2008CoAst.154...16B

Query : 2008CoAst.154...16B

2008CoAst.154...16B - Com. in Asteroseismology, 154, 16-23 (2008/June-0)

Preliminary asteroseismology of EC20058-5234 and limits on plasmon neutrinos.

BISCHOFF-KIM A.

Abstract (from CDS):

We present results from a preliminary asteroseismological analysis of the hot DBV EC20058-5234 based on an extensive grid of models. EC20058 is the only known stable DBV and also the hottest and provides an ideal laboratory to constrain the emission rate of plasmon neutrinos. In a Whole Earth Telescope (WET) campaign in 1997, Sullivan et al.~(2008) have found 11 independent modes. We use the results of their work to perform a 6 parameter fit of the observed period spectrum. We find a best fit model consistent with the spectroscopically determined effective temperature and surface gravity for EC20058. We find that the periods can be fit successfully without invoking an uneven split of the 281s mode due to a magnetic field. Based on our best fit model, we compute rates of change for the two stable modes observed in the star, which in turn can be used to place tight constraints on plasmon neutrino emission.

Abstract Copyright: ∼

Journal keyword(s):

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* QU Tel	WD*	20 09 40.1871967824	-52 25 15.864452508	14.51	15.25	15.03			DB2	60	1

Query : 2008CoAst.154...16B

Basic data :

V* QU Tel -- White Dwarf

WD* (1999ApJ,WD), WD? (2018MNRAS), * (2013MNRAS,Gaia), PM* (2012yCat), Pu* (2008MNRAS), V* (V*), UV (GALEX)

20 09 40.1871967824 -52 25 15.864452508 (Optical) [ 0.0351 0.0294 90 ] A 2020yCat.1350....0G

20 05 52.4500951515 -52 34 02.390537328 [ 0.0351 0.0294 90 ]

346.1189250574413 -32.8928016586257 [ 0.0351 0.0294 90 ]

12.271 -76.758 [0.049 0.041 90] A 2020yCat.1350....0G

8.4399 [0.0466] A 2020yCat.1350....0G

DB2 C 1999ApJ...516..887B

U 14.51 [~] D 2013MNRAS.431..240O

B 15.25 [~] D 2013MNRAS.431..240O

V 15.03 [~] D 2013MNRAS.431..240O

G 15.756301 [0.002932] C 2020yCat.1350....0G

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`WD 2005-525`	`GALEX J200940.2-522516`	*`V QU Tel`**	`Gaia DR3 6665910709364014336`
`EC 20058-5234`	`TIC 1990094034`	`Gaia DR2 6665910709364014336`

References (60 between 1850 and 2026) (Total 60)
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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WD 2005-525 GALEX J200940.2-522516 V* QU Tel Gaia DR2 6665910709364014336 Gaia DR3 6665910709364014336

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