2003A&A...406..287T


C.D.S. - SIMBAD4 rel 1.7 - 2020.11.28CET01:53:42

2003A&A...406..287T - Astronomy and Astrophysics, volume 406, 287-292 (2003/7-4)

Seismic modelling of the β Cep star EN(16) Lacertae.

THOUL A., AERTS C., DUPRET M.-A., SCUFLAIRE R., KOROTIN S.A., EGOROVA I.A., ANDRIEVSKY S.M., LEHMANN H., BRIQUET M., DE RIDDER J. and NOELS A.

Abstract (from CDS):

We perform seismic modelling of the massive β Cep star EN Lacertae. The starting point of our analysis is the spectroscopic mode identification recently performed. To this, we add a new updated photometric mode identification based upon a non-adiabatic description of the eigenfunctions in the outer atmosphere. Both mode identifications agree and this allows us to fine-tune the stellar parameters of ENLacertae with unprecedented precision. This is done by producing a huge amount of stellar models with different parameters and selecting those that fulfill the frequency values and the mode identification. Our study is the first one of its kind in which a reconcilation between observed pulsational characteristics and theoretical models can be achieved at a level that allows accurate determination of the basic stellar parameters of a massive oscillator. We derive a mass of M=9.62±0.11M and an age of 15.7 million years if we assume that convective overshooting does not occur.

Abstract Copyright:

Journal keyword(s): stars: binaries: spectroscopic - stars: variables: general - stars: individual: EN(16) Lac

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 - 2021
#notes
1 * 16 Lac bC* 22 56 23.6292923788 +41 36 13.948197878 4.61 5.436 5.587     B2IV 298 0

    Equat.    Gal    SGal    Ecl

C.D.S. - SIMBAD4 rel 1.7 - 2020.11.28CET01:53:42

Available data : Basic data  •  Identifiers  •  Plot & images  •  Bibliography  •  Measurements  •  External archives  •  Notes  •  Annotations


Basic data :
* 16 Lac -- Variable Star of beta Cep type
Origin of the objects types :

(Ref) Object type as listed in the reference "Ref"
(acronym) Object type linked to the acronym according to the original reference
() Anterior to 2007, before we can link the objet type to a reference, or given by the CDS team in some particular cases

