Wilman, R. J. and Fabian, A. C. and Cutri, R. M. and Crawford, C. S. and Brandt, W. N. (1998) Limits on the X-ray emission from several hyperluminous IRAS galaxies. Monthly Notices of the Royal Astronomical Society, 300 (1). L7-L10. ISSN 0035-8711. doi:10.1046/j.1365-8711.1998.02047.x. https://resolver.caltech.edu/CaltechAUTHORS:20180511-134005454
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Abstract
We report long, pointed ROSAT HRI observations of the hyperluminous galaxies IRAS F00235+1024, F12514+1027, F14481+4454 and F14537+1950. Two of them are optically classified as Seyfert-like. No X-ray sources are detected at the positions of any of the objects, with a mean upper limit L_X/L_(Bo)l ≃ 2.3 × 10^(−4). This indicates that any active nuclei are either atypically weak at X-ray wavelengths or obscured by column densities N_H > 10^(23) cm^(−2). They differ markedly from ‘ordinary’ Seyfert 2 galaxies, bearing a closer resemblance in the soft X-ray band to composite Seyfert 2 galaxies or to some types of starburst.
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| Additional Information: | © 1998 RAS. Accepted 1998 August 6. Received 1998 August 5; in original form 1998 April 27. We thank Richard McMahon for advance information about IRAS F00235+1024. ACF and CSC thank the Royal Society for support, and RJW acknowledges support from PPARC. RMC acknowledges the support of the Jet Propulsion Laboratory, Caltech, which is operated under contract with NASA. | |||||||||
| Group: | Infrared Processing and Analysis Center (IPAC) | |||||||||
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| Subject Keywords: | galaxies: individual: IRAS F00235+1024, galaxies: individual: F12514+1027, galaxies: individual: F14481+4454, galaxies: individual: F14537+1950, infrared: galaxies, X-rays: galaxies | |||||||||
| Issue or Number: | 1 | |||||||||
| DOI: | 10.1046/j.1365-8711.1998.02047.x | |||||||||
| Record Number: | CaltechAUTHORS:20180511-134005454 | |||||||||
| Persistent URL: | https://resolver.caltech.edu/CaltechAUTHORS:20180511-134005454 | |||||||||
| Official Citation: | R. J. Wilman, A. C. Fabian, R. M. Cutri, C. S. Crawford, W. N. Brandt; Limits on the X-ray emission from several hyperluminous IRAS galaxies, Monthly Notices of the Royal Astronomical Society, Volume 300, Issue 1, 11 October 1998, Pages L7–L10, https://doi.org/10.1046/j.1365-8711.1998.02047.x | |||||||||
| Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. | |||||||||
| ID Code: | 86366 | |||||||||
| Collection: | CaltechAUTHORS | |||||||||
| Deposited By: | George Porter | |||||||||
| Deposited On: | 14 May 2018 15:19 | |||||||||
| Last Modified: | 15 Nov 2021 20:37 |
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