2023MNRAS.520.6135H

Query : 2023MNRAS.520.6135H

2023MNRAS.520.6135H - Mon. Not. R. Astron. Soc., 520, 6135-6158 (2023/April-3)

Spectrophotometric analysis of magnetic white dwarf - II. Helium-rich compositions.

HARDY F., DUFOUR P. and JORDAN S.

Abstract (from CDS):

We present an analysis of all single white dwarf stars known to exhibit spectroscopic signatures of neutral helium line splitting due to the presence of a strong magnetic field. Using state-of-the-art models taking into account the effects of magnetic fields on the synthetic spectra, we determine effective temperatures, surface gravities, and masses for the stars in our sample. Our analysis uses data from the second and third Gaia (early) data releases, photometric data from diverse surveys such as the Sloan Digital Sky Survey and Pan-STARRS, and archived spectroscopic data. We are able to successfully reproduce the spectra of eight objects using an offset dipole geometry while several others seem to require either a more complex geometry or a different chemical composition. We also highlight a group of hot featureless white dwarfs that are most probably highly magnetic objects whose spectra are completely smeared due to the field strength distribution across the surface.

Journal keyword(s): techniques: photometric - techniques: spectroscopic - stars: magnetic fields - white dwarfs

Simbad objects: 85

Full paper

View the references in ADS

Number of rows : 85

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	PB 5847	WD*	00 17 42.4421580744	+00 41 37.359425184		17				DBH	20	0
2	SDSS J002128.59+150223.8	WD*	00 21 28.5971487288	+15 02 23.906004396						DAP	23	0
3	MCT 0026-2150	WD*	00 29 26.1566496072	-21 33 41.746202028		16.587	16.003	15.739		DBH	12	0
4	Feige 7	WD*	00 43 45.9806246832	-10 00 25.016051736		14.49				DBAP3	114	0
5	SDSS J011919.89+301419.6	WD*	01 19 19.8734619840	+30 14 19.858884180						DBH:	4	0
6	GALEX J012118.4+384606	WD*	01 21 18.4053127440	+38 46 06.887697636						DBH:	7	0
7	SDSS J012426.34+400357.4	WD*	01 24 26.3303681232	+40 03 57.425581404						DBH:	6	0
8	GD 1363	WD*	01 29 56.1194726184	-30 55 09.826605372		15.13	14.51			DB	32	0
9	GALEX J014245.3+131546	WD*	01 42 45.3733239768	+13 15 46.381990824						DBH	20	0
10	PB 6723	**	02 11 16.3584664968	+00 31 28.267621536		18				DAH:+M	19	0
11	SDSS J021148.22+211548.2	WD*	02 11 48.1781405904	+21 15 48.425363316						DAP	23	0
12	PB 6737	WD*	02 12 05.3149744992	+06 44 20.267785860		18				DBH:	16	0
13	GALEX J025150.4+351549	**	02 51 50.4011103672	+35 15 48.326918040						DBH+M:	5	0
14	SDSS J030502.28+374747.2	WD*	03 05 02.2811184000	+37 47 47.231240676						DBH:	7	0
15	HE 0330-0002	WD*	03 33 20.3685575184	+00 07 20.656091172		16.8				DBH	36	0
16	GALEX J034308.1-064126	WD*	03 43 08.1781876848	-06 41 27.340079424						DAH	13	0
17	SDSS J054326.73+834056.2	**	05 43 26.7747041040	+83 40 56.162185824						DBH+M:	5	0
