2024A&A...684A..59S

Query : 2024A&A...684A..59S

2024A&A...684A..59S - Astronomy and Astrophysics, volume 684A59 (2024/4-1)

Approaching the structure of rotating bodies from dimension reduction.

STAELEN C. and HURE J.-M.

Abstract (from CDS):

We show that the two-dimensional structure of a rigidly rotating self-gravitating body is accessible with relatively good precision by assuming a purely spheroidal stratification. With this hypothesis, the two-dimensional problem becomes one-dimensional, and consists in solving two coupled fixed-point equations in terms of equatorial mass density and eccentricity of isopycnics. We propose a simple algorithm of resolution based on the self-consistent field method. Compared to the full unconstrained-surface two-dimensional problem, the precision in the normalized enthalpy field is better than 10–3 in absolute, and the computing time is drastically reduced. In addition, this one-dimensional approach is fully appropriate to fast rotators, works for any density profile (including any barotropic equation of state), and can account for mass density jumps in the system, including the existence of an ambient pressure. Several tests are given.

Abstract Copyright: © The Authors 2024

Journal keyword(s): gravitation - methods: numerical - planets and satellites: interiors - stars: interiors - stars: rotation

Simbad objects: 1

goto Full paper

goto View the references in ADS

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 : 2024A&A...684A..59S

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
SIMBAD within arcmin
Overlay Simbad points in this preview
Back
All CDSPortal (CDSPortal)
Send to sendBySAMP sendBySAMP
sedIcon
within arcsec sed-help-icon
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).
Follow new references on this object
                Reference summaries :

                from: to:

                 or select by : (not exhaustive, explanation here)

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

Search by coordinates in Vizier (radius: 5 arcsec)

Annotations :
Annotations allow a user to add a note or report an error concerning the astronomical object and its data. It requires registration to post a note. See description .
Please, have a look at Best practices. The list of all annotations to SIMBAD objects can be found here .

The annotation server is currently not available. Sorry for any inconvenience

To bookmark this query, right click on this link: simbad:objects in 2024A&A...684A..59S and select 'bookmark this link' or equivalent in the popup menu