Zeeman lines and a single cyclotron line in the low-accretion rate polar 1RXS J012851.9-233931 (RBS0206)
| dc.creator | Schwope, A. D. | |
| dc.creator | Schwarz, R. | |
| dc.creator | Greiner, J. | |
| dc.date | 1999-05-31 | |
| dc.date.accessioned | 2026-07-07T02:31:46Z | |
| dc.date.available | 2026-07-07T02:31:46Z | |
| dc.description | We present a low-resolution discovery spectrum and CCD-photometry of the bright X-ray source 1RXS J012851.9-233931 found in the ROSAT All-Sky Survey. These first observations suggest that the source is an AM Herculis star (polar) accreting at a low rate. The optical spectrum is dominated by Zeeman absorption features from the white dwarf, indicating a mean photospheric magnetic field of 36 +- 1 MG. Only weak Balmer line emission was observed. In the near infra-red, a single intense cyclotron hump was observed. The inferred magnetic field strength in the accretion plama is 45 +- 1 MG, the temperature in the plasma is below 2 keV. Likely orbital periods are ~90 min or ~146 min, the latter inside the cataclysmic variable period gap. The system is an ideal target for further detailed investigations of the field structure on a magnetic white dwarf by phase-resolved spectropolarimetry. | |
| dc.description | Astron. Astrophys., in press (see also http://www.aip.de/People/ASchwope | |
| dc.identifier | https://arxiv.org/abs/astro-ph/9905392 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/9905392 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/14272 | |
| dc.subject | Astrophysics | |
| dc.title | Zeeman lines and a single cyclotron line in the low-accretion rate polar 1RXS J012851.9-233931 (RBS0206) | |
| dc.type | text |