal. Copyright © University of Chicago Press. | - |
dc.subject | Circumstellar Matter | en_US |
dc.subject | Planetary Nebulae: Individual (Noc 6302) | en_US |
dc.title | Massive expanding torus and east outflow in planetary nebula NGC 6302 | en_US |
dc.type | Article | en_US |
dc.identifier.email | Lim, J: jjlim@hku.hk | en_US |
dc.identifier.email | Kwok, S: deannote@hku.hk | en_US |
dc.identifier.authority | Lim, J=rp00745 | en_US |
dc.identifier.authority | Kwok, S=rp00716 | en_US |
dc.description.nature | link_to_subscribed_fulltext | en_US |
dc.identifier.doi | 10.1086/524373 | en_US |
dc.identifier.scopus | eid_2-s2.0-40249083100 | en_US |
dc.identifier.hkuros | 146075 | - |
dc.identifier.volume | 673 | en_US |
dc.identifier.issue | 2 | en_US |
dc.identifier.spage | 934 | en_US |
dc.identifier.epage | 941 | en_US |
dc.identifier.isi | WOS:000253454300023 | - |
dc.publisher.place | United Kingdom | en_US |
dc.identifier.scopusauthorid | DinhVTrung=6701469660 | en_US |
dc.identifier.scopusauthorid | Bujarrabal, V=7003330193 | en_US |
dc.identifier.scopusauthorid | CastroCarrizo, A=6603125220 | en_US |
dc.identifier.scopusauthorid | Lim, J=7403453870 | en_US |
dc.identifier.scopusauthorid | Kwok, S=22980498300 | en_US |
dc.identifier.issnl | 2041-8205 | - |