2015MNRAS.446.1889J

Query : 2015MNRAS.446.1889J

2015MNRAS.446.1889J - Mon. Not. R. Astron. Soc., 446, 1889-1894 (2015/January-2)

Radial-velocity measurements of the pulsating zirconium star: LS IV-14deg116.

JEFFERY C.S., AHMAD A., NASLIM N. and KERZENDORF W.

Abstract (from CDS):

The helium-rich hot subdwarf LS IV -14°116 shows remarkably high surface abundances of zirconium, yttrium, strontium, and germanium, indicative of strong chemical stratification in the photosphere. It also shows photometric behaviour indicative of non-radial g-mode pulsations, despite having surface properties inconsistent with any known pulsational instability zone. We have conducted a search for radial-velocity variability. This has demonstrated that at least one photometric period is observable in several absorption lines as a radial-velocity variation with a semi-amplitude in excess of 5 km/s. A correlation between line strength and pulsation amplitude provides evidence that the photosphere pulsates differentially. The ratio of light to velocity amplitude is too small to permit the largest amplitude oscillation to be radial.

Journal keyword(s): asteroseismology - stars: chemically peculiar - stars: individual: (LS IV-14deg116) - subdwarf

Simbad objects: 1

Full paper

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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	LS IV -14 116	HS*	20 57 38.8746228912	-14 25 43.991016852	11.63	12.73	13.02	13.28		sdB0.5VIIHe18	89	0

Query : 2015MNRAS.446.1889J

Basic data :

LS IV -14 116 -- Hot Subdwarf

* (2013MNRAS,UCAC2,...), blu (2019A&A), HS* (1992MNRAS), PM* (2018yCat), V* (V*), UV (GALEX), NIR (2MASS)

20 57 38.8746228912 -14 25 43.991016852 (Optical) [ 0.0478 0.0307 90 ] A 2020yCat.1350....0G

20 54 52.6322052982 -14 37 14.687055586 [ 0.0478 0.0307 90 ]

033.5786123395200 -34.3775849256333 [ 0.0478 0.0307 90 ]

7.409 -128.265 [0.056 0.041 90] A 2020yCat.1350....0G

2.3406 [0.0543] A 2020yCat.1350....0G

sdB0.5VIIHe18 B 2013A&A...551A..31D

U 11.63 [~] D 2013MNRAS.431..240O

B 12.73 [~] D 2013MNRAS.431..240O

V 13.02 [~] D 2013MNRAS.431..240O

R 13.28 [0.07] E 2012yCat.1322....0Z

G 12.946762 [0.002817] C 2020yCat.1350....0G

J 13.638 [0.027] C 2003yCat.2246....0C

H 13.80 [0.03] C 2003yCat.2246....0C

K 13.90 [0.05] C 2003yCat.2246....0C

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`UCAC2 26794502`	`GALEX J205738.7-142545`	`UCAC4 378-169675`	`Gaia DR2 6886766582082317440`
`ALS 11634`	`LS IV -14 116`	`uvby98 854140116`
`CSI-14-20549`	`2MASS J20573887-1425437`	*`V V366 Aqr`**
`EC 20548-1437`	`TIC 442482669`	`Gaia DR3 6886766582082317440`

References (89 between 1850 and 2026) (Total 89)
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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`UCAC2 26794502`	`ALS 11634`	`GALEX J205738.7-142545`	`LS IV -14 116`	`2MASS J20573887-1425437`
`UCAC4 378-169675`	`uvby98 854140116`	*`V V366 Aqr`**	`Gaia DR3 6886766582082317440`	`Gaia DR2 6886766582082317440`

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