2003AJ....126..906S

Query : 2003AJ....126..906S

2003AJ....126..906S - Astron. J., 126, 906-917 (2003/August-0)

The spectra of type II cepheids. I. The Hα line in short-period stars.

SCHMIDT E.G., LEE K.M., JOHNSTON D., NEWMAN P.R. and SNEDDEN S.A.

Abstract (from CDS):

We present 88 Hα profiles for 24 pulsating variable stars with periods between 1 and 3 days in order to explore the behavior of this line in type II as compared with classical Cepheids. Surprisingly, large velocity differences were found between Hα and the metal lines in some type II Cepheids. Strong emission was observed in three stars, VZ Aql, NW Lyr, and V439 Oph, while line filling by incipient emission is present in seven others. All of the stars with emission and most with incipient emission belong to Diethelm's AHB2 class, and the emission is associated with the secondary bump on the rising branch of the light curve. Two stars, BF Ser and MQ Aql, show doubling of the core near maximum light, and asymmetry of the line is noted in some spectra.

Abstract Copyright: ∼

Journal keyword(s): Stars: Variables: Cepheids - Stars: Population II

Simbad objects: 24

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Number of rows : 24
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* NY Cas cC* 00 40 23.1964946016 +58 37 06.679418124           ~ 44 0
2 V* UY Eri WV* 03 13 39.1354081104 -10 26 32.405933364   11.744 11.281 11.318   F 80 0
3 V* SW Tau WV* 04 24 32.9729044632 +04 07 24.080336400   10.23 9.33     A7 120 0
4 V* EW Aur cC* 04 51 24.8479881912 +38 11 18.786824628   14.60       ~ 57 0
5 V* FF Aur cC* 04 55 18.1146521520 +39 58 46.982198784           ~ 48 0
6 V* BB Gem cC* 06 34 35.2939182408 +13 04 44.708012976   11.85 11.16     ~ 78 0
7 V* CN CMa cC* 07 09 34.5841465584 -18 33 47.853797616     13.739   12.268 ~ 29 0
8 V* BF Ser cC* 15 16 28.5001622760 +16 26 39.692610348   12.08 12.02     A9.5 51 0
9 V* V745 Oph WV* 17 20 02.9332738128 +03 48 55.958996196           ~ 31 0
10 V* CE Her RR* 17 41 56.5540526808 +15 04 30.222696036   12.557 12.200 12.299   hF5mA7 53 0
11 V* V439 Oph WV* 17 43 33.2732545608 +03 35 36.069357264   13.46 12.25     ~ 39 0
12 V* V465 Oph cC* 17 52 07.4617078872 -01 05 07.277966664   14.30 13.42 13.58   ~ 33 0
13 V* V477 Oph WV* 17 59 08.1631779360 +05 38 26.222126604   13.70       ~ 30 0
14 V* BL Her WV* 18 01 09.2240599584 +19 14 56.696475012   10.54 9.70     F0 182 0
15 V* VZ Aql WV* 19 05 02.9644174800 -06 50 58.611417504   13.80     12.607 ~ 42 0
16 V* NW Lyr WV* 19 15 56.3444420064 +34 27 08.108273484   13.03 12.22     ~ 35 0
17 V* BC Aql cC* 19 17 24.1568276184 -09 04 51.593755800       13.045   ~ 30 0
18 V* V971 Aql WV* 19 26 04.7926863624 -10 54 30.937223304   12.47 11.84     ~ 28 0
19 V* MQ Aql RR* 19 40 55.6949745864 +12 37 10.003193148           ~ 17 0
20 V* V714 Cyg WV* 19 41 48.6225177288 +37 59 33.719308764   13.20       ~ 20 0
21 V* EK Del cC* 20 54 04.8696768744 +08 33 05.607951336   12.60       ~ 40 0
22 V* VX Cap RR* 21 06 22.5081079536 -18 49 39.979326684   13.80 14.78     ~ 23 0
23 V* AU Peg WV* 21 24 00.2421322416 +18 16 43.777873164   9.993 9.355 9.203   F8 111 0
24 V* V351 Cep cC* 22 33 41.3490623952 +57 19 05.900077740   10.39 9.50     F8Ib 60 0

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