2016A&A...591L...6I

Query : 2016A&A...591L...6I

2016A&A...591L...6I - Astronomy and Astrophysics, volume 591L6-6 (2016/7-1)

The slowly pulsating B-star 18 Pegasi: A testbed for upper main sequence stellar evolution.

IRRGANG A., DESPHANDE A., MOEHLER S., MUGRAUER M. and JANOUSCH D.

Abstract (from CDS):

The predicted width of the upper main sequence in stellar evolution models depends on the empirical calibration of the convective overshooting parameter. Despite decades of discussions, its precise value is still unknown and further observational constraints are required to gauge it. Based on a photometric and preliminary asteroseismic analysis, we show that the mid B-type giant 18 Peg is one of the most evolved members of the rare class of slowly pulsating B-stars and, thus, bears tremendous potential to derive a tight lower limit for the width of the upper main sequence. In addition, 18 Peg turns out to be part of a single-lined spectroscopic binary system with an eccentric orbit that is greater than 6 years. Further spectroscopic and photometric monitoring and a sophisticated asteroseismic investigation are required to exploit the full potential of this star as a benchmark object for stellar evolution theory.

Abstract Copyright: © ESO, 2016

Journal keyword(s): binaries: spectroscopic - stars: early-type - stars: individual: 18 Peg - stars: oscillations

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 * 18 Peg * 22 00 07.9250290512 +06 43 02.810180604 5.31 5.88 6.00     B3III 119 0

Query : 2016A&A...591L...6I

Basic data :
* 18 Peg -- Star
Other object types: otypes_help 		* (*,AG,...), UV (TD1), NIR (2MASS)
ICRS coord. (ep=J2000) : 		22 00 07.9250290512 +06 43 02.810180604 (Optical) [ 0.0931 0.0942 90 ] A 2020yCat.1350....0G
FK4 coord. (ep=B1950 eq=1950) : 		21 57 37.9929336257 +06 28 37.271647969 [ 0.0931 0.0942 90 ]
Gal coord. (ep=J2000) : 		065.8010614846482 -36.5064095582422 [ 0.0931 0.0942 90 ]
Proper motions mas/yr : 		16.209 0.531 [0.112 0.117 90] A 2020yCat.1350....0G
Radial velocity / Redshift / cz : 		V(km/s) -7.40 [1.6] / z(~) -0.000025 [0.000005] / cz -7.40 [1.60]
   B 2006AstL...32..759G
Parallaxes (mas): 		2.1733 [0.1164] A 2020yCat.1350....0G
Spectral type: 		B3III C ~
Fluxes (7) :
U 5.31 [~] C 2002yCat.2237....0D
B 5.88 [~] C 2002yCat.2237....0D
V 6.00 [~] C 2002yCat.2237....0D
G 5.966677 [0.002920] C 2022yCat.1355....0G
J 6.189 [0.021] C 2003yCat.2246....0C
H 6.212 [0.040] C 2003yCat.2246....0C
K 6.238 [0.024] C 2003yCat.2246....0C
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Identifiers (30) :
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* 18 Peg GSC 00564-01847 N30 4849 UBV M 26048
AG+06 3022 HD 209008 PPM 172531 uvby98 100209008
ALS 14841 HGAM 1046 SAO 127219 WEB 19543
BD+06 4940 HIC 108612 SKY# 41925 YZ 6 11054
FK5 3759 HIP 108612 TD1 28667 Gaia DR2 2721401749600227200
GC 30779 HR 8385 TIC 344019616 Gaia DR3 2721401749600227200
GCRV 13816 2MASS J22000792+0643026 TYC 564-1847-1
GEN# +1.00209008 MCW 1019 UBV 18805

References (119 between 1850 and 2026) (Total 119)
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 : 10    Distance : 3    Rot : 6    Fe/H : 4    Plx : 4    PM : 7    SpT : 7   

   

Observing logs
IUE : 3   

   

External archives :

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

Link by name to the catalogue in VizieR :

AG+06 3022 ALS 14841 BD+06 4940 FK5 3759 GSC 00564-01847
HD 209008 HIC 108612 HIP 108612 HR 8385 2MASS J22000792+0643026
PPM 172531 SAO 127219 TD1 28667 TYC 564-1847-1 uvby98 100209008
Gaia DR2 2721401749600227200 Gaia DR3 2721401749600227200

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