2021MNRAS.506L..29S

Query : 2021MNRAS.506L..29S

2021MNRAS.506L..29S - Mon. Not. R. Astron. Soc., 506, L29-L34 (2021/September-1)

Magnetic dynamos in white dwarfs - II. Relating magnetism and pollution.

SCHREIBER M.R., BELLONI D., GANSICKE B.T. and PARSONS S.G.

Abstract (from CDS):

We investigate whether the recently suggested rotation and crystallization driven dynamo can explain the apparent increase of magnetism in old metal polluted white dwarfs. We find that the effective temperature distribution of polluted magnetic white dwarfs is in agreement with most/all of them having a crystallizing core, and increased rotational velocities are expected due to accretion of planetary material that is evidenced by the metal absorption lines. We conclude that a rotation and crystallization driven dynamo offers not only an explanation for the different occurrence rates of strongly magnetic white dwarfs in close binaries but also for the high incidence of weaker magnetic fields in old metal polluted white dwarfs.

Abstract Copyright: © 2021 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society

Journal keyword(s): magnetic fields - white dwarfs - planetary systems

Simbad objects: 37

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Number of rows : 37
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 SDSS J003708.42-052532.8 WD* 00 37 08.4228885504 -05 25 32.802260844           DZH 6 0
2 LSPM J0107+2650 WD* 01 07 28.6153000416 +26 50 21.295268052   19.6   18.5   DZ 15 0
3 SDSS J015748.15+003315.2 WD* 01 57 48.1464846312 +00 33 15.140599164           DZP 17 0
4 SDSS J020018.74+164630.9 WD* 02 00 18.7420494624 +16 46 31.552135032           DZ 3 0
5 LP 649-83 WD* 02 17 19.7317803263 -06 56 28.762501130     17.89     DAZ 19 0
6 LP 887-66 WD* 03 17 12.0974045670 -29 11 34.212635877   17.6 17.49     DAZ 28 0
7 EGGR 566 WD* 03 25 11.0474878302 -01 49 15.047041848   16.8 16.22     DZA9 89 0
8 SDSS J073549.19+205720.9 WD* 07 35 49.1956303920 +20 57 20.990040624           DZP 7 0
9 SDSS J080643.94+405837.7 WD* 08 06 43.9497888648 +40 58 38.238726576           DZ 15 0
10 SCR J0818-3110 WD* 08 18 40.2607671929 -31 10 20.327207159   16.1   15.1 14.9 DZ 37 0
11 SDSS J083200.39+410937.9 WD* 08 32 00.3844224168 +41 09 38.079980676           DZP 6 0
12 SDSS J090222.98+362539.6 WD* 09 02 22.9913029872 +36 25 39.678076812           DZP 4 0
13 SDSS J092713.34+493109.0 WD* 09 27 13.3542277944 +49 31 09.212538684           DZ 3 0
14 SDSS J100346.66-003123.1 WD* 10 03 46.6494708816 -00 31 23.184975468           DZP 7 0
15 WT 1759 WD* 10 12 01.8720031423 -18 43 33.272144578     15.446 15.55 14.92 DZ7 45 1
16 SDSS J110513.63+500652.5 WD* 11 05 13.6322050752 +50 06 52.478159976           DZAP 7 0
17 SDSS J110644.27+673708.6 WD* 11 06 44.2691715504 +67 37 08.398812504           DZH 8 0
18 SDSS J111330.27+275131.4 WD* 11 13 30.2719543704 +27 51 31.398981408           DZ 5 0
19 SDSS J115029.53+453314.0 WD* 11 50 29.52984 +45 33 14.0580           DZ 3 0
20 SDSS J115224.51+160546.7 WD* 11 52 24.5044149840 +16 05 46.805925768           DZP 9 0
21 LP 614-59 WD* 12 14 56.3828498044 -02 34 02.838235659   17.7 17.85     DZP 49 0
22 SDSS J124937.50+651407.6 WD* 12 49 37.5265118352 +65 14 07.511859204           DZ 7 0
23 G 165-7 WD* 13 30 59.4185829051 +30 29 53.651822645   16.73 16.04 15.74 15.60 DZ7 84 0
24 SDSS J141211.53+283618.7 WD* 14 12 11.5241348712 +28 36 18.983716344           DZ 5 0
25 LP 8-181 WD* 15 15 34.8009891072 +82 30 28.981876896   19.4   17.6   DZH 13 0
26 G 137-24 WD* 15 35 05.8098944592 +12 47 45.199307508   15.31   15.7   DZ 55 0
27 SDSS J153642.53+420519.2 WD* 15 36 42.5311880616 +42 05 19.182564996           DZP 8 0
28 SDSS J154625.33+300946.2 WD* 15 46 25.3451203752 +30 09 46.259533512           DZ 12 0
29 SDSS J165101.72+424955.5 WD* 16 51 01.7300636784 +42 49 55.554996360           DZ 12 0
30 LP 276-33 WD* 16 54 45.6926039157 +38 29 36.628370427   17.1 15.86 16.5   DZA 63 0
31 LP 141-14 WD* 18 57 39.3436703328 +53 30 33.301040904   17.6   16.4   DC 82 0
32 LAWD 83 WD* 21 13 16.8549349741 -81 49 12.878285501 13.28 13.82 13.59 13.6   DA4.8 125 0
33 L 570-26 WD* 21 41 57.5651598552 -33 00 29.801367360     14.47 14.30 14.16 DZ7 45 0
34 LP 460-27 WD* 22 27 40.3575893352 +17 53 21.359666400   16.8 15.84 16.0   DAZ 25 0
35 SDSS J225448.83+303107.1 WD* 22 54 48.8122637808 +30 31 07.660023852           DZH 7 0
36 SDSS J232538.93+044813.1 WD* 23 25 38.9440458696 +04 48 13.385661156           DZP 8 0
37 SDSS J233054.31+280517.4 WD* 23 30 54.2781399096 +28 05 17.567908908           DZ 9 0

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