2006MNRAS.373..330C

Query : 2006MNRAS.373..330C

2006MNRAS.373..330C - Mon. Not. R. Astron. Soc., 373, 330-336 (2006/November-3)

Spectroscopic analysis of the SB3 system 74Aqr.

CATANZARO G. and LEONE F.

Abstract (from CDS):

In this paper, we present the first quantitative abundance analysis of the SB3 system whose primary is the well-known mercury-manganese (HgMn) star 74Aqr (= HD216494). From the fit of the Hβ profile, obtained at the orbital phase of maximum separation between A and B components, we determined the effective temperatures and surface gravities of each component: TAeff= 12000 K, loggA = 3.70, TBeff= 11500 K, loggB = 3.90 and TCeff= 11500 K, loggC = 4.10. These values are validated by the coincidence of abundances derived from different ionization states of iron.

We find that this system is heterogeneous from the point of view of the chemical composition: HD216494A shows the typical spectral features, with the exception of strontium underabundance, of HgMn stars. Apart from a mild helium underabundance and overabundance of two rare earths (praseodymium and neodymium), HD216494B does not show any other anomaly. The fast rotating C component, in spite of the difficulties found in the identification of its spectral lines, seems to be the only normal star of the system.


Abstract Copyright: 2006 The Authors. Journal compilation © 2006 RAS

Journal keyword(s): stars: abundances - stars: chemically peculiar - stars: individual: 74 Aqr

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 * 74 Aqr a2* 22 53 28.7049178152 -11 36 59.453153568 5.41 5.709 5.780     B8IV/V 160 0

Query : 2006MNRAS.373..330C

Basic data :
* 74 Aqr -- alpha2 CVn Variable
Other object types: otypes_help 		a2* (), * (*,ALS,...), ** (**,CCDM,...), SB* (SBC7,SBC9), V* (2013MNRAS,V*), UV (TD1), NIR (2MASS)
ICRS coord. (ep=J2000) : 		22 53 28.7049178152 -11 36 59.453153568 (Optical) [ 0.5506 0.3475 90 ] A 2020yCat.1350....0G
FK4 coord. (ep=B1950 eq=1950) : 		22 50 50.8074256519 -11 52 58.317133469 [ 0.5506 0.3475 90 ]
Gal coord. (ep=J2000) : 		056.4228358025764 -58.2805842879060 [ 0.5506 0.3475 90 ]
Proper motions mas/yr : 		21.539 2.282 [0.465 0.459 90] A 2020yCat.1350....0G
Radial velocity / Redshift / cz : 		V(km/s) -7.10 [4.3] / z(~) -0.000024 [0.000014] / cz -7.10 [4.30]
   C 2006AstL...32..759G
Parallaxes (mas): 		5.5008 [0.6556] A 2020yCat.1350....0G
Spectral type: 		B8IV/V D 1988MSS...C04....0H
Fluxes (7) :
U 5.41 [~] D 2003AJ....125.2531R
B 5.709 [0.014] D 2000A&A...355L..27H
V 5.780 [0.009] D 2000A&A...355L..27H
G 5.759569 [0.004494] C 2022yCat.1355....0G
J 5.899 [0.018] C 2003yCat.2246....0C
H 5.963 [0.021] C 2003yCat.2246....0C
K 5.925 [0.020] C 2003yCat.2246....0C
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Identifiers (33) :
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* 74 Aqr HD 216494 SBC7 933 V* HI Aqr
** MCA 73 HIC 113031 SBC9 1403 WDS J22535-1137AB
ALS 16473 HIP 113031 SKY# 43483 WEB 20122
BD-12 6371 HR 8704 TD1 29427 YZC 11 8048
CCDM J22535-1137AB JP11 3545 TIC 36693463 Gaia DR2 2604809296072674944
GC 31918 2MASS J22532869-1136595 TYC 5816-131-1 Gaia DR3 2604809296072674944
GCRV 73603 PPM 240893 UBV 19613
GEN# +1.00216494 Renson 59790 UBV M 26689
GSC 05816-00131 SAO 165359 uvby98 100216494

References (160 between 1850 and 2026) (Total 160)
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 : 2    Distance : 1    Rot : 7    Fe/H : 1    Plx : 4    PM : 5    SpT : 4   

   

Observing logs
ISO : 1   

   

External archives :

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

Link by name to the catalogue in VizieR :

ALS 16473 BD-12 6371 CCDM J22535-1137AB GSC 05816-00131 HD 216494
HIC 113031 HIP 113031 HR 8704 2MASS J22532869-1136595 PPM 240893
SAO 165359 TD1 29427 TYC 5816-131-1 uvby98 100216494 V* HI Aqr
WDS J22535-1137AB YZC 11 8048 Gaia DR2 2604809296072674944 Gaia DR3 2604809296072674944

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