2019MNRAS.485.5050H

Query : 2019MNRAS.485.5050H

2019MNRAS.485.5050H - Mon. Not. R. Astron. Soc., 485, 5050-5058 (2019/June-1)

Constraining the magnetic field on white dwarf surfaces: Zeeman effects and fine structure constant variation.

HU J., WEBB J.K., AYRES T.R., BAINBRIDGE M.B., BARROW J.D., BARSTOW M.A., BERENGUT J.C., CARSWELL R.F., DZUBA V.A., FLAMBAUM V.V., HOLBERG J.B., LEE C.C., PREVAL S.P., REINDL N. and TCHANG-BRILLET W.-U.L.

Abstract (from CDS):

White dwarf (WD) atmospheres are subjected to gravitational potentials around 105 times larger than occur on Earth. They provide a unique environment in which to search for any possible variation in fundamental physics in the presence of strong gravitational fields. However, a sufficiently strong magnetic field will alter absorption line profiles and introduce additional uncertainties in measurements of the fine structure constant. Estimating the magnetic field strength is thus essential in this context. Here, we model the absorption profiles of a large number of atomic transitions in the WD photosphere, including first-order Zeeman effects in the line profiles, varying the magnetic field as a free parameter. We apply the method to a high signal-to-noise, high-resolution, far-ultraviolet Hubble Space Telescope/Space Telescope Imaging Spectrograph spectrum of the WD G191-B2B. The method yields a sensitive upper limit on its magnetic field of B < 2300 G at the 3σ level. Using this upper limit, we find that the potential impact of quadratic Zeeman shifts on measurements of the fine structure constant in G191-B2B is 4 orders of magnitude below laboratory wavelength uncertainties.

Abstract Copyright: © 2019 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): atomic processes - line: profiles - magnetic fields - white dwarfs

Simbad objects: 1

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Number of rows : 1
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 BD+52 913 WD* 05 05 30.6180977592 +52 49 51.919301604 10.25 11.44 11.69 11.93 12.108 DA.8 1153 0

Query : 2019MNRAS.485.5050H

Basic data :
BD+52 913 -- White Dwarf
Other object types: otypes_help 		* (BD,ALS,...), WD* (2011MNRAS,EGGR,...), UV (2EUVE,EUVE,...), X (RE,RX,...), ** (**,WDS), PM* (2018yCat,G), WD? (2021MNRAS), V* (1SWASP), blu (FB), NIR (2MASS)
ICRS coord. (ep=J2000) : 		05 05 30.6180977592 +52 49 51.919301604 (Optical) [ 0.0464 0.0344 90 ] A 2020yCat.1350....0G
FK4 coord. (ep=B1950 eq=1950) : 		05 01 31.4599378740 +52 45 52.153092823 [ 0.0464 0.0344 90 ]
Gal coord. (ep=J2000) : 		155.9533360467119 +07.0990579387506 [ 0.0464 0.0344 90 ]
Proper motions mas/yr : 		12.701 -93.416 [0.080 0.060 90] A 2020yCat.1350....0G
Radial velocity / Redshift / cz : 		V(km/s) 69.00 [~] / z(~) 0.000230 [~] / cz 69.01 [~]
   D 1994A&AS..108..603B
Parallaxes (mas): 		19.0497 [0.0561] A 2020yCat.1350....0G
Spectral type: 		DA.8 C 2011ApJ...743..138G
Fluxes (9) :
U 10.25 [~] D 2007AJ....133..768L
B 11.44 [0.08] D 2000A&A...355L..27H
V 11.69 [0.17] D 2000A&A...355L..27H
R 11.93 [~] D 2007AJ....133..768L
G 11.718442 [0.002842] C 2020yCat.1350....0G
I 12.108 [~] D 2007AJ....133..768L
J 12.543 [0.021] C 2003yCat.2246....0C
H 12.669 [0.025] C 2003yCat.2246....0C
K 12.764 [0.023] C 2003yCat.2246....0C
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Identifiers (34) :
An access of full data is available using the icon Vizier near the identifier of the catalogue

BD+52 913 G 191-B2B RE J0505+524 WDS J05055+5249B
** WNO 44B HIC 23692 RX J0505.5+5250 WD 0501+527
ALS 8157 HIP 23692 1RXS J050525.8+524913 WD 0501+524
EGGR 247 LS V +52 21 1SWASP J050530.60+524951.9 [SPB96] 679
2EUVE J0505+52.8 2MASS J05053062+5249519 TIC 327587572 [VKN2011] J050530.7+524950
EUVE J0505+52.8 2RE J0505+524 TYC 3734-2324-1 Gaia DR2 266077145295627520
FB 44 2RE J050530+524941 USNO 122 Gaia DR3 266077145295627520
GCRV 21703 RE J0505+52 uvby98 005200913
G 191-2B RE J050530+524929 VVO 366

References (1153 between 1850 and 2026) (Total 1153)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).
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Collections of Measurements Description of Measurements

Velocities : 1    Distance : 3    Fe/H : 3    Plx : 5    PM : 5    SpT : 5   

   

Observing logs
IUE : 63    XMM : 1   

   

External archives :

Archive data at HEASARC - High-Energy Astrophysics Science Archive Research Center

Data at NED - NASA/IPAC Extragalactic Database : BD+52 913

Link by name to the catalogue in VizieR :

BD+52 913 ALS 8157 EUVE J0505+52.8 G 191-2B HIC 23692
HIP 23692 LS V +52 21 2MASS J05053062+5249519 2RE J0505+524 2RE J050530+524941
1RXS J050525.8+524913 TYC 3734-2324-1 uvby98 005200913 WDS J05055+5249B WD 0501+527
WD 0501+524 Gaia DR2 266077145295627520 Gaia DR3 266077145295627520

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