X-RAY and Radio Monitoring of GX 339-4 and CYG X-1
Abstract Previous work by Motch et al. [1985, Space Sci. Rev.40, 219] suggested that in the low/hard state of GX, the soft X-ray power-law extrapolated backward in energy agrees with the IR flux level. Corbel and Fender [2002, ApJ573, L35–L39] later showed that the typical hard state radio power-law...
Ausführliche Beschreibung
Gespeichert in:
| Autor*in: |
Nowak, Michael [verfasserIn] |
|---|
| Format: |
Artikel |
|---|---|
| Sprache: |
Englisch |
| Erschienen: |
2005 |
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| Schlagwörter: |
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| Anmerkung: |
© Springer Science + Business Media, Inc. 2005 |
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| Übergeordnetes Werk: |
Enthalten in: Astrophysics and space science - Kluwer Academic Publishers, 1968, 300(2005), 1-3 vom: Nov., Seite 159-166 |
|---|---|
| Übergeordnetes Werk: |
volume:300 ; year:2005 ; number:1-3 ; month:11 ; pages:159-166 |
| Links: |
|---|
| DOI / URN: |
10.1007/s10509-005-1180-0 |
|---|
| Katalog-ID: |
OLC206624595X |
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| 520 | |a Abstract Previous work by Motch et al. [1985, Space Sci. Rev.40, 219] suggested that in the low/hard state of GX, the soft X-ray power-law extrapolated backward in energy agrees with the IR flux level. Corbel and Fender [2002, ApJ573, L35–L39] later showed that the typical hard state radio power-law extrapolated forward in energy meets the backward extrapolated X-ray power-law at an IR spectral break, which was explicitly observed twice in GX. This has been cited as further evidence that jet synchrotron radiation might make a significant contribution to the observed X-rays in the hard state. We explore this hypothesis with a series of simultaneous radio/X-ray hard state observations of GX. We fit these spectra with a simple, but remarkably successful, doubly broken power-law model that indeed requires a spectral break in the IR. For most of these observations, the break position as a function of X-ray flux agrees with the jet model predictions. We then examine the radio flux/X-ray flux correlation in CYG through the use of 15 GHz radio data, obtained with the Ryle radio telescope, and Rossi X-ray Timing Explorer data, from the All Sky Monitor and pointed observations. We find evidence of ‘parallel tracks’ in the radio/X-ray correlation which are associated with ‘failed transitions’ to, or the beginning of a transition to, the soft state. We also find that for CYG the radio flux is more fundamentally correlated with the hard, rather than the soft, X-ray flux. | ||
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10.1007/s10509-005-1180-0 doi (DE-627)OLC206624595X (DE-He213)s10509-005-1180-0-p DE-627 ger DE-627 rakwb eng 520 530 620 VZ 16,12 ssgn Nowak, Michael verfasserin aut X-RAY and Radio Monitoring of GX 339-4 and CYG X-1 2005 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Springer Science + Business Media, Inc. 2005 Abstract Previous work by Motch et al. [1985, Space Sci. Rev.40, 219] suggested that in the low/hard state of GX, the soft X-ray power-law extrapolated backward in energy agrees with the IR flux level. Corbel and Fender [2002, ApJ573, L35–L39] later showed that the typical hard state radio power-law extrapolated forward in energy meets the backward extrapolated X-ray power-law at an IR spectral break, which was explicitly observed twice in GX. This has been cited as further evidence that jet synchrotron radiation might make a significant contribution to the observed X-rays in the hard state. We explore this hypothesis with a series of simultaneous radio/X-ray hard state observations of GX. We fit these spectra with a simple, but remarkably successful, doubly broken power-law model that indeed requires a spectral break in the IR. For most of these observations, the break position as a function of X-ray flux agrees with the jet model predictions. We then examine the radio flux/X-ray flux correlation in CYG through the use of 15 GHz radio data, obtained with the Ryle radio telescope, and Rossi X-ray Timing Explorer data, from the All Sky Monitor and pointed observations. We find evidence of ‘parallel tracks’ in the radio/X-ray correlation which are associated with ‘failed transitions’ to, or the beginning of a transition to, the soft state. We also find that for CYG the radio flux is more fundamentally correlated with the hard, rather than the soft, X-ray flux. accretion accretion disks black hole physics Enthalten in Astrophysics and space science Kluwer Academic Publishers, 1968 300(2005), 1-3 vom: Nov., Seite 159-166 (DE-627)129062723 (DE-600)629-4 (DE-576)014393522 0004-640X nnns volume:300 year:2005 number:1-3 month:11 pages:159-166 https://doi.org/10.1007/s10509-005-1180-0 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_2279 GBV_ILN_2286 GBV_ILN_4012 AR 300 2005 1-3 11 159-166 |
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10.1007/s10509-005-1180-0 doi (DE-627)OLC206624595X (DE-He213)s10509-005-1180-0-p DE-627 ger DE-627 rakwb eng 520 530 620 VZ 16,12 ssgn Nowak, Michael verfasserin aut X-RAY and Radio Monitoring of GX 339-4 and CYG X-1 2005 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier © Springer Science + Business Media, Inc. 2005 Abstract Previous work by Motch et al. [1985, Space Sci. Rev.40, 219] suggested that in the low/hard state of GX, the soft X-ray power-law extrapolated backward in energy agrees with the IR flux level. Corbel and Fender [2002, ApJ573, L35–L39] later showed that the typical hard state radio power-law extrapolated forward in energy meets the backward extrapolated X-ray power-law at an IR spectral break, which was explicitly observed twice in GX. This has been cited as further evidence that jet synchrotron radiation might make a significant contribution to the observed X-rays in the hard state. We explore this hypothesis with a series of simultaneous radio/X-ray hard state observations of GX. We fit these spectra with a simple, but remarkably successful, doubly broken power-law model that indeed requires a spectral break in the IR. For most of these observations, the break position as a function of X-ray flux agrees with the jet model predictions. We then examine the radio flux/X-ray flux correlation in CYG through the use of 15 GHz radio data, obtained with the Ryle radio telescope, and Rossi X-ray Timing Explorer data, from the All Sky Monitor and pointed observations. We find evidence of ‘parallel tracks’ in the radio/X-ray correlation which are associated with ‘failed transitions’ to, or the beginning of a transition to, the soft state. We also find that for CYG the radio flux is more fundamentally correlated with the hard, rather than the soft, X-ray flux. accretion accretion disks black hole physics Enthalten in Astrophysics and space science Kluwer Academic Publishers, 1968 300(2005), 1-3 vom: Nov., Seite 159-166 (DE-627)129062723 (DE-600)629-4 (DE-576)014393522 0004-640X nnns volume:300 year:2005 number:1-3 month:11 pages:159-166 https://doi.org/10.1007/s10509-005-1180-0 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_2279 GBV_ILN_2286 GBV_ILN_4012 AR 300 2005 1-3 11 159-166 |
