Multifrequency observations of the BL Lacertae objects OQ 530 and ON 325

D. M. Worrall; J. J. Puschell; F. C. Bruhweiler; M. L. Sitko; W. A. Stein; M. F. Aller; H. D. Aller; P. E. Hodge; R. J. Rudy; H. R. Miller; W. Z. Wisniewski; F. A. Cordova; K. O. Mason

Multifrequency observations of the BL Lacertae objects OQ 530 and ON 325

D. M. Worrall, J. J. Puschell, F. C. Bruhweiler, M. L. Sitko, W. A. Stein, M. F. Aller, H. D. Aller, P. E. Hodge, R. J. Rudy, H. R. Miller, W. Z. Wisniewski, F. A. Cordova, K. O. Mason

School of Physics

Research output: Contribution to journal › Article (Academic Journal) › peer-review

Abstract

Spectral measurements of the two BL Lac objects OQ 530 and ON 325 are presented. The measurements were taken at frequencies ranging from radio to ultraviolet. Both sources show spectral curvature between the infrared and ultraviolet frequencies. The intensity and spectral shape of OQ 530 vary, but the spectral shape of ON 325 appears to remain constant during intensity variability. A nonthermal theoretical model of jet emission is developed which incorporates both the spectral and time variability data. The model predicts that ON 325 radiates at X-ray frequencies with Compton radiation dominating over synchrotron emission. The angular size of the jet emission is predicted to be less than 0.1 milli-arcsec at high radio frequencies.

Original language	English
Pages (from-to)	512-518
Journal	Astrophysical Journal
Volume	284
Publication status	Published - 1 Sept 1984

Keywords

Astronomical Spectroscopy
Bl Lacertae Objects
Radiation Sources
Compton Effect
Infrared Spectra
Iue
Radio Spectra
Synchrotron Radiation
X Ray Spectra

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@article{13a8609fd3df49cb89a26c7267e24dde,

title = "Multifrequency observations of the BL Lacertae objects OQ 530 and ON 325",

abstract = "Spectral measurements of the two BL Lac objects OQ 530 and ON 325 are presented. The measurements were taken at frequencies ranging from radio to ultraviolet. Both sources show spectral curvature between the infrared and ultraviolet frequencies. The intensity and spectral shape of OQ 530 vary, but the spectral shape of ON 325 appears to remain constant during intensity variability. A nonthermal theoretical model of jet emission is developed which incorporates both the spectral and time variability data. The model predicts that ON 325 radiates at X-ray frequencies with Compton radiation dominating over synchrotron emission. The angular size of the jet emission is predicted to be less than 0.1 milli-arcsec at high radio frequencies.",

keywords = "Astronomical Spectroscopy, Bl Lacertae Objects, Radiation Sources, Compton Effect, Infrared Spectra, Iue, Radio Spectra, Synchrotron Radiation, X Ray Spectra",

author = "Worrall, {D. M.} and Puschell, {J. J.} and Bruhweiler, {F. C.} and Sitko, {M. L.} and Stein, {W. A.} and Aller, {M. F.} and Aller, {H. D.} and Hodge, {P. E.} and Rudy, {R. J.} and Miller, {H. R.} and Wisniewski, {W. Z.} and Cordova, {F. A.} and Mason, {K. O.}",

year = "1984",

month = sep,

day = "1",

language = "English",

volume = "284",

pages = "512--518",

journal = "Astrophysical Journal",

issn = "0004-637X",

publisher = "American Astronomical Society",

}

TY - JOUR

T1 - Multifrequency observations of the BL Lacertae objects OQ 530 and ON 325

AU - Worrall, D. M.

AU - Puschell, J. J.

AU - Bruhweiler, F. C.

AU - Sitko, M. L.

AU - Stein, W. A.

AU - Aller, M. F.

AU - Aller, H. D.

AU - Hodge, P. E.

AU - Rudy, R. J.

AU - Miller, H. R.

AU - Wisniewski, W. Z.

AU - Cordova, F. A.

AU - Mason, K. O.

PY - 1984/9/1

Y1 - 1984/9/1

N2 - Spectral measurements of the two BL Lac objects OQ 530 and ON 325 are presented. The measurements were taken at frequencies ranging from radio to ultraviolet. Both sources show spectral curvature between the infrared and ultraviolet frequencies. The intensity and spectral shape of OQ 530 vary, but the spectral shape of ON 325 appears to remain constant during intensity variability. A nonthermal theoretical model of jet emission is developed which incorporates both the spectral and time variability data. The model predicts that ON 325 radiates at X-ray frequencies with Compton radiation dominating over synchrotron emission. The angular size of the jet emission is predicted to be less than 0.1 milli-arcsec at high radio frequencies.

AB - Spectral measurements of the two BL Lac objects OQ 530 and ON 325 are presented. The measurements were taken at frequencies ranging from radio to ultraviolet. Both sources show spectral curvature between the infrared and ultraviolet frequencies. The intensity and spectral shape of OQ 530 vary, but the spectral shape of ON 325 appears to remain constant during intensity variability. A nonthermal theoretical model of jet emission is developed which incorporates both the spectral and time variability data. The model predicts that ON 325 radiates at X-ray frequencies with Compton radiation dominating over synchrotron emission. The angular size of the jet emission is predicted to be less than 0.1 milli-arcsec at high radio frequencies.

KW - Astronomical Spectroscopy

KW - Bl Lacertae Objects

KW - Radiation Sources

KW - Compton Effect

KW - Infrared Spectra

KW - Iue

KW - Radio Spectra

KW - Synchrotron Radiation

KW - X Ray Spectra

M3 - Article (Academic Journal)

SN - 0004-637X

VL - 284

SP - 512

EP - 518

JO - Astrophysical Journal

JF - Astrophysical Journal

ER -

Multifrequency observations of the BL Lacertae objects OQ 530 and ON 325

Abstract

Keywords

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