2002A&A...391..587R


Query : 2002A&A...391..587R

2002A&A...391..587R - Astronomy and Astrophysics, volume 391, 587-593 (2002/8-4)

Detection of δ Scuti-like pulsation in H254, a pre-main sequence F-type star in IC 348.

RIPEPI V., PALLA F., MARCONI M., BERNABEI S., ARELLANO FERRO A., TERRANEGRA L. and ALCALA J.M.

Abstract (from CDS):

We present time series observations of intermediate mass PMS stars belonging to the young star cluster IC 348. The new data reveal that a young member of the cluster, H254, undergoes periodic light variations with δ Scuti-like characteristics. This occurrence provides an unambiguous evidence confirming the prediction that intermediate-mass pre-main sequence (PMS) stars should experience this transient instability during their approach to the main-sequence. On the basis of the measured frequency f=7.406d–1, we are able to constrain the intrinsic stellar parameters of H254 by means of linear, non adiabatic, radial pulsation models. The range of the resulting luminosity and effective temperature permitted by the models is narrower than the observational values. In particular, the pulsation analysis allows to derive an independent estimate of the distance to IC 348 of about 320pc. Further observations could either confirm the monoperiodic nature of H254 or reveal the presence of other frequencies.

Abstract Copyright:

Journal keyword(s): stars: variables: δ Scuti - stars: oscillations - stars: fundamental parameters - stars: pre-main sequence

Simbad objects: 11

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Number of rows : 11
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 NGC 1333 OpC 03 29 11 +31 18.6           ~ 1345 1
2 NAME Perseus Cloud SFR 03 35.0 +31 13           ~ 1239 0
3 Ass Per OB 2 As* 03 42.2 +33 26           ~ 326 0
4 IC 348 3 * 03 43 58.0316277552 +32 09 47.110716324   12.09 11.34     F8 16 0
5 Cl* IC 348 LRL 30 Y*O 03 44 19.1233580656 +32 09 31.285007760   12.70 11.90 11.24 11.008 F0 48 0
6 Cl* IC 348 LRL 10 Y*O 03 44 24.6652850040 +32 10 15.076520436   12.53 11.59   10.416 F2 36 0
7 V* V705 Per dS* 03 44 31.1966304792 +32 06 22.152587220   11.3 10.6   9.474 F3V 47 0
8 IC 348 OpC 03 44 32 +32 09.5           ~ 1321 1
9 V* V351 Ori Ae* 05 44 18.7949456328 +00 08 40.410217104 9.44 9.22 8.87     A7V 108 0
10 NGC 2264 OpC 06 40 52 +09 52.6           ~ 1703 0
11 NGC 2362 OpC 07 18 41 -24 57.2           ~ 384 0

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2022.10.02-01:51:23

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