2010A&A...517A...7Z

Query : 2010A&A...517A...7Z

2010A&A...517A...7Z - Astronomy and Astrophysics, volume 517A7-7 (2010/7-1)

On the shape of rapidly rotating stars.

ZAHN J.-P., RANC C. and MOREL P.

Abstract (from CDS):

The critical surface of a rapidly rotating star is determined, assuming that the rotation is either uniform or shellular (angular velocity constant on level surfaces, but increasing with depth). A step beyond the classical Roche model, where the entire mass is assumed to be gathered at the center of the star, here the quadrupolar moment of the mass distribution is taken into account through a linear perturbation method. The flattening (defined here as the ratio between the equatorial and the polar radius) can somewhat exceed the 3/2 value of the Roche model, depending on the strength of the interior rotation. The result is applied to a star of 7 solar masses, which is the mass of Achernar, the star with the largest flattening detected so far through optical interferometry.

Abstract Copyright: ∼

Journal keyword(s): stars: imaging - stars: rotation - stars: individual: Achernar (α Eri)

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 * alf Eri Be* 01 37 42.84548 -57 14 12.3101 -0.36 0.30 0.46 0.49 0.60 B6Vpe 495 1

Query : 2010A&A...517A...7Z

Basic data :
* alf Eri -- Be Star
Other object types: otypes_help 		* (*,ALS,...), V* (NSV,V*), Be* (1982IAUS), Em* (EM*), HV* (2012NewAR), Ro* (2019ApJ), X (2XMM), UV (TD1), NIR (2MASS), IR (IRAS)
ICRS coord. (ep=J2000) : 		01 37 42.84548 -57 14 12.3101 (Optical) [ 5.09 4.40 90 ] A 2007A&A...474..653V
FK4 coord. (ep=B1950 eq=1950) : 		01 35 51.31767 -57 29 24.9134 [ 5.09 4.40 90 ]
Gal coord. (ep=J2000) : 		290.84124169 -58.79200969 [ 5.09 4.40 90 ]
Proper motions mas/yr : 		87.00 -38.24 [0.58 0.50 0] A 2007A&A...474..653V
Radial velocity / Redshift / cz : 		V(km/s) 8.470 [2.160] / z(~) 0.000028 [0.000007] / cz 8.47 [2.16]
   (Opt) C 2023ApJS..266...11B
Parallaxes (mas): 		23.39 [0.57] A 2007A&A...474..653V
Spectral type: 		B6Vpe C 2006MNRAS.371..252L
Fluxes (8) :
U -0.36 [~] C 2002yCat.2237....0D
B 0.30 [~] C 2002yCat.2237....0D
V 0.46 [~] C 2002yCat.2237....0D
R 0.49 [~] C 2002yCat.2237....0D
I 0.60 [~] C 2002yCat.2237....0D
J 0.80 [~] C 2002yCat.2237....0D
H 0.85 [~] C 2002yCat.2237....0D
K 0.88 [~] C 2002yCat.2237....0D
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notes:

Identifiers (37) :
An access of full data is available using the icon Vizier near the identifier of the catalogue

* alf Eri GSC 08478-01395 NSV 15353 UBV 1700
ALS 16724 HD 10144 PLX 344 UBV M 8330
CD-57 316 HIC 7588 PLX 344.00 uvby98 100010144
CPC 20 447 HIP 7588 PPM 331199 V* alf Eri
CPD-57 334 HR 472 ROT 233 WEB 1623
EM* CDS 176 IRAS 01358-5729 SAO 232481 2XMM J013742.5-571413
FK5 54 JP11 517 SKY# 2444 [JE82] 39
GC 1979 2MASS J01374284-5714119 TD1 938
GCRV 916 N30 335 TIC 230981971
GEN# +1.00010144 NAME Achernar TYC 8478-1395-1

References (495 between 1850 and 2026) (Total 495)
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 : 6    Rot : 6    Fe/H : 3    Plx : 3    PM : 4    SpT : 13   

   

Observing logs
ISO : 8    IUE : 11   

   

External archives :

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

Data at NED - NASA/IPAC Extragalactic Database : * alf Eri

Link by name to the catalogue in VizieR :

ALS 16724 CD-57 316 CPD-57 334 FK5 54 GSC 08478-01395
HD 10144 HIC 7588 HIP 7588 HR 472 IRAS 01358-5729
2MASS J01374284-5714119 NSV 15353 PLX 344 PPM 331199 SAO 232481
TD1 938 TYC 8478-1395-1 uvby98 100010144 V* alf Eri

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