18	GALEX J072453.5+364011	WD*	07 24 53.5763476272	+36 40 10.567092720						DBH	3	0
19	SDSS J073249.55+164205.5	WD*	07 32 49.5446562000	+16 42 05.573593044						DAH	2	0
20	NGC 2422	OpC	07 36 35.8	-14 30 15						~	275	0
21	GALEX J073647.1+671240	WD*	07 36 47.2308360648	+67 12 40.509544536						DBH	6	0
22	SDSS J074213.39+315703.7	WD*	07 42 13.3964861904	+31 57 03.892318236						DAH	20	0
23	SDSS J080042.47+065542.1	WD*	08 00 42.4942352256	+06 55 42.087227088						DAH	15	0
24	GALEX J082247.5+120147	WD*	08 22 47.6087586960	+12 01 46.849506420						DAH:	16	1
25	GALEX J083047.2+505734	WD*	08 30 47.2182131352	+50 57 34.235360136						DAH	8	0
26	GALEX J083627.3+154849	WD*	08 36 27.3483252552	+15 48 50.320827504						DAH	6	0
27	GALEX J083754.8+533240	WD*	08 37 54.8262766032	+53 32 40.249285008						DBH	6	0
28	GALEX J084040.4+551114	WD*	08 40 40.4306523600	+55 11 13.328747808						DBH:	7	0
29	GALEX J084215.0-022225	WD*	08 42 15.0214428600	-02 22 26.793009048		15.99	15.95		16.29	DAH?DBH?	17	0
30	GALEX J084404.5+312924	WD*	08 44 04.5179157648	+31 29 23.907755040		18.4		19.2		DBH	5	0
31	GALEX J084716.2+484220	WD*	08 47 16.2169202760	+48 42 20.315586600						DBH:	23	0
32	GALEX J084929.1+285720	WD*	08 49 29.1191047008	+28 57 20.317304736						DAH	7	0
33	PG 0850+192	HS*	08 53 41.3763185208	+19 01 41.955211272		16.113	16.231			sdOA	21	1
34	EGGR 904	WD*	08 56 18.9476777928	+16 11 03.744751560		15.544	15.595	15.885		DB2	65	1
35	GALEX J085649.6+253440	WD*	08 56 49.6874409384	+25 34 41.171231604		17.0		17.3		DAH	20	0
36	GALEX J091004.7+394153	WD*	09 10 04.6704006672	+39 41 53.444979528						DBH	6	0
37	PM J09249+3613	WD*	09 24 55.6551221808	+36 13 08.350297284						DAH	2	0
38	US 736	WD*	09 35 02.0161865928	+44 29 40.899623172						DAH:	15	0
39	GALEX J093832.8+474050	WD*	09 38 32.7948401280	+47 40 50.659799988						DBH:	10	0
40	GALEX J094209.4+540157	WD*	09 42 09.4839446616	+54 01 57.345970584						DBH	6	0
41	GALEX J103517.8+273935	WD*	10 35 17.8530938160	+27 39 34.281583884		18.0		18.6		DBH:	12	0
42	HE 1043-0502	WD*	10 46 09.7940409360	-05 18 15.784921800		17.4		16.7		DBH	22	0
43	SDSS J112148.80+103934.2	WD*	11 21 48.8081868480	+10 39 34.329715416						DAH	12	0
44	GALEX J114246.5+205221	WD*	11 42 46.5263885520	+20 52 21.783977796						DBH:	6	0
45	GALEX J114439.4+662928	WD*	11 44 39.5477364048	+66 29 28.548282552						DAH	13	0
46	2QZ J115305.7+005646	WD*	11 53 05.5408229376	+00 56 46.145922756		18.86				DQ	32	0
47	SDSS J115345.97+133106.6	WD*	11 53 45.9784005816	+13 31 06.603958560						DAH	6	0
48	CBS 49	WD*	11 55 03.6467741232	+31 48 25.692056064		17				DB	21	0
49	GALEX J120224.4+403455	WD*	12 02 24.3830761728	+40 34 55.780897872						DA	5	0
50	HE 1211-1707	WD*	12 14 08.2705541328	-17 24 40.910608260		16.8	16.77	17.2		DXH2.2	33	1
51	GALEX J125727.0+121613	WD*	12 57 26.9515357752	+12 16 13.439567244						DAH:	3	0
52	EGGR 436	WD*	13 08 41.1944602216	+85 02 28.161666517		16.76		15.9		DA9P	61	0
53	SDSS J131717.75+391719.6	WD*	13 17 17.7449979864	+39 17 19.499166348						DBH:	5	0
54	SDSS J132858.19+590851.0	WD*	13 28 58.2162380184	+59 08 51.112696920						DQAP	24	0
55	HE 1338-2204	WD*	13 41 17.2891130472	-22 19 44.179802328		17.0	16.38	16.5		DBA	12	1
56	SDSS J134845.98+110008.8	WD*	13 48 46.0008292320	+11 00 08.727370380						DAH:	12	0
57	GALEX J134913.5+205646	WD*	13 49 13.5428447712	+20 56 46.987537956		18.5	19.22	18.8		DAH	13	1
58	GALEX J140750.6+301130	WD*	14 07 50.6633259864	+30 11 30.423970284						DAH	14	0
59	GALEX J142810.1+103954	WD*	14 28 10.1187896616	+10 39 53.712677484						DBH	12	0
60	GALEX J143739.0+315247	WD*	14 37 39.1323384240	+31 52 48.859953456						DBH	5	0
61	GALEX J145301.6+065220	WD*	14 53 01.6132593528	+06 52 21.049364460						DQ	10	0
62	GALEX J145558.4+181252	WD*	14 55 58.3939730928	+18 12 52.339038228						DC	9	0
63	GALEX J153224.3+491453	WD*	15 32 24.2377800336	+49 14 54.270623184		18.1		18.9		DB	14	0
64	LSPM J1532+1647	WD*	15 32 55.0670127840	+16 47 36.046341744						DAH:	5	0
65	GALEX J153725.5+233719	WD*	15 37 25.5066595920	+23 37 19.436475324						DBH:	11	0
66	GALEX J160319.4+524935	WD*	16 03 19.3774174104	+52 49 35.887861092						DBH	6	0
67	GALEX J161159.8+092134	WD*	16 11 59.8148812728	+09 21 34.033305348						DBH	5	0
68	GALEX J161643.7+171453	WD*	16 16 43.6575236256	+17 14 53.469460968						DBH:	11	0
69	GALEX J162303.2+354641	WD*	16 23 03.1829980008	+35 46 41.025878472						DAH	2	0
70	SDSS J162352.60+065056.8	WD*	16 23 52.6031690472	+06 50 56.778365184						DAH	3	0
71	GD 356	WD*	16 40 57.1485192288	+53 41 09.317032080		15.39		15.1		DAEH6.5	133	0
72	GD 358	WD*	16 47 18.3925183824	+32 28 32.862804384	12.511	13.530	13.653	13.752	13.852	DB2	364	0
73	GALEX J170359.9+321328	WD*	17 04 00.0078700128	+32 13 28.576663428						DAP	12	0
74	GALEX J172432.1+323414	WD*	17 24 32.1450729672	+32 34 14.893412484		17.9		18.7		DAH	13	0
75	GALEX J173232.1+335610	WD*	17 32 32.0892400152	+33 56 10.345978320						DBH:	7	0
76	SDSS J184926.23+645811.1	WD*	18 49 26.2088167056	+64 58 10.970694876						DBH?DAH?	14	0
77	LAWD 73	WD*	19 00 10.2533239461	+70 39 51.416733790		13.24		13.5		DAP4.5	264	0
78	GD 229	WD*	20 12 22.2670866408	+31 13 48.884861856	13.62	14.77	14.85			DXP2	143	0
79	GALEX J212656.7-002423	WD*	21 26 56.7138593952	-00 24 23.938903152						DBH:	12	0
80	GALEX J215135.0+003140	WD*	21 51 35.0086496808	+00 31 40.590302880						DC	18	0
81	SDSS J221150.49+222139.6	WD*	22 11 50.4911280120	+22 21 39.668017536						DBH:	9	0
82	GALEX J224741.4+145638	WD*	22 47 41.4582880872	+14 56 38.845368420		17.6		17.4		DAH	27	1
83	GALEX J225828.5+280828	WD*	22 58 28.4826217968	+28 08 28.568379876						DAH:	9	0
84	PHL 493	WD*	23 23 37.5548711496	-00 46 28.300198584		18.3	18.5			DBH	16	0
85	GALEX J234605.4+385337	WD*	23 46 05.4459725712	+38 53 37.729755528						DAP	16	0

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