2022RNAAS...6..107S

Query : 2022RNAAS...6..107S

2022RNAAS...6..107S - Research Notes of the AAS, 6, 107 (2022/May-0)

Discovery of a New Massive ZZ Ceti Star.

SHEPHERD K.G., HALL W. and CASTANHEIRA B.G.

Abstract (from CDS):

Massive pulsating white dwarf stars are extremely rare, because they are the final product of intermediate-mass stars, which are less common than low-mass stars. Additionally, their small size makes them fainter than the normal-mass white dwarf stars (∼0.6 M_⊙). Our motivation to look for this type of variable is to be able to study in detail their internal structure and therefore derive properties for the outcome of the evolution of intermediate mass stars, below 10 M_⊙. Using the 2.1 m Otto Struve Telescope at McDonald Observatory, we report on the discovery of a new massive pulsating white dwarf star. These stars might be massive enough that their cores have a significant crystallized portion, up to about 50%. A detailed asteroseismic study of these stars will provide important constrains on intermediate-mass stellar evolution, and the opportunity to study solid state physics at extreme conditions.

Journal keyword(s): White dwarf stars - Asteroseismology - ZZ Ceti stars - Pulsating variable stars

Simbad objects: 1

Full paper

View the references in ADS

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	GALEX J155438.3+241032	WD*	15 54 38.3611235832	+24 10 32.525178348						DA	13	0

Query : 2022RNAAS...6..107S

Basic data :

GALEX J155438.3+241032 -- White Dwarf

WD* (2011MNRAS), WD? (2018MNRAS), PM* (2018yCat), * (Gaia), UV (GALEX), Opt (SDSS)

15 54 38.3611235832 +24 10 32.525178348 (Optical) [ 0.0452 0.0574 90 ] A 2020yCat.1350....0G

15 52 30.3661736023 +24 19 15.516897573 [ 0.0452 0.0574 90 ]

039.4277297432952 +48.8324580365846 [ 0.0452 0.0574 90 ]

-41.262 43.317 [0.070 0.087 90] A 2020yCat.1350....0G

V(km/s) 0.8900 [12.39] / z(spectroscopic) 0.000003 [0.000041] / cz 0.89 [12.39] (Opt) E 2017MNRAS.469.2102A

8.9112 [0.0836] A 2020yCat.1350....0G

DA D 2011MNRAS.417.1210G

G 17.602129 [0.002911] C 2020yCat.1350....0G

u (AB) 17.947 [0.012] C 2015ApJS..219...12A

g (AB) 17.543 [0.005] C 2015ApJS..219...12A

r (AB) 17.704 [0.006] C 2015ApJS..219...12A

i (AB) 17.877 [0.007] C 2015ApJS..219...12A

z (AB) 18.112 [0.020] C 2015ApJS..219...12A

Overlay

points in this preview

2MASS DSS

All

(CDSPortal)

Send to

An access of full data is available using the icon Vizier near the identifier of the catalogue

`SDSS J155438.34+241032.6`	`SDSS J155438.35+241032.6`	`Gaia DR3 1218748892101806720`
`GALEX J155438.3+241032`	`Gaia DR2 1218748892101806720`

References (13 between 1850 and 2026) (Total 13)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).

Follow new references on this object

Collections of Measurements

External archives :

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

Data at NED - NASA/IPAC Extragalactic Database : GALEX J155438.3+241032

Link by name to the catalogue in VizieR :

SDSS J155438.34+241032.6 GALEX J155438.3+241032 SDSS J155438.35+241032.6 Gaia DR2 1218748892101806720 Gaia DR3 1218748892101806720

Search by coordinates in Vizier (radius: 5 arcsec)

Annotations :
Annotations allow a user to add a note or report an error concerning the astronomical object and its data. It requires registration to post a note. See description .
Please, have a look at Best practices. The list of all annotations to SIMBAD objects can be found here .

The annotation server is currently not available. Sorry for any inconvenience

To bookmark this query, right click on this link: simbad:objects in 2022RNAAS...6..107S and select 'bookmark this link' or equivalent in the popup menu