Other object types:
bC* (), * (*,AG,...), ** (ADS,CCDM,...), UV (CEL,TD1), SB* (SBC7,SBC9), V* (V*), IR (2MASS)
Syntax of coordinates is : "ra dec (wtype) [error ellipse] quality bibcode" :
  • ra dec : right ascension and declination (unit and frame defined according to your Output Options)
    Grey values are increasing the original precision due to the computation of frame transformations
  • (wtype) : wavelength class for the origin of the coordinates (Rad, mm, IR, Optical, UV, Xray, Gam)
  • [error ellipse] : measurement uncertainty, on (ra,dec) if the positional angle is 90 degrees, on (majaxis,minaxis) otherwise (in mas at defined epoch in the original catalogue),
    position angle (in degrees North celestial pole to East)
  • quality : flag of quality
    • E ≥ 10"
    • D : 1-10" (and some old data)
    • C : 0.1-1"
    • B : 0.01-0.1" + 2MASS, Tyc
    • A : VLBI, Hipparcos
  • bibcode : bibcode of the coordinates reference
ICRS coord. (ep=J2000) :
22 56 23.6292923788 +41 36 13.948197878 (Optical) [ 0.0686 0.0619 90 ] A 2018yCat.1345....0G
Syntax of coordinates is : "ra dec (wtype) [error ellipse] quality bibcode" :
  • ra dec : right ascension and declination (unit and frame defined according to your Output Options)
    Grey values are increasing the original precision due to the computation of frame transformations
  • (wtype) : wavelength class for the origin of the coordinates (Rad, mm, IR, Optical, UV, Xray, Gam)
  • [error ellipse] : measurement uncertainty, on (ra,dec) if the positional angle is 90 degrees, on (majaxis,minaxis) otherwise (in mas at defined epoch in the original catalogue),
    position angle (in degrees North celestial pole to East)
  • quality : flag of quality
    • E ≥ 10"
    • D : 1-10" (and some old data)
    • C : 0.1-1"
    • B : 0.01-0.1" + 2MASS, Tyc
    • A : VLBI, Hipparcos
  • bibcode : bibcode of the coordinates reference
FK4 coord. (ep=B1950 eq=1950) :
22 54 06.3255000030 +41 20 11.829228266 [ 0.0686 0.0619 90 ]
Syntax of coordinates is : "ra dec (wtype) [error ellipse] quality bibcode" :
  • ra dec : right ascension and declination (unit and frame defined according to your Output Options)
    Grey values are increasing the original precision due to the computation of frame transformations
  • (wtype) : wavelength class for the origin of the coordinates (Rad, mm, IR, Optical, UV, Xray, Gam)
  • [error ellipse] : measurement uncertainty, on (ra,dec) if the positional angle is 90 degrees, on (majaxis,minaxis) otherwise (in mas at defined epoch in the original catalogue),
    position angle (in degrees North celestial pole to East)
  • quality : flag of quality
    • E ≥ 10"
    • D : 1-10" (and some old data)
    • C : 0.1-1"
    • B : 0.01-0.1" + 2MASS, Tyc
    • A : VLBI, Hipparcos
  • bibcode : bibcode of the coordinates reference
Gal coord. (ep=J2000) :
100.9168863001196 -16.2978014202888 [ 0.0686 0.0619 90 ]
Syntax of proper motions is : "pm-ra pm-dec [error ellipse] quality bibcode"
  • pm-ra : mu-ra*cos(dec) (expressed in the ICRS system in mas/yr)
  • pm-dec : mu-dec (expressed in the ICRS system in mas/yr)
  • [error ellipse] : error major axis and minor axis (in mas), orientation angle (in deg)
  • quality : flag of quality (A=best quality -> E=worst quality, {� } =unknown quality)
  • bibcode : bibcode of the proper motion reference
Proper motions mas/yr :
-1.188 -4.290 [0.129 0.122 90] A 2018yCat.1345....0G
Syntax of radial velocity (or/and redshift) is : "value [error] (wavelength) quality bibcode"
  • value : radial velocity or/and redshift (Heliocentric frame) according to your Output Options
    (redshift may be not displayed if the data value is <0 and the database inside value is a radial velocity)
  • [error] : error of the corresponding value displayed before
  • (wavelength) : wavelength range of the measurement : Rad, mm, IR, Opt, UV, Xray, Gam or  '∼'(unknown)
  • quality : flag of quality ( A=best quality -> E=worst quality, {� } =unknown quality)
  • bibcode : bibcode of the value's origin
Radial velocity / Redshift / cz :
V(km/s) -12.45 [0.04] / z(~) -0.000042 [0.000000] / cz -12.45 [0.04]
   A 2004A&A...424..727P
Syntax of parallax is : 'value quality [error] bibcode'
  • value : parallax value
  • quality : flag of quality (A=best quality -> E=worst quality, {� } =unknown quality)
  • [error] : mean error
  • bibcode : bibcode of the parallax reference
Parallaxes (mas):
2.0692 [0.0865] A 2018yCat.1345....0G
Spectral type is made of 3 parts: %coding is composed of 4 parts :
  • the spectral type, which is made of a temperature class, eventually a luminosity class (roman number) and/or spectral peculiarities;
  • a quality letter: A=best quality→E=worst quality, {� } =unknown quality %
  • a quality letter: A=best quality -> E=worst quality, {� } =unknown quality
  • bibcode : bibcode of the spectral type reference
Spectral type:
B2IV C ~
Syntax of fluxes (or magnitudes) is : "filter-name (System) flux-value [error] quality MultVarFlags bibcode"
  • filter-name : U, B, V, R, I, G, J, H, K, u, g, r, i, z
  • (System) : may be AB (default is Vega)
  • flux-value : value of flux or magnitude
  • [error] : error value
  • quality : flag of quality of the flux value ( A=best quality -> E=worst quality, {� } =unknown quality)
  • MultVarFlags : Mult is zero or one char (J) for joined photometry ; Var can be zero or two chars (V[0-4])
  • bibcode : bibcode of the flux reference
Fluxes (7) :
U 4.61 [~] D 2003AJ....125.2531R
B 5.436 [0.014] D 2000A&A...355L..27H
V 5.587 [0.009] D 2000A&A...355L..27H
G 5.5548 [0.0012] C 2018yCat.1345....0G
J 5.879 [0.023] C 2003yCat.2246....0C
H 6.005 [0.024] C 2003yCat.2246....0C
K 6.031 [0.018] C 2003yCat.2246....0C
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Suggestions are: crowded field: 0.5 to 1.5 arcsec, 3 arcsec otherwise; uncertain coordinates (SIMBAD quality E or coordinates without reference): 5 to 30 arsec (risky!).

Hierarchy : number of linked objects
whatever the membership probability is (see description here ) :

: 1 : 16 Display criteria :

The link on the acronym of the identifiers give access to the information for this acronym in the dictionary of nomenclature.
Identifiers (38) :
An access of full data is available using the icon Vizier near the identifier of the catalogue

* 16 Lac GEN# +1.00216916A PMSC 22518+4104A UBV 21467
ADS 16381 A GSC 03223-03620 PMSC 22518+4104Aab UBV M 26727
AG+41 2244 HD 216916 PPM 63602 V* EN Lac
ALS 16173 HGAM 1096 ROT 3339 WDS J22564+4136A
BD+40 4949 HIC 113281 SAO 52512 WEB 20155
CCDM J22564+4136A HIP 113281 SBC7 936 [S78b] 396A
CEL 5546 HR 8725 SBC9 1409 Gaia DR2 1931240295282530688
CSI+40 4949 1 IDS 22518+4104 A SKY# 43570 Gaia DR1 1931240290984809984
GC 31987 2MASS J22562365+4136139 TD1 29470
GCRV 14401 N30 5047 TYC 3223-3620-1

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References (298 between 1850 and 2021) (Total 298)
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


distance : 1    velocities : 13    ROT : 5    PM : 6    Fe_H : 9    PLX : 4    MK : 14   

   

Observing logs


IUE : 9   

   


External archives :

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

Link by name to the catalogue in VizieR :

AG+41 2244 ALS 16173 BD+40 4949 CCDM J22564+4136A CEL 5546
GSC 03223-03620 HD 216916 HIC 113281 HIP 113281 HR 8725
2MASS J22562365+4136139 PPM 63602 SAO 52512 TD1 29470 TYC 3223-3620-1
V* EN Lac WDS J22564+4136A Gaia DR2 1931240295282530688 Gaia DR1 1931240290984809984

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2020.11.28-01:53:42

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