2020MNRAS.491.1057C

Query : 2020MNRAS.491.1057C

2020MNRAS.491.1057C - Mon. Not. R. Astron. Soc., 491, 1057-1063 (2020/January-1)

Light-curve variation caused by accretion column switching stellar hemispheres.

CEMELJIC M. and SIWAK M.

Abstract (from CDS):

We investigate switching of the accretion column between the stellar hemispheres in the magnetosphere of a star with the dipole magnetic field aligned with the stellar rotation axis. We show that such switching can produce 'hiccups' in the observed light curves. The intensity of emitted radiation from the stellar surface as seen by distant observers is computed from our two-dimensional axisymmetric viscous and resistive magnetohydrodynamic numerical simulations. This result is used to construct a three-dimensional model of a star with the ring-shaped hotspots from the accretion columns at the stellar surface. We compute the intensity from such hotspots. To obtain a non-axisymmetric model with arc-shaped hotspots, we remove a ring section in the azimuthal direction from the hotspots and compute the intensity of the radiated emission. Such models can be used to relate physical parameters in the simulations to the observations. We show an example with the intensity computed from our model compared to observational light curve.

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

Journal keyword(s): magnetic fields - MHD - stars: formation

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 V* V1000 Tau Or* 04 42 07.3303627320 +25 23 02.932953612 19.09 16.1 15.01     M2.5 88 0

Query : 2020MNRAS.491.1057C

Basic data :
V* V1000 Tau -- Orion Variable
Other object types: otypes_help 		* (2022AJ,AP,...), X (XEST,[ABG2007],...), MIR (SSTc2d,WISEA,...), Y*O (2010ApJS), ** (**,WDS), TT* (2014ApJ), Or* (2017ARep), Em* (HBC), V* (V*), V*? (SV*), Rad (GBS), UV (XEST), NIR (2MASS), IR (ITG)
ICRS coord. (ep=J2000) : 		04 42 07.3303627320 +25 23 02.932953612 (Optical) [ 2.5207 1.4395 90 ] C 2020yCat.1350....0G
FK4 coord. (ep=B1950 eq=1950) : 		04 39 03.8362620997 +25 17 22.611423046 [ 2.5207 1.4395 90 ]
Gal coord. (ep=J2000) : 		174.6815720088453 -13.5634910699248 [ 2.5207 1.4395 90 ]
Spectral type: 		M2.5 D 2014ApJ...786...97H
Fluxes (7) :
U 19.09 [0.15] D 2007A&A...468..379A
B 16.1 [~] E ~
V 15.01 [~] E ~
G 13.795083 [0.015745] C 2020yCat.1350....0G
J 9.580 [0.023] C 2003yCat.2246....0C
H 8.401 [0.024] C 2003yCat.2246....0C
K 7.945 [0.023] C 2003yCat.2246....0C
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Hierarchy : number of linked objects
whatever the membership probability is (see description here ) :

: 1 : 1943 Display criteria :

Identifiers (26) :
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2MASS J04420732+2523032 HBC 423 V* V1000 Tau [ABG2007] 2134
** HAT 13B ITG 48 WDS J04421+2523B [BCK99] HCl 2 SE-3b
** GHE 15 NAME LkHa 332/G1 WDS J04421+2523Ba,Bb [GBA2007] 2133
AP J04420732+2523032 SSTc2d J044207.3+252303 WISEA J044207.33+252303.0 Gaia DR3 148116177746232192
CoKu LkHA 332 G1 SSTtau 044207.3+252303 WISE J044207.31+252302.8 Gaia DR2 148116177745403776
EPIC 247941613 SV* SVS 2834 XEST 10-OM-003
GBS-VLA J044207.32+252303.0 TIC 150173453 XEST 10-018

References (88 between 1850 and 2026) (Total 88)
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

Var : 2    Rot : 1    Fe/H : 1    SpT : 1   

   

External archives :

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

Link by name to the catalogue in VizieR :

2MASS J04420732+2523032 AP J04420732+2523032 V* V1000 Tau WDS J04421+2523B WDS J04421+2523Ba,Bb
WISEA J044207.33+252303.0 WISE J044207.31+252302.8 Gaia DR3 148116177746232192 Gaia DR2 148116177745403776

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