2003A&A...401..661K

Query : 2003A&A...401..661K

2003A&A...401..661K - Astronomy and Astrophysics, volume 401, 661-668 (2003/4-2)

Line profile variations in classical Cepheids. Evidence for non-radial pulsations?

KOVTYUKH V.V., ANDRIEVSKY S.M., LUCK R.E. and GORLOVA N.I.

Abstract (from CDS):

We have investigated line profiles in a large sample of Cepheid spectra, and found four stars that show unusual (for Cepheids) line profile structure (bumps or/and asymmetries). The profiles can be phase dependent but the behavior persists over many cycles. The asymmetries are unlikely to be due to the spectroscopic binarity of these stars or the specific velocity field in their atmospheres caused by shock waves. As a preliminary hypothesis, we suggest that the observed features on the line profiles in the spectra of X Sgr, V1334 Cyg, EV Sct and BG Cru can be caused by the non-radial oscillations. It is possible that these non-radial oscillations are connected to resonances between the radial modes (3.2d, 7.5d or 10.0d).

Abstract Copyright: ∼

Journal keyword(s): stars: oscillations - stars: variables: Cepheids - stars: individual: X Sgr, V1334 Cyg, EV Sct, BG Cru

Simbad objects: 17

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Number of rows : 17
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 V* DL Cas cC* 00 29 58.5888773064 +60 12 43.065292140 10.66 9.88 8.63   7.582 G1Ib-IIHdel-1 331 0
2 V* SU Cas cC* 02 51 58.7511911208 +68 53 18.606894036 6.92 6.44 5.80     F5.5III+ 424 1
3 V* RX Aur cC* 05 01 23.1881833128 +39 57 37.423107252   8.49 7.62   6.594 G0III 210 0
4 V* V810 Cen LP* 11 43 31.1923164072 -62 29 21.827165856 6.18 5.83 5.03 4.27 3.91 G0_0-IaFe1 151 0
5 * 35 Cru cC* 12 31 40.3303562544 -59 25 26.124690324 6.60 6.19 5.53     F7Ib/II 140 0
6 V* V340 Nor cC* 16 13 17.3997630552 -54 14 05.586545400   9.61 8.47 8.83   G2Iab 160 1
7 V* X Sgr cC* 17 47 33.6239490288 -27 49 50.835778896 5.84 5.34 4.54 6.03 3.661 F7II 333 0
8 V* Y Sgr cC* 18 21 22.9862401944 -18 51 36.006450458 7.31 6.69 5.75   4.810 F8II 289 0
9 V* EV Sct cC* 18 36 39.6017483712 -08 11 05.361288684   10.99 9.90     F8Ib 250 0
10 V* FM Aql cC* 19 09 15.9900952128 +10 33 08.961371208 9.76 9.05 7.89   6.725 F2I 188 0
11 V* V473 Lyr cC* 19 15 59.4893949000 +27 55 34.686262056 7.18 6.770 6.153     F8Ib-II 216 0
12 V* SU Cyg cC* 19 44 48.7341456312 +29 15 52.895535048 7.10 6.88 6.44 6.06 5.84 F2Iab:+B8.0V 299 0
13 V* S Vul cC* 19 48 23.8063718736 +27 17 11.428754460   11.392 9.551 8.775   K0 193 0
14 V* V1334 Cyg cC* 21 19 22.1791528656 +38 14 14.868825648   6.364 5.882     F1II+B7.0V 190 0
15 V* Y Lac cC* 22 09 02.9002579560 +51 02 45.084186096   9.79 9.13   8.292 F8 175 0
16 * del Cep cC* 22 29 10.2626640314 +58 24 54.697613650 4.71 4.35 3.75   3.219 F5Iab:+B7-8 730 0
17 * rho Cas LP* 23 54 23.0325302520 +57 29 57.774737400 7.00 5.85 4.59 3.63 2.89 G2_0 383 0

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