Observations of magnetic white dwarfs with extremely strong magnetic fields
Abstract
The magnetic fields of white dwarfs, whose intensity may reach several hundred megagauss, cause significant circular polarization in their continuous spectra, which is convenient for searching for new magnetic white dwarfs (MWDs) by means of photopolarization observations in the circular polarization mode. A series of such observations was carried out at SAO RAS using the multimode photometer-polarimeter (MMPP) mounted on the Zeiss-1000 telescope. To test the method and standards, observations of a set of known MWDs with extremely strong magnetic fields were conducted. In this study we present the observed data for two MWDs: GRW+708247 and WD1312+098. A comparison of the newly obtained observational data with those published three decades earlier allowed us to conclude that the magnetic fields in these two stars do not change their structure on a time scale of tens of years and longer.
- Publication:
-
INASAN Science Reports
- Pub Date:
- October 2023
- DOI:
- 10.51194/INASAN.2023.8.2.002
- Bibcode:
- 2023INASR...8...51A
- Keywords:
-
- white dwarfs;
- magnetic fields