2021MNRAS.501.2677D

Query : 2021MNRAS.501.2677D

2021MNRAS.501.2677D - Mon. Not. R. Astron. Soc., 501, 2677-2687 (2021/February-3)

New observations of NGC 1624-2 reveal a complex magnetospheric structure and underlying surface magnetic geometry.

DAVID-URAZ A., PETIT V., SHULTZ M.E., FULLERTON A.W., ERBA C., KESZTHELYI Z., SEADROW S. and WADE G.A.

Abstract (from CDS):

NGC 1624-2 is the most strongly magnetized O-type star known. Previous spectroscopic observations of this object in the ultraviolet provided evidence that it hosts a large and dense circumstellar magnetosphere. Follow-up observations obtained with the Hubble Space Telescope not only confirm that previous inference, but also suggest that NGC 1624-2's magnetosphere has a complex structure. Furthermore, an expanded spectropolarimetric time series shows a potential departure from a dipolar magnetic field geometry, which could mean that the strongest field detected at the surface of an O-type star is also topologically complex. This result raises important questions regarding the origin and evolution of magnetic fields in massive stars.

Abstract Copyright: © 2020 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society

Journal keyword(s): techniques: polarimetric - stars: early-type - stars: individual: NGC 1624-2 - stars: magnetic field - stars: winds, outflows - ultraviolet: stars

Simbad objects: 6

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Number of rows : 6
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 HD 108 SB* 00 06 03.3890541936 +63 40 46.771220928 6.79 7.58 7.40     O4-8f?p 338 0
2 NGC 1624 OpC 04 40 36.0 +50 27 42     11.8     ~ 79 1
3 NGC 1624 2 * 04 40 37.2758720568 +50 27 41.040508572 11.9 12.47 11.57     O7f?cp 62 0
4 * zet Ori A SB* 05 40 45.527143 -01 56 33.26036   1.79 1.90     O9.2IbvarNwk 680 0
5 HD 47129 SB* 06 37 24.0420854544 +06 08 07.369104444 5.23 6.11 6.06     O8I+O7.5III 420 0
6 HD 191612 SB* 20 09 28.6105997664 +35 44 01.286453904 7.40 8.07 7.80     O8fpe 250 0

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