2017MNRAS.465..234Y

Query : 2017MNRAS.465..234Y

2017MNRAS.465..234Y - Mon. Not. R. Astron. Soc., 465, 234-241 (2017/February-2)

Strange mode instability driven finite amplitude pulsations and mass-loss in models of massive zero-age main-sequence stars.

YADAV A.P. and GLATZEL W.

Abstract (from CDS):

The stability with respect to radial perturbations of massive zero-age main-sequence stars having solar chemical composition and masses between 50 and 150 M☉ is reinvestigated. As a first step, a linear non-adiabatic stability analysis is performed, confirming the existence of dynamical strange mode instabilities for models with masses above 58 M☉. For selected models, the evolution of the strange mode instabilities into the non-linear regime is followed by numerical simulation. The final results of strange mode instabilities are thus found to be finite amplitude pulsations with periods between 3 and 24 h. Mean acoustic luminosities capable to drive winds with mass-loss rates of the order of 0.5 x 10–7 M☉ yr–1, which can at most marginally affect stellar evolution in the vicinity of the zero-age main sequence, are associated with these finite amplitude pulsations.

Abstract Copyright: © 2016 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): instabilities - stars: massive - stars: mass-loss - stars: oscillations - stars: winds, outflows - stars: winds, outflows

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 * 55 Cyg s*b 20 48 56.2915921440 +46 06 50.883645024 4.83 5.28 4.86 4.41 4.10 B2.5Ia 506 0

Query : 2017MNRAS.465..234Y

Basic data :
* 55 Cyg -- Blue Supergiant
Other object types: otypes_help 		* (*,AG,...), ** (**,ADS,...), V* (CSV,V*,...), Em* (EM*,[KW97]), UV (CEL,TD1), s*b (2009A&A), Pu* (2009yCat), NIR (2MASS), IR (IRAS)
ICRS coord. (ep=J2000) : 		20 48 56.2915921440 +46 06 50.883645024 (Optical) [ 0.0669 0.0639 90 ] A 2020yCat.1350....0G
FK4 coord. (ep=B1950 eq=1950) : 		20 47 13.9553517822 +45 55 40.211139849 [ 0.0669 0.0639 90 ]
Gal coord. (ep=J2000) : 		085.7535303966882 +01.4900297490483 [ 0.0669 0.0639 90 ]
Proper motions mas/yr : 		-2.233 -2.516 [0.080 0.079 90] A 2020yCat.1350....0G
Radial velocity / Redshift / cz : 		V(km/s) -7.2 [2] / z(~) -0.000024 [0.000007] / cz -7.20 [2.00]
   E 1953GCRV..C......0W
Parallaxes (mas): 		0.5435 [0.0782] A 2020yCat.1350....0G
Spectral type: 		B2.5Ia C 2024A&A...690A.176N
Fluxes (9) :
U 4.83 [~] C 2002yCat.2237....0D
B 5.28 [~] C 2002yCat.2237....0D
V 4.86 [~] C 2002yCat.2237....0D
R 4.41 [~] C 2002yCat.2237....0D
G 4.673104 [0.003223] C 2020yCat.1350....0G
I 4.10 [~] C 2002yCat.2237....0D
J 3.89 [~] C 2002yCat.2237....0D
H 3.78 [~] C 2002yCat.2237....0D
K 3.75 [~] C 2002yCat.2237....0D
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Identifiers (46) :
An access of full data is available using the icon Vizier near the identifier of the catalogue

* 55 Cyg GC 29036 JP11 3282 UBV 18033
** HJ 1581A GCRV 13065 LS III +45 23 UBV M 25202
ADS 14337 A GEN# +1.00198478A 2MASS J20485628+4606508 V* V1661 Cyg
AG+45 1758 GSC 03575-06709 MCW 946 WDS J20489+4607A
AKARI-IRC-V1 J2048563+460650 HD 198478 PLX 4980 WEB 18624
ALS 11566 HGAM 952 PPM 60515 YPAC 203
BD+45 3291 HIC 102724 ROT 3044 [KW97] 49-52
CCDM J20489+4607A Hilt 1013 SAO 50099 AAVSO 2045+45
CEL 5176 HIP 102724 SKY# 39481 Gaia DR3 2166348110749083520
CSI+45 3291 1 HR 7977 TD1 27324 Gaia DR2 2166348110749083520
CSV 102035 IDS 20455+4545 A TIC 353210150
EM* MWC 353 IRAS 20472+4555 TYC 3575-6709-1

References (506 between 1850 and 2026) (Total 506)
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 : 8    Distance : 1    Rot : 12    Fe/H : 12    Plx : 4    PM : 6    SpT : 32   

   

Observing logs
Herschel : 4    ISO : 1    IUE : 17   

   

External archives :

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

Data at NED - NASA/IPAC Extragalactic Database : * 55 Cyg

Link by name to the catalogue in VizieR :

AG+45 1758 AKARI-IRC-V1 J2048563+460650 ALS 11566 BD+45 3291 CCDM J20489+4607A
CEL 5176 GSC 03575-06709 HD 198478 HIC 102724 HIP 102724
HR 7977 IRAS 20472+4555 LS III +45 23 2MASS J20485628+4606508 PLX 4980
PPM 60515 SAO 50099 TD1 27324 TYC 3575-6709-1 V* V1661 Cyg
WDS J20489+4607A Gaia DR3 2166348110749083520 Gaia DR2 2166348110749083520

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