• Yushchenko, A.V. (Odessa Astronomical Observatory, Odessa National University) ;
  • Dorokhova, T.N. (Odessa Astronomical Observatory, Odessa National University) ;
  • Gopka, V.F. (Odessa Astronomical Observatory, Odessa National University) ;
  • Kim, Chul-Hee (Division of Science Education, Institute of Fusion Science, Chonbuk National University) ;
  • Lee, B.C. (Korea Astronomy and Space Science Institute) ;
  • Yushchenko, V.A. (Dep. of Astronomy, Odessa National University) ;
  • Doikov, D.N. (Dep. Of Common Science, Odessa National Maritime University)
  • Received : 2010.04.19
  • Accepted : 2010.05.20
  • Published : 2010.06.30


We investigate ${\rho}$ Pup using the high resolution spectral observations taken from the VLT archive and observations at a 1.8m-Korean telescope with BOES spectrograph. The atmospheric parameters are determined using the iron-line abundance analysis. We derive an effective temperature value of $T_{eff}=6890{\pm}250K$, surface gravity of log g=$3.28{\pm}0.3$ dex, microturbulent velocity of ${\upsilon}_{micro}=4.1{\pm}0.4km\;s^{-1}$, and the iron abundance of log N=$7.82{\pm}0.15$. The projected rotational velocity of the star is close to ${\upsilon}$ sin i=3.5km $s^{-1}$. Asymmetric line profiles in the observed spectra and variation of this asymmetry with time show that both strong radial pulsation and weak non-radial pulsations are present in ${\rho}$ Pup.


  1. Aerts, C., de Pauw, M., & Waelkens, C. 1992, Mode Identification of Pulsating Stars from Line Profile Variations with the Moment Method. An Example - The Beta Cephei Star Delta Ceti, A&A, 266, 294
  2. Aerts, C. 1996, Mode Identification of Pulsating Stars from Line-Profile Variations with the Moment Method: A More Accurate Discriminant, A&A 314, 115
  3. Antoci, V., Nesvacil, N., & Handler, G. 2008, Rho Puppis: Some Spectroscopic Results or 'The Taming of Rho Puppis', Comm. in Astroseimology, 157, 286
  4. Antoci, V., Handler, G., Carrier, F., Grundahl, F., Matthews, J. M., Hareter, M., Kuschnig, R., & Houdec, G. 2009, The Delta Scuti Star Rho Puppis: The Perfect Target to Probe the Theory Predicting Solar-Like Oscillations in Cool Delta Scuti Stars, AIP Conf. Ser. 1170, 440
  5. Asplund, M., Grevesse, N., Sauval, A. J., & Scott, P. 2009, The Chemical Composition of the Sun, Annual Reviews of Astronomy and Astrophysics, 47, 481
  6. Baglin, A., Breger, M., Chevalier, C. et al. 1973, Delta Scuti Stars, A&A, 23, 221
  7. Bagnul, S. et al. 2003, The UVES Paranal Observatory Project: A Library of High-Resolution Spectra of Stars across the Hertzsprung-Russell Diagram, Messenger, 114, 10
  8. Berdyugina, S. V., Telting, J. H., & Korhonen, H. 2003, Surface Imaging of Stellar Non-Radial Pulsations. I. Inversions of Simulated Data, A&A, 406, 273
  9. Bessell, M. S. 1967, A Different Interpretation of rho Puppis, ApJ, 149, L67
  10. Bessell, M. S. 1969, An Investigation of Short-Period Variable Stars. I. The Delta Scuti Stars, ApJS, 18, 167
  11. Biemont, J., Palmeri, P., & Quinet, P. 2002, Database of Rare Earths At Mons University
  12. Breger, M. 1970, An Investigation of Short-Period Variable Stars. I. The Delta Scuti Stars, ApJ, 162, 597
  13. Burkhart, C., & Coupry, F. M. 1991, The A and Am-Fm Stars. I - The Abundances of Li, AI, Si, and Fe, A&A, 249, 205
  14. Burkhart, C., Coupry, F. M., Faraqqiana, R., & Gerbaldi, M. 2005, The field Am and PuppisLike Stars: Lithium and Heavier Elements, A&A, 429, 1043
  15. Campos, A. J., & Smith, M. A. 1980, Pulsational ModeTyping in Line Profile Variables. II - rho Pup pis and Delta Scuti, ApJ, 238, 667
  16. Cenarro, A. J., Peletier, R F., Snchez-Blquez, P., Selam, S. O., Toloba, E., Cardiel, N., Falcon-Barroso, J., Gorgas, J., Jimenez-Vicente, J., & Vazdekis, A. 2007, MediumResolution Isaac Newton Telescope Library of Empirical Spectra -II. The Stellar Atmospheric Parameters, MNRAS, 374, 664
  17. Cousins, A. W. J. 1951, Bright Variables Stars in the Southern Hemisphere, Monthly Notes of the Astronomical Society of South Africa, 10, 60
  18. Dall, T. H., & Frandsen, S. 2002, Mode Characterisation in Delta Scuti Stars. I. rho Pup, GN And, V1208 Aql and AV Cet, A&A, 386, 964
  19. Danziger, I. J., & Dickens, R J. 1967, Spectrophotometry of New Short-Period Variable Stars, ApJ, 149, 55
  20. Dellbouille, L., Rolland, G., & Neven, L. 1973, Photometric Atlas of the Solar Spectrum from A 3000 to A 10000, (Institute de Astrophisique de Universitete de Liege).
  21. Fuhr, J. R, & Wiese, W. L. 2006, New Critical Compilations of Atomic Transition Probabilities for Neutral and Singly Ionized Carbon, Nitrogen, and Iron, J. Phys. Chem. Ref. Data, 35, 1669
  22. Gopka, V., Yushchenko, A., Kim, C., Lambert, D., Rostopchin, S., Kim, S.-L., Jeon, Y-B., Dorokhova, T., Tarasov, A., & Chernysheva, I. 2007, Chemical Composition of Several Pulsating Variable Stars of the Boo and Set Types, ASP Conf. Ser., 362, 249
  23. Gopka, V. F., Yushchenko, A. V., Mishenina, T. V., Kim, C., Musaev, F. A., & Bondar, A. V. 2004, Atmospheric Chemical Composition of the Halo Star HD 221170 from a Synthetic-Spectrum Analysis, Astronomy Reports, 48, 577
  24. Gray, D. F. 2009, The Third Signature of Stellar Granulation, ApJ, 697, 1032
  25. Greenstein, J. L. 1948, Spectrophotometry of the F Stars and of Ursae Majoris. I., ApJ, 107, 151
  26. Grevesse, N., & Sauval , A. J. 1999, The Solar Abundance of Iron and the Photospheric Model, A&A, 347, 348
  27. Hui-Bon-Hua, A. 2000, Metal Abundances of Field A and Am Stars, A&AS, 144, 203
  28. Hirata, R, & Horaguchi, T. 1995, SIMBAD Catalog VI/69
  29. Kunzli, M., North, P., Kurucz, R L., & Nicolet, B. 1997, A Calibration of Geneva Photometry for B to G Stars in Terms of Teff, log G and [M/H]' A&AS, 122, 51
  30. Kurtz, D. W. 1976, Metallicism and Pulsation: An Analysis of the Delta Delphini Stars, ApJS, 32, 651
  31. Kurtz, D. W. 1998, Non-Turbulent Pulsation: Metallicism in Pulsating Stars, ASPC, 135, 420
  32. Kurtz, D. W. 2000, Pulsation of Chemically Peculiar and Pre-Main Sequence Stars in the Scuti Instability Strip, ASPC, 210, 2
  33. Kurtz, D. W., Garrison, R F., Koen, C. et al. 1995, Metallicism and Pulsation: The Discovery of Large-Amplitude Delta Scuti Pulsation in a High-Metallicity rho Puppis Star, HD 40765, MNRAS, 276, 199
  34. Kurucz, R.L. 1993, CDROMs No. 1-18 (Cambridge, MA, Smithsonian Astrophys. Obs.)
  35. Kurucz, R. L. 1995, CDROM No. 23 (Cambridge, MA, Smithsonian Astrophys. Obs.)
  36. Mathias, P., Gillet, D., Aerts, C., & Breitfellner, M. G. 1997, A Spectroscopic Study of the Delta Scuti Star rho Puppis, A&A, 327, 1077
  37. Michaud, G. 1970, Diffusion Processes in Peculiar A Stars, ApJ, 160, 641
  38. Michaud, G., Richer, J., & Richard