2011A&A...531A.133D

Query : 2011A&A...531A.133D

2011A&A...531A.133D - Astronomy and Astrophysics, volume 531A133-133 (2011/7-1)

High-resolution spectroscopic observations of the metal-poor, chemically peculiar, and high velocity Fehrenbach & Duflot star.

DRAKE N.A. and PEREIRA C.B.

Abstract (from CDS):

We determine the atmospheric parameters and abundance pattern of the chemically peculiar metal-poor Fehrenbach & Duflot (Feh-Duf) star to more clearly understand its evolutionary state and the nature of the s-element enhancement in this star. Its atmospheric parameters and chemical abundances were determined using high resolution optical spectroscopy and employing the local-thermodynamic-equilibrium model atmospheres of Kurucz and spectral analysis code MOOG. The derived abundances show that the Feh-Duf star is a low-metallicity ([Fe/H]=-1.93) star with high carbon and heavy s-element abundances, while the abundance of the light s-process element yttrium is low ([Y/Fe]=-0.07). The oxygen abundance is lower than for Galactic halo stars of similar metallicity.We conclude that the Feh-Duf star could be a CH star with C/O=1.3. Another possibility is that the Feh-Duf star could be an early-AGB star. The Fehrenbach & Duflot star is also a lead star with [Pb/Ce]=+0.69. In addition, it displays an extreme retrograde motion (V_GRF=-259km/s), which in combination with its underabundance of α-elements suggests that this star may have been captured by the Milky Way galaxy.

Abstract Copyright: ∼

Journal keyword(s): stars: abundances - stars: individual: Feh-Duf - stars: chemically peculiar - stars: population II - stars: kinematics and dynamics - stars: fundamental parameters

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	[W63b] 74	Pe*	05 02 53.8648030464	-65 44 20.821639524		12.74	11.97	10.07		K:_CH	12	0

Query : 2011A&A...531A.133D

Basic data :

[W63b] 74 -- Chemically Peculiar Star

* (2020ApJ,TYC,...), Pe* (1981A&A), NIR (2MASS), MIR (SSTISAGEMC)

05 02 53.8648030464 -65 44 20.821639524 (Optical) [ 0.0115 0.0109 90 ] A 2020yCat.1350....0G

05 02 44.0431562599 -65 48 28.512122982 [ 0.0115 0.0109 90 ]

276.1966885989128 -35.6265707556188 [ 0.0115 0.0109 90 ]

0.631 0.655 [0.014 0.015 90] A 2020yCat.1350....0G

V(km/s) 447.2269 [0.0674] / z(spectroscopic) 0.001493 [0.000000] / cz 447.56 [0.07] (NIR) A 2022ApJS..259...35A

0.2234 [0.0113] A 2020yCat.1350....0G

K:_CH E 1981A&A...101..226F

B 12.74 [0.30] D 2000A&A...355L..27H

V 11.97 [0.20] D 2000A&A...355L..27H

R 10.07 [~] D 2008AJ....136.1242F

G 11.596759 [0.002760] C 2020yCat.1350....0G

J 9.948 [0.022] C 2003yCat.2246....0C

H 9.367 [0.024] C 2003yCat.2246....0C

K 9.214 [0.020] C 2003yCat.2246....0C

u (AB) 14.591 [0.023] C 2018PASA...35...10W

g (AB) 12.152 [0.003] B 2018PASA...35...10W

r (AB) 11.581 [0.002] B 2018PASA...35...10W

i (AB) 11.214 [0.004] B 2018PASA...35...10W

z (AB) 11.083 [0.002] B 2018PASA...35...10W

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`TYC 8889-394-1`	`2MASS J05025386-6544207`	`TIC 55785047`	`Gaia DR1 4662254516693893760`
`AP J05025386-6544207`	`NAME FEH-DUF`	`[W63b] 74`
`DCMC J050253.82-654421.1`	`SMSS J050253.86-654420.9`	`Gaia DR2 4662254521025223680`
`MACHO 55.3738.9`	`SSTISAGEMC J050253.85-654420.8`	`Gaia DR3 4662254521025223680`

References (12 between 1850 and 2026) (Total 12)
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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`TYC 8889-394-1`	`AP J05025386-6544207`	`DCMC J050253.82-654421.1`	`MACHO 55.3738.9`	`2MASS J05025386-6544207`
`SSTISAGEMC J050253.85-654420.8`	`Gaia DR2 4662254521025223680`	`Gaia DR3 4662254521025223680`	`Gaia DR1 4662254516693893760`

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