2018MNRAS.478L..78P

Query : 2018MNRAS.478L..78P

2018MNRAS.478L..78P - Mon. Not. R. Astron. Soc., 478, L78-L82 (2018/July-3)

A reevaluation of the proposed spin-down of the white dwarf pulsar in AR Scorpii.

POTTER S.B. and BUCKLEY D.A.H.

Abstract (from CDS):

We present high-speed optical photometric observations, spanning ∼2 yr, of the recently discovered white dwarf pulsar AR Scorpii. The amplitudes of the orbital, spin, and beat modulations appear to be remarkably stable and repeatable over the time span of our observations. It has been suggested that the polarized and non-polarized emission from AR Scorpii is powered by the spin-down of the white dwarf. However, we find that our new data are inconsistent with the published spin-down ephemeris. Whilst our data are consistent with a constant spin period, further observations over an extended time-base are required in order to ascertain the true spin-evolution of the white dwarf. This may have implications for the various models put forward to explain the energetics and evolution of AR Scorpii.

Journal keyword(s): stars: individual: AR Sco - stars: magnetic field - pulsars: general - 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	V* AR Sco	EB*	16 21 47.2831986456	-22 53 10.385689092		14.94	14.75			M5+D?	141	0

Query : 2018MNRAS.478L..78P

Basic data :

V* AR Sco -- Eclipsing Binary

* (EPIC,SOPS,...), EB* (2016Natur), V* (AN,V*), dS* (2003AstL), Psr (2017NatAs), WD? (2016Natur), PM* (2018yCat), NIR (2MASS), MIR (SSTc2d)

16 21 47.2831986456 -22 53 10.385689092 (Optical) [ 0.0331 0.0210 90 ] A 2020yCat.1350....0G

16 18 47.9651829570 -22 46 05.334886423 [ 0.0331 0.0210 90 ]

353.5192293487943 +18.7120709912035 [ 0.0331 0.0210 90 ]

9.690 -51.489 [0.047 0.038 90] A 2020yCat.1350....0G

8.5437 [0.0376] A 2020yCat.1350....0G

M5+D? D 2016Natur.537..374M

B 14.94 [0.04] E 2012yCat.1322....0Z

V 14.75 [~] D 2017MNRAS.469.3688D

G 14.989848 [0.031394] C 2020yCat.1350....0G

J 12.696 [0.027] C 2003yCat.2246....0C

H 12.080 [0.024] C 2003yCat.2246....0C

K 11.715 [0.024] C 2003yCat.2246....0C

g 14.81 [0.01] E 2012yCat.1322....0Z

r 14.37 [0.01] E 2012yCat.1322....0Z

i 14.28 [0.01] E 2012yCat.1322....0Z

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*`SV HV 1064`**	`EPIC 204298485`	`SSTc2d J162147.3-225310`	*`V AR Sco`**
`AN 216.1904`	`2MASS J16214728-2253102`	`TIC 50098516`	`Gaia DR3 6050296829033196032`
`CRTS J162147.3-225310`	`SOPS IV g-2`	`UCAC4 336-082331`	`Gaia DR2 6050296829033196032`

References (141 between 1850 and 2026) (Total 141)
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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2MASS J16214728-2253102 UCAC4 336-082331 V* AR Sco Gaia DR3 6050296829033196032 Gaia DR2 6050296829033196032

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