2017MNRAS.465.1008V

Query : 2017MNRAS.465.1008V

2017MNRAS.465.1008V - Mon. Not. R. Astron. Soc., 465, 1008-1022 (2017/February-2)

Explaining the variability of WD 1145+017 with simulations of asteroid tidal disruption.

VERAS D., CARTER P.J., LEINHARDT Z.M. and GANSICKE B.T.

Abstract (from CDS):

Post-main-sequence planetary science has been galvanized by the striking variability, depth and shape of the photometric transit curves due to objects orbiting white dwarf WD 1145+017, a star which also hosts a dusty debris disc and circumstellar gas, and displays strong metal atmospheric pollution. However, the physical properties of the likely asteroid which is discharging disintegrating fragments remain largely unconstrained from the observations. This process has not yet been modelled numerically. Here, we use the N-body code PKDGRAV to compute dissipation properties for asteroids of different spins, densities, masses and eccentricities. We simulate both homogeneous and differentiated asteroids, for up to 2 yr, and find that the disruption time-scale is strongly dependent on density and eccentricity, but weakly dependent on mass and spin. We find that primarily rocky differentiated bodies with moderate (∼3-4 g cm–3) bulk densities on near-circular (e <= 0.1) orbits can remain intact while occasionally shedding mass from their mantles. These results suggest that the asteroid orbiting WD 1145+017 is differentiated, resides just outside of the Roche radius for bulk density but just inside the Roche radius for mantle density, and is more akin physically to an asteroid like Vesta instead of one like Itokawa.

Abstract Copyright: © 2016 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): methods: numerical - minor planets, asteroids: general - planets and satellites: dynamical evolution and stability - planets and satellites: physical evolution - planets and satellites: rings - white dwarfs - white dwarfs

Status at CDS : Large table(s) will be appraised for possible ingestion in VizieR.

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 LBQS 1145+0145 WD* 11 48 33.6297189672 +01 28 59.420446860           DB 216 0

Query : 2017MNRAS.465.1008V

Basic data :
LBQS 1145+0145 -- White Dwarf
Other object types: otypes_help 		* (1992ApJS,EPIC,...), WD* (1992ApJS,WD), WD? (2018MNRAS), QSO (LBQS), EB* (2016AJ), Opt (SDSS)
ICRS coord. (ep=J2000) : 		11 48 33.6297189672 +01 28 59.420446860 (Optical) [ 0.0754 0.0600 90 ] A 2020yCat.1350....0G
FK4 coord. (ep=B1950 eq=1950) : 		11 45 59.9170490692 +01 45 40.291033773 [ 0.0754 0.0600 90 ]
Gal coord. (ep=J2000) : 		269.8500485730851 +60.2522309712248 [ 0.0754 0.0600 90 ]
Proper motions mas/yr : 		-43.664 -4.027 [0.105 0.075 90] A 2020yCat.1350....0G
Parallaxes (mas): 		6.8534 [0.0907] A 2020yCat.1350....0G
Spectral type: 		DB D 1992ApJS...78..409B
Fluxes (6) :
G 17.145735 [0.003365] C 2020yCat.1350....0G
u (AB) 16.832 [0.007] C 2008ApJS..175..297A
g (AB) 16.985 [0.004] C 2008ApJS..175..297A
r (AB) 17.288 [0.005] C 2008ApJS..175..297A
i (AB) 17.559 [0.007] C 2008ApJS..175..297A
z (AB) 17.822 [0.023] C 2008ApJS..175..297A
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Identifiers (7) :
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WD 1145+017 HE 1145+0145 SDSS J114833.62+012859.4 Gaia DR3 3796414192429498880
EPIC 201563164 LBQS 1145+0145 Gaia DR2 3796414192429498880

References (216 between 1850 and 2026) (Total 216)
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

Distance : 2    Var : 1    Fe/H : 3    Plx : 2    PM : 3    SpT : 3   

   

External archives :

Data at NED - NASA/IPAC Extragalactic Database : LBQS 1145+0145

Link by name to the catalogue in VizieR :

WD 1145+017 LBQS 1145+0145 SDSS J114833.62+012859.4 Gaia DR2 3796414192429498880 Gaia DR3 3796414192429498880

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