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X-RAY and Radio Monitoring of GX 339-4 and CYG X-1 |
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X-RAY and Radio Monitoring of GX 339-4 and CYG X-1 |
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Nowak, Michael |
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Astrophysics and space science |
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x-ray and radio monitoring of gx 339-4 and cyg x-1 |
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X-RAY and Radio Monitoring of GX 339-4 and CYG X-1 |
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Abstract Previous work by Motch et al. [1985, Space Sci. Rev.40, 219] suggested that in the low/hard state of GX, the soft X-ray power-law extrapolated backward in energy agrees with the IR flux level. Corbel and Fender [2002, ApJ573, L35–L39] later showed that the typical hard state radio power-law extrapolated forward in energy meets the backward extrapolated X-ray power-law at an IR spectral break, which was explicitly observed twice in GX. This has been cited as further evidence that jet synchrotron radiation might make a significant contribution to the observed X-rays in the hard state. We explore this hypothesis with a series of simultaneous radio/X-ray hard state observations of GX. We fit these spectra with a simple, but remarkably successful, doubly broken power-law model that indeed requires a spectral break in the IR. For most of these observations, the break position as a function of X-ray flux agrees with the jet model predictions. We then examine the radio flux/X-ray flux correlation in CYG through the use of 15 GHz radio data, obtained with the Ryle radio telescope, and Rossi X-ray Timing Explorer data, from the All Sky Monitor and pointed observations. We find evidence of ‘parallel tracks’ in the radio/X-ray correlation which are associated with ‘failed transitions’ to, or the beginning of a transition to, the soft state. We also find that for CYG the radio flux is more fundamentally correlated with the hard, rather than the soft, X-ray flux. © Springer Science + Business Media, Inc. 2005 |
| abstractGer |
Abstract Previous work by Motch et al. [1985, Space Sci. Rev.40, 219] suggested that in the low/hard state of GX, the soft X-ray power-law extrapolated backward in energy agrees with the IR flux level. Corbel and Fender [2002, ApJ573, L35–L39] later showed that the typical hard state radio power-law extrapolated forward in energy meets the backward extrapolated X-ray power-law at an IR spectral break, which was explicitly observed twice in GX. This has been cited as further evidence that jet synchrotron radiation might make a significant contribution to the observed X-rays in the hard state. We explore this hypothesis with a series of simultaneous radio/X-ray hard state observations of GX. We fit these spectra with a simple, but remarkably successful, doubly broken power-law model that indeed requires a spectral break in the IR. For most of these observations, the break position as a function of X-ray flux agrees with the jet model predictions. We then examine the radio flux/X-ray flux correlation in CYG through the use of 15 GHz radio data, obtained with the Ryle radio telescope, and Rossi X-ray Timing Explorer data, from the All Sky Monitor and pointed observations. We find evidence of ‘parallel tracks’ in the radio/X-ray correlation which are associated with ‘failed transitions’ to, or the beginning of a transition to, the soft state. We also find that for CYG the radio flux is more fundamentally correlated with the hard, rather than the soft, X-ray flux. © Springer Science + Business Media, Inc. 2005 |
| abstract_unstemmed |
Abstract Previous work by Motch et al. [1985, Space Sci. Rev.40, 219] suggested that in the low/hard state of GX, the soft X-ray power-law extrapolated backward in energy agrees with the IR flux level. Corbel and Fender [2002, ApJ573, L35–L39] later showed that the typical hard state radio power-law extrapolated forward in energy meets the backward extrapolated X-ray power-law at an IR spectral break, which was explicitly observed twice in GX. This has been cited as further evidence that jet synchrotron radiation might make a significant contribution to the observed X-rays in the hard state. We explore this hypothesis with a series of simultaneous radio/X-ray hard state observations of GX. We fit these spectra with a simple, but remarkably successful, doubly broken power-law model that indeed requires a spectral break in the IR. For most of these observations, the break position as a function of X-ray flux agrees with the jet model predictions. We then examine the radio flux/X-ray flux correlation in CYG through the use of 15 GHz radio data, obtained with the Ryle radio telescope, and Rossi X-ray Timing Explorer data, from the All Sky Monitor and pointed observations. We find evidence of ‘parallel tracks’ in the radio/X-ray correlation which are associated with ‘failed transitions’ to, or the beginning of a transition to, the soft state. We also find that for CYG the radio flux is more fundamentally correlated with the hard, rather than the soft, X-ray flux. © Springer Science + Business Media, Inc. 2005 |
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X-RAY and Radio Monitoring of GX 339-4 and CYG X-1 |
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