1999ApJ...522..973C

Query : 1999ApJ...522..973C

1999ApJ...522..973C - Astrophys. J., 522, 973-982 (1999/September-2)

Direct measurement of a secular pulsation period change in the pulsating hot pre-white dwarf PG 1159-035.

COSTA J.E.S., KEPLER S.O. and WINGET D.E.

Abstract (from CDS):

GW Vir (PG 1159-035) is the prototype of the class of multiperiodic, nonradially pulsating hot white dwarfs, and shows a strong pulsation mode at 516 s. All measurements to date of the secular variation of the 516 s pulsation quote as best value P{dot}=(-2.49±0.06)x10–11 s.s–1. The original measurement gave two best solutions, and a χ2 analysis indicated that the quoted value was preferred at the level of 0.97 probability. On other hand, the best-developed models for planetary nebula nuclei (PNNs), using models from the asymptotic giant branch as starting points and simulating the observed mass loss, provide positive values for any model with log(L/L☉)≲3, as PG 1159-035. This conflict between the measurement and the theoretical models has been a challenge to stellar evolution theory.

Exploiting a much larger data set and computational techniques previously unavailable, we show that the earlier analysis of the data grossly underestimated the true uncertainties due to interferences between frequencies. Using new data along with the old, and more accurate statistical methods, we calculated the secular period change of the 516 s pulsation, and obtained a positive value: P{dot}=(+13.07±0.03)x10–11 s.s–1. We show that three additional methods yield the same solution. This new value was the second best of the original possible solutions; it was eliminated on the basis of statistical arguments that we show to be invalid. It is an order of magnitude larger than the theoretical predictions.

Additionally, from rotational splitting analysis, we were able to estimate, for the first time, a limit to the secular variation of the rotational period P{dot}rot=(-1.0±3.5)x10–11 s.s–1, leading to a contraction timescale upper limit of |τ–1R|=|R{dot}/R|<48x10–11 s–1 with 99.5% probability.


Abstract Copyright: ∼

Journal keyword(s): Stars: Evolution - stars: individual (PG 1159-035) - Stars: Oscillations - Stars: 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* GW Vir WD* 12 01 45.9731868264 -03 45 40.628670300   14.87 15.04     DOQZ1 505 0

Query : 1999ApJ...522..973C

Basic data :
V* GW Vir -- White Dwarf
Other object types: otypes_help 		X (2E,RE,...), UV (2EUVE,EUVE,...), WD* (1986ApJS,WD), V* (1SWASP,V*), * (EPIC,Gaia), blu (2019A&A), WD? (2021MNRAS), HS? (2019A&A), Pu* (2017ARep), NIR (2MASS)
ICRS coord. (ep=J2000) : 		12 01 45.9731868264 -03 45 40.628670300 (Optical) [ 0.0534 0.0329 90 ] A 2020yCat.1350....0G
FK4 coord. (ep=B1950 eq=1950) : 		11 59 12.2581881567 -03 28 58.226578051 [ 0.0534 0.0329 90 ]
Gal coord. (ep=J2000) : 		279.8183374518325 +56.8647195629191 [ 0.0534 0.0329 90 ]
Proper motions mas/yr : 		-14.495 -3.207 [0.061 0.035 90] A 2020yCat.1350....0G
Parallaxes (mas): 		1.6905 [0.0642] A 2020yCat.1350....0G
Spectral type: 		DOQZ1 C 1993PASP..105..761W
Fluxes (6) :
B 14.87 [~] E ~
V 15.04 [~] D 2011MNRAS.410..899F
G 14.693249 [0.002931] C 2020yCat.1350....0G
J 15.620 [0.059] C 2003yCat.2246....0C
H 15.872 [0.135] D 2003yCat.2246....0C
K 15.733 [0.229] D 2003yCat.2246....0C
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Identifiers (27) :
An access of full data is available using the icon Vizier near the identifier of the catalogue

WD 1159-034 2MASS J12014597-0345405 2RE J1201-034 TIC 35062562
2E 2572 NAME PG 1159 RE J120143-034549 V* GW Vir
2E 1159.2-0328 PG 1159-036 RE J1201-034 WD 1159-035
EPIC 201214472 PG 1159-034 2RXP J120146.4-034536 [TSA98] J120146.63-034526.25
2EUVE J1201-03.7 PG 1159-035 RX J1201.7-0345 Gaia DR3 3600841623951744640
EUVE J1201-03.7 PG 1159-03 1RXS J120145.7-034532 Gaia DR2 3600841623951744640
GALEX J120145.9-034539 2RE J120142-034542 1SWASP J120145.98-034540.6

References (505 between 1850 and 2026) (Total 505)
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    Plx : 2    PM : 2    SpT : 2   

   

Observing logs
IUE : 21   

   

External archives :

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

Data at NED - NASA/IPAC Extragalactic Database : V* GW Vir

Link by name to the catalogue in VizieR :

WD 1159-034 2E 2572 EUVE J1201-03.7 GALEX J120145.9-034539 2MASS J12014597-0345405
PG 1159-036 PG 1159-034 PG 1159-035 PG 1159-03 2RE J120142-034542
2RE J1201-034 1RXS J120145.7-034532 V* GW Vir WD 1159-035 Gaia DR3 3600841623951744640
Gaia DR2 3600841623951744640

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