2025RNAAS...9..195M

Query : 2025RNAAS...9..195M

2025RNAAS...9..195M - Research Notes of the AAS, 9, 195 (2025/July-0)

Determination of the Abundance of Mercury from the Hg II Line at 5677.10 Å. XXIII. HD 90264 B (L Car).

MONIER R.

Abstract (from CDS):

The weak line of Hg II located at 5677.10 Å is detected in UVES spectra of the HgMn star HD 90264 B as a feature absorbing about 1% of the continuum. The synthesis of this line yields a mercury abundance which is slightly lower than the abundance derived from the 3983.93 Å line. Line synthesis is used to measure the abundances of several other elements for the first time. The following excesses/deficiencies are found: helium (-1.10 dex), magnesium (-1.00 dex), phosphorus (+1.65), titanium (-0.52), chromium (-1.30), manganese (0.00), iron (-0.46), gallium (+2.54), baryum (+0.90) and mercury (+4.40). A conservative uncertainty on the excesses/deficiencies is estimated to be ±0.10 dex. HD 90264 B may be a phosphorus-gallium-mercury-rich star rather than a HgMn star. More abundances are needed to clarify the nature of this star.

Abstract Copyright: © 2025. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): Chemically peculiar stars - Mercury-manganese stars

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 * L Car * 10 22 58.1465809448 -66 54 05.385596996 4.35 4.86 4.99     B8V 120 0

Query : 2025RNAAS...9..195M

Basic data :
* L Car -- Star
Other object types: otypes_help 		* (*,CPC,...), SB* (1977A&AS), UV (TD1), NIR (2MASS)
ICRS coord. (ep=J2000) : 		10 22 58.1465809448 -66 54 05.385596996 (Optical) [ 0.0913 0.0895 90 ] A 2020yCat.1350....0G
FK4 coord. (ep=B1950 eq=1950) : 		10 21 29.0430280998 -66 38 53.303013237 [ 0.0913 0.0895 90 ]
Gal coord. (ep=J2000) : 		289.0967431168166 -08.1064118902765 [ 0.0913 0.0895 90 ]
Proper motions mas/yr : 		-22.271 11.581 [0.105 0.105 90] A 2020yCat.1350....0G
Radial velocity / Redshift / cz : 		V(km/s) 12.00 [4.2] / z(~) 0.000040 [0.000014] / cz 12.00 [4.20]
   C 2006AstL...32..759G
Parallaxes (mas): 		7.7553 [0.0988] A 2020yCat.1350....0G
Spectral type: 		B8V C 1975MSS...C01....0H
Fluxes (7) :
U 4.35 [~] C 2002yCat.2237....0D
B 4.86 [~] C 2002yCat.2237....0D
V 4.99 [~] C 2002yCat.2237....0D
G 4.929765 [0.003096] C 2022yCat.1355....0G
J 5.204 [0.018] C 2003yCat.2246....0C
H 5.292 [0.029] C 2003yCat.2246....0C
K 5.314 [0.024] C 2003yCat.2246....0C
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Hierarchy : number of linked objects
whatever the membership probability is (see description here ) :

: 1 : 1586 Display criteria :

Identifiers (29) :
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* 191 Car GSC 08968-01393 Renson 25960 UBV M 16200
* L Car HD 90264 ROT 1565 uvby98 100090264
CPC 21 2112 HIC 50847 SAO 250940 WEB 9305
CPD-66 1243 HIP 50847 SKY# 19938 Gaia DR2 5245074230075552128
FK5 2834 HR 4089 TD1 14823 Gaia DR3 5245074230075552128
GC 14283 2MASS J10225812-6654053 TIC 344404782
GCRV 6536 N30 2467 TYC 8968-1393-1
GEN# +1.00090264 PPM 357955 UBV 9630

References (120 between 1850 and 2026) (Total 120)
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

Velocities : 5    Distance : 2    Fe/H : 4    Plx : 4    PM : 6    SpT : 2   

   

Observing logs
IUE : 3   

   

External archives :

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

Link by name to the catalogue in VizieR :

CPD-66 1243 FK5 2834 GSC 08968-01393 HD 90264 HIC 50847
HIP 50847 HR 4089 2MASS J10225812-6654053 PPM 357955 SAO 250940
TD1 14823 TYC 8968-1393-1 uvby98 100090264 Gaia DR2 5245074230075552128 Gaia DR3 5245074230075552128

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