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Constraining the evolution of ZZ Ceti
Mukadam, AS; Kepler, SO; Winget, DE; Nather, RE; Kilic, M; Mullally, F; von Hippel, T; Kleinman, SJ; Nitta, A; Guzik, JA; Bradley, PA; Matthews, J; Sekiguchi, K; Sullivan, DJ; Sullivan, T; Shobbrook, RR; Birch, P; Jiang, XJ; Xu, DW; Joshi, S; Ashoka, BN; Ibbetson, P; Leibowitz, E; Ofek, EO; Meistas, EG; Janulis, R; Alisauskas, D; Kalytis, R; Handler, G; Kilkenny, D; O'Donoghue, D; Kurtz, DW; Muller, M; Moskalik, P; Ogloza, W; Zola, S; Krzesinski, J; Johannessen, F; Gonzalez-Perez, JM; Solheim, JE; Silvotti, R; Bernabei, S; Vauclair, G; Dolez, N; Fu, JN; Chevreton, M; Manteiga, M; Suarez, O; Ulla, A; Cunha, MS; Metcalfe, TS; Kanaan, A; Fraga, L; Costa, AFM; Giovannini, O; Fontaine, G; Bergeron, P; O'Brien, MS; Sanwal, D; Wood, MA; Ahrens, TJ; Silvestri, N; Klumpe, EW; Kawaler, SD; Riddle, R; Reed, MD; Watson, TK
Source PublicationBALTIC ASTRONOMY
AbstractWe report our analysis of the stability of pulsation periods in the DAV star (pulsating hydrogen atmosphere white dwarf) ZZ Ceti, also called R 548. Based on observations that span 31 years, we conclude that the period 213.132605 s observed in ZZ Ceti drifts at a rate dP/dtless than or equal to (5.5+/-1.9) X 10(-15) s/s, after correcting for proper motion. Our results are consistent with previous (P) over dot values for this mode and an improvement over them due to the larger time-base. The characteristic stability timescale implied for the pulsation period is \P/(P) over dot\greater than or equal to1. 2 Gyr, comparable to the theoretical cooling timescale for the star. Our current stability limit for the period 213.132605 s is only slightly less than the present measurement for G 117-B15A for the period 215.2 s, another DAV, establishing this mode in ZZ Ceti as the second most stable optical clock known, more stable than atomic clocks and most pulsars.
KeywordStars : White Dwarfs : Individual : Zz Cet r 548 Stars : Pulsations Evolution
Indexed BySCI ; ISTP
WOS IDWOS:000184698800010
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Cited Times:5[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Affiliation1.Univ Texas, Austin, TX 78712 USA
2.McDonald Observ, Ft Davis, TX 79734 USA
3.Univ Fed Rio Grande do Sul, Inst Fis, BR-91501970 Porto Alegre, RS, Brazil
4.Apache Point Observ, Sunspot, NM 88349 USA
5.Los Alamos Natl Lab, Los Alamos, NM 87545 USA
6.Univ British Columbia, Dept Phys & Astron, Vancouver, BC V6T 1Z4, Canada
7.Natl Astron Observ, Hilo, HI 96720 USA
8.Victoria Univ Wellington, Sch Chem & Phys Sci, Wellington, New Zealand
9.Australian Natl Univ, Res Sch Astron & Astrophys, Weston, ACT 2611, Australia
10.Perth Observ Walnut, Bickley, WA 6076, Australia
11.Natl Astron Observ, Beijing Astron Observ, Beijing 100012, Peoples R China
12.Natl Astron Observ, Joint Lab Opt Astron, Beijing 100012, Peoples R China
13.Uttar Pradesh State Observ, Naini Tal, India
14.Indian Space Res Org, Tech Phys Div, ISRO, Satellite Ctr, Bangalore 560017, Karnataka, India
15.Tel Aviv Univ, Sch Phys & Astron, IL-69978 Tel Aviv, Israel
16.Tel Aviv Univ, Wise Observ, IL-69978 Tel Aviv, Israel
17.Inst Theoret Phys & Astron, LT-2600 Vilnius, Lithuania
18.Vilnius Univ Observ, LT-2009 Vilnius, Lithuania
19.S African Astron Observ, ZA-7935 Cape Town, South Africa
20.Univ Cent Lancashire, Ctr Astrophys, Preston PR1 2HE, Lancs, England
21.Univ Cape Town, Dept Astron, ZA-7701 Rondebosch, South Africa
22.Polish Acad Sci, N Copernicus Astron Ctr, PL-00716 Warsaw, Poland
23.Jagiellonian Univ, Astron Observ, PL-30244 Krakow, Poland
24.Cracow Pedagog Univ, Mt Suhora Observ, PL-30084 Krakow, Poland
25.Univ Tromso, Inst Fys, N-9037 Tromso, Norway
26.Osserv Astron Capodimonte, I-80131 Naples, Italy
27.Osservatorio Astron Bologna, Bologna, Italy
28.Observ Midi Pyrenees, F-31400 Toulouse, France
29.Observ Paris, F-92195 Meudon, France
30.Univ A Coruna, Dept Ciencias Naut Terra, La Coruna, Spain
31.Univ Vigo, Dept Fis Aplicada, Fac Ciencias, Vigo 36200, Spain
32.Univ La Laguna, Dept Astrophys, E-38207 San Cristobal la Laguna, Spain
33.Univ Porto, Ctr Astrophys, P-4150 Oporto, Portugal
34.Inst Super Maia, P-4475690 Sao Pedro Avioso, Portugal
35.Aarhus Univ, Inst Phys & Astron, Theoret Astrophys Ctr, DK-8000 Aarhus C, Denmark
36.Univ Fed Santa Catarina, Dept Fis, BR-88040900 Florianopolis, SC, Brazil
37.Univ Caxias Do Sul, Dept Quim & Fis, BR-95001970 Caixas Do Sul, RS, Brazil
38.Univ Montreal, Dept Phys, Montreal, PQ H3C 3J7, Canada
39.Space Telescope Sci Inst, Baltimore, MD 21218 USA
40.Penn State Univ, Dept Astron & Astrophys, University Pk, PA 16802 USA
41.Florida Inst Technol, Dept Phys & Space Sci, Melbourne, FL 32901 USA
42.Florida Inst Technol, SARA Observ, Melbourne, FL 32901 USA
43.Middle Tennessee State Univ, Dept Phys & Astron, Murfreesboro, TN 37132 USA
44.Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA
45.SW Missouri State Univ, Springfield, MO 65807 USA
46.SW Univ, Informat Technol Serv, Georgetown, TX USA
Recommended Citation
GB/T 7714
Mukadam, AS,Kepler, SO,Winget, DE,et al. Constraining the evolution of ZZ Ceti[J]. BALTIC ASTRONOMY,2003,12(1):71-103.
APA Mukadam, AS.,Kepler, SO.,Winget, DE.,Nather, RE.,Kilic, M.,...&Watson, TK.(2003).Constraining the evolution of ZZ Ceti.BALTIC ASTRONOMY,12(1),71-103.
MLA Mukadam, AS,et al."Constraining the evolution of ZZ Ceti".BALTIC ASTRONOMY 12.1(2003):71-103.
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