Research output: Contribution to journal › Article › peer-review
Optical linear polarization of helium-rich white dwarfs sample with the RoboPol polarimeter. / Słowikowska, Aga; Krzeszowski, Krzysztof; Zejmo, Michał; Blinov, Dmitry; Reig, Pablo.
In: Monthly Notices of the Royal Astronomical Society, Vol. 479, No. 4, 01.10.2018, p. 5312-5324.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Optical linear polarization of helium-rich white dwarfs sample with the RoboPol polarimeter
AU - Słowikowska, Aga
AU - Krzeszowski, Krzysztof
AU - Zejmo, Michał
AU - Blinov, Dmitry
AU - Reig, Pablo
PY - 2018/10/1
Y1 - 2018/10/1
N2 - We performed observations of 28 white dwarfs (WDs) as the second part of our WD optical linear polarimetric survey. Our study shows that highly linear polarized WDs are very rare. However, three systems,WD1336+123 (DB+dM4), WD1415+234 (DBA) and WD1619+123 (DA+dG0), show linear polarization degree higher than 1 per cent. In particular,WD1415+234 with polarization degree ~2.6 per cent is the strongest polarizedWDin our total sample of 101 objects. We found that the median polarization degree of isolated DA WDs and DB WDs is similar but lower than the median polarization of isolated DC WDs. The DB WDs in binaries seem to be more polarized than binaries containing DA+dM or double-degenerated systems (DDSs) with DA component. Additionally, we present for the first time, the measurements of optical linear polarization of both components in two common proper motion binary systems (CPMB) systems: WD1336+123 and the Sirius-like system WD2129+000. Because the vast majority of WDs have very low polarization degree (<0.5 per cent), they can be used as faint linear polarization standards. Our sample covers SDSS r magnitude range from 13 to 17 and right ascension range from 13h to 24h, with the extension from 1h to 3h.
AB - We performed observations of 28 white dwarfs (WDs) as the second part of our WD optical linear polarimetric survey. Our study shows that highly linear polarized WDs are very rare. However, three systems,WD1336+123 (DB+dM4), WD1415+234 (DBA) and WD1619+123 (DA+dG0), show linear polarization degree higher than 1 per cent. In particular,WD1415+234 with polarization degree ~2.6 per cent is the strongest polarizedWDin our total sample of 101 objects. We found that the median polarization degree of isolated DA WDs and DB WDs is similar but lower than the median polarization of isolated DC WDs. The DB WDs in binaries seem to be more polarized than binaries containing DA+dM or double-degenerated systems (DDSs) with DA component. Additionally, we present for the first time, the measurements of optical linear polarization of both components in two common proper motion binary systems (CPMB) systems: WD1336+123 and the Sirius-like system WD2129+000. Because the vast majority of WDs have very low polarization degree (<0.5 per cent), they can be used as faint linear polarization standards. Our sample covers SDSS r magnitude range from 13 to 17 and right ascension range from 13h to 24h, with the extension from 1h to 3h.
KW - Polarization
KW - Stars: individual: WD1336+123
KW - Stars: individual: WD1415+234
KW - Stars: individual: WD1619+123
KW - Stars: individual: WD2129+000
KW - White dwarfs
UR - http://www.scopus.com/inward/record.url?scp=85051510006&partnerID=8YFLogxK
U2 - 10.1093/mnras/sty1745
DO - 10.1093/mnras/sty1745
M3 - Article
AN - SCOPUS:85051510006
VL - 479
SP - 5312
EP - 5324
JO - Monthly Notices of the Royal Astronomical Society
JF - Monthly Notices of the Royal Astronomical Society
SN - 0035-8711
IS - 4
ER -
ID: 42200063