2025PASJ...77.1365L

Query : 2025PASJ...77.1365L

2025PASJ...77.1365L - Publ. Astron. Soc. Jap., 77, 1365-1371 (2025/December-0)

The eclipsing γ Doradus star V421 Pegasi.

LEE J.W.

Abstract (from CDS):

We present high-precision TESS photometry of V421 Pegasi (V421 Peg, TIC 301747091), an early F-type eclipsing binary containing a candidate $\gamma$ Doradus ($\gamma$ Dor) component. The observed short-cadence data allow the detection of pulsation signals, along with revision of the fundamental properties of the component stars. Detailed binary modeling indicated that the program target is a partially eclipsing detached system in a circular orbit and that both components are currently in super-synchronous states. The radii of each star were measured with an accuracy of about 1%. By periodogram analysis of the outside-eclipse residual lights obtained from the binary star model, we extracted nine significant signals, five of which are likely aliasing frequencies due to sampling artifacts and uncorrected trends in the data used. The other signals of $f_1$, $f_2$, $f_3$, and $f_6$ are considered to be independent pulsations with frequencies ranging from 0.73 to 1.02 d$^{-1}$, corresponding to pulsation constants of 0.63-0.88 d. These frequencies, pulsation constants, and position on the Hertzsprung-Russell diagram reveal that the pulsating signals are $\gamma$ Dor variables arising from the V421 Peg primary component.

Abstract Copyright: © The Author(s) 2025. Published by Oxford University Press on behalf of the Astronomical Society of Japan. All rights reserved. For commercial re-use, please contact for reprints and translation rights for reprints. All other permissions can be obtained through our RightsLink service via the Permissions link on the article page on our site-for further information please contact

Journal keyword(s): asteroseismology - binaries: eclipsing - stars: fundamental parameters - stars: individual (V421 Pegasi) - stars: oscillations (including pulsations)

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 V* V421 Peg SB* 00 07 02.0005951776 +22 50 40.033429692   8.65 8.28     F0 34 0

Query : 2025PASJ...77.1365L

Basic data :
V* V421 Peg -- Spectroscopic Binary
Other object types: otypes_help 		* (2020A&A,HD,...), V* (ASAS,V*), SB* (2022yCat), EB* (2022yCat), NIR (2MASS)
ICRS coord. (ep=J2000) : 		00 07 02.0005951776 +22 50 40.033429692 (Optical) [ 0.0201 0.0179 90 ] A 2020yCat.1350....0G
FK4 coord. (ep=B1950 eq=1950) : 		00 04 27.4985430801 +22 33 58.903915324 [ 0.0201 0.0179 90 ]
Gal coord. (ep=J2000) : 		109.7547916168182 -38.8884333914226 [ 0.0201 0.0179 90 ]
Proper motions mas/yr : 		10.637 -14.107 [0.026 0.026 90] A 2020yCat.1350....0G
Radial velocity / Redshift / cz : 		V(km/s) -0.8 [8.7] / z(~) -0.000003 [0.000029] / cz -0.80 [8.70]
   D 1999A&AS..137..451G
Parallaxes (mas): 		6.5051 [0.0253] A 2020yCat.1350....0G
Spectral type: 		F0 E 1993yCat.3135....0C
Fluxes (6) :
B 8.65 [0.02] D 2000A&A...355L..27H
V 8.28 [0.01] D 2000A&A...355L..27H
G 8.1975 [0.0004] C 2018yCat.1345....0G
J 7.586 [0.035] C 2003yCat.2246....0C
H 7.407 [0.057] C 2003yCat.2246....0C
K 7.396 [0.020] C 2003yCat.2246....0C
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Hierarchy : number of linked objects
whatever the membership probability is (see description here ) :

: 1 : 4730 Display criteria :

Identifiers (22) :
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HD 222 GSC 01729-00206 SAO 73750 YZ 22 2
AG+22 9 HIC 578 SKY# 205 Gaia DR2 2847328300933441152
AGKR 64 HIP 578 TIC 301747091 Gaia DR3 2847328300933441152
ASAS J000702+2250.7 2MASS J00070199+2250399 TYC 1729-206-1 Gaia DR1 2847328296637819648
BD+22 4955 PMC 90-93 1510 uvby98 100000222
GEN# +1.00000222 PPM 89418 V* V421 Peg

References (34 between 1850 and 2026) (Total 34)
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 : 1    Distance : 3    Var : 2    Fe/H : 1    Plx : 5    PM : 6    SpT : 1   

   

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HD 222 AG+22 9 BD+22 4955 GSC 01729-00206 HIC 578
HIP 578 2MASS J00070199+2250399 PPM 89418 SAO 73750 TYC 1729-206-1
uvby98 100000222 V* V421 Peg Gaia DR2 2847328300933441152 Gaia DR3 2847328300933441152 Gaia DR1 2847328296637819648

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