The Relative Sizes of Planetary Nebulae
Abstract The sizes of planetary nebulae are poorly known, principally because the distances to these sources are not very well established. We point out in the following, however, that if one is careful in selecting nebulae having particular ranges of galactic latitude, and narrow ranges of surface...
Ausführliche Beschreibung
Gespeichert in:
| Autor*in: |
Phillips, J.P. [verfasserIn] |
|---|
| Format: |
Artikel |
|---|---|
| Sprache: |
Englisch |
| Erschienen: |
2003 |
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| Schlagwörter: |
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| Anmerkung: |
© Kluwer Academic Publishers 2003 |
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| Übergeordnetes Werk: |
Enthalten in: Astrophysics and space science - Kluwer Academic Publishers, 1968, 288(2003), 3 vom: Nov., Seite 341-351 |
|---|---|
| Übergeordnetes Werk: |
volume:288 ; year:2003 ; number:3 ; month:11 ; pages:341-351 |
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10.1023/B:ASTR.0000006043.92296.ea |
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| 520 | |a Abstract The sizes of planetary nebulae are poorly known, principally because the distances to these sources are not very well established. We point out in the following, however, that if one is careful in selecting nebulae having particular ranges of galactic latitude, and narrow ranges of surface brightness, then it should be possible to establish mean trends in nebular diameter. We have, in this way, been able to determine that where brightness temperatures are the same, then circular and elliptical sources, and the nuclei of bipolar nebulae (BPNe) all have closely similar mean dimensions. It is also likely that circular and elliptical sources have closely similar masses (the case of the BPNe is less clear). Finally, we note that halos are typically ∼3 times larger than circular and elliptical PNe, and the lobes of BPNe are ∼5 times as large, making the latter envelopes the largest of all nebular structures. | ||
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10.1023/B:ASTR.0000006043.92296.ea doi (DE-627)OLC2066239283 (DE-He213)B:ASTR.0000006043.92296.ea-p DE-627 ger DE-627 rakwb eng 520 530 620 VZ 16,12 ssgn Phillips, J.P. verfasserin aut The Relative Sizes of Planetary Nebulae 2003 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Kluwer Academic Publishers 2003 Abstract The sizes of planetary nebulae are poorly known, principally because the distances to these sources are not very well established. We point out in the following, however, that if one is careful in selecting nebulae having particular ranges of galactic latitude, and narrow ranges of surface brightness, then it should be possible to establish mean trends in nebular diameter. We have, in this way, been able to determine that where brightness temperatures are the same, then circular and elliptical sources, and the nuclei of bipolar nebulae (BPNe) all have closely similar mean dimensions. It is also likely that circular and elliptical sources have closely similar masses (the case of the BPNe is less clear). Finally, we note that halos are typically ∼3 times larger than circular and elliptical PNe, and the lobes of BPNe are ∼5 times as large, making the latter envelopes the largest of all nebular structures. Brightness Temperature Surface Brightness Angular Size Galactic Plane Planetary Nebula Enthalten in Astrophysics and space science Kluwer Academic Publishers, 1968 288(2003), 3 vom: Nov., Seite 341-351 (DE-627)129062723 (DE-600)629-4 (DE-576)014393522 0004-640X nnns volume:288 year:2003 number:3 month:11 pages:341-351 https://doi.org/10.1023/B:ASTR.0000006043.92296.ea lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-TEC SSG-OLC-PHY SSG-OLC-AST SSG-OPC-AST GBV_ILN_11 GBV_ILN_40 GBV_ILN_47 GBV_ILN_70 GBV_ILN_2002 GBV_ILN_2279 GBV_ILN_2286 GBV_ILN_4012 AR 288 2003 3 11 341-351 |
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10.1023/B:ASTR.0000006043.92296.ea doi (DE-627)OLC2066239283 (DE-He213)B:ASTR.0000006043.92296.ea-p DE-627 ger DE-627 rakwb eng 520 530 620 VZ 16,12 ssgn Phillips, J.P. verfasserin aut The Relative Sizes of Planetary Nebulae 2003 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Kluwer Academic Publishers 2003 Abstract The sizes of planetary nebulae are poorly known, principally because the distances to these sources are not very well established. We point out in the following, however, that if one is careful in selecting nebulae having particular ranges of galactic latitude, and narrow ranges of surface brightness, then it should be possible to establish mean trends in nebular diameter. We have, in this way, been able to determine that where brightness temperatures are the same, then circular and elliptical sources, and the nuclei of bipolar nebulae (BPNe) all have closely similar mean dimensions. It is also likely that circular and elliptical sources have closely similar masses (the case of the BPNe is less clear). Finally, we note that halos are typically ∼3 times larger than circular and elliptical PNe, and the lobes of BPNe are ∼5 times as large, making the latter envelopes the largest of all nebular structures. Brightness Temperature Surface Brightness Angular Size Galactic Plane Planetary Nebula Enthalten in Astrophysics and space science Kluwer Academic Publishers, 1968 288(2003), 3 vom: Nov., Seite 341-351 (DE-627)129062723 (DE-600)629-4 (DE-576)014393522 0004-640X nnns volume:288 year:2003 number:3 month:11 pages:341-351 https://doi.org/10.1023/B:ASTR.0000006043.92296.ea lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-TEC SSG-OLC-PHY SSG-OLC-AST SSG-OPC-AST GBV_ILN_11 GBV_ILN_40 GBV_ILN_47 GBV_ILN_70 GBV_ILN_2002 GBV_ILN_2279 GBV_ILN_2286 GBV_ILN_4012 AR 288 2003 3 11 341-351 |
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10.1023/B:ASTR.0000006043.92296.ea doi (DE-627)OLC2066239283 (DE-He213)B:ASTR.0000006043.92296.ea-p DE-627 ger DE-627 rakwb eng 520 530 620 VZ 16,12 ssgn Phillips, J.P. verfasserin aut The Relative Sizes of Planetary Nebulae 2003 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Kluwer Academic Publishers 2003 Abstract The sizes of planetary nebulae are poorly known, principally because the distances to these sources are not very well established. We point out in the following, however, that if one is careful in selecting nebulae having particular ranges of galactic latitude, and narrow ranges of surface brightness, then it should be possible to establish mean trends in nebular diameter. We have, in this way, been able to determine that where brightness temperatures are the same, then circular and elliptical sources, and the nuclei of bipolar nebulae (BPNe) all have closely similar mean dimensions. It is also likely that circular and elliptical sources have closely similar masses (the case of the BPNe is less clear). Finally, we note that halos are typically ∼3 times larger than circular and elliptical PNe, and the lobes of BPNe are ∼5 times as large, making the latter envelopes the largest of all nebular structures. Brightness Temperature Surface Brightness Angular Size Galactic Plane Planetary Nebula Enthalten in Astrophysics and space science Kluwer Academic Publishers, 1968 288(2003), 3 vom: Nov., Seite 341-351 (DE-627)129062723 (DE-600)629-4 (DE-576)014393522 0004-640X nnns volume:288 year:2003 number:3 month:11 pages:341-351 https://doi.org/10.1023/B:ASTR.0000006043.92296.ea lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-TEC SSG-OLC-PHY SSG-OLC-AST SSG-OPC-AST GBV_ILN_11 GBV_ILN_40 GBV_ILN_47 GBV_ILN_70 GBV_ILN_2002 GBV_ILN_2279 GBV_ILN_2286 GBV_ILN_4012 AR 288 2003 3 11 341-351 |
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Abstract The sizes of planetary nebulae are poorly known, principally because the distances to these sources are not very well established. We point out in the following, however, that if one is careful in selecting nebulae having particular ranges of galactic latitude, and narrow ranges of surface brightness, then it should be possible to establish mean trends in nebular diameter. We have, in this way, been able to determine that where brightness temperatures are the same, then circular and elliptical sources, and the nuclei of bipolar nebulae (BPNe) all have closely similar mean dimensions. It is also likely that circular and elliptical sources have closely similar masses (the case of the BPNe is less clear). Finally, we note that halos are typically ∼3 times larger than circular and elliptical PNe, and the lobes of BPNe are ∼5 times as large, making the latter envelopes the largest of all nebular structures. © Kluwer Academic Publishers 2003 |
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Abstract The sizes of planetary nebulae are poorly known, principally because the distances to these sources are not very well established. We point out in the following, however, that if one is careful in selecting nebulae having particular ranges of galactic latitude, and narrow ranges of surface brightness, then it should be possible to establish mean trends in nebular diameter. We have, in this way, been able to determine that where brightness temperatures are the same, then circular and elliptical sources, and the nuclei of bipolar nebulae (BPNe) all have closely similar mean dimensions. It is also likely that circular and elliptical sources have closely similar masses (the case of the BPNe is less clear). Finally, we note that halos are typically ∼3 times larger than circular and elliptical PNe, and the lobes of BPNe are ∼5 times as large, making the latter envelopes the largest of all nebular structures. © Kluwer Academic Publishers 2003 |
| abstract_unstemmed |
Abstract The sizes of planetary nebulae are poorly known, principally because the distances to these sources are not very well established. We point out in the following, however, that if one is careful in selecting nebulae having particular ranges of galactic latitude, and narrow ranges of surface brightness, then it should be possible to establish mean trends in nebular diameter. We have, in this way, been able to determine that where brightness temperatures are the same, then circular and elliptical sources, and the nuclei of bipolar nebulae (BPNe) all have closely similar mean dimensions. It is also likely that circular and elliptical sources have closely similar masses (the case of the BPNe is less clear). Finally, we note that halos are typically ∼3 times larger than circular and elliptical PNe, and the lobes of BPNe are ∼5 times as large, making the latter envelopes the largest of all nebular structures. © Kluwer Academic Publishers 2003 |
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| title_short |
The Relative Sizes of Planetary Nebulae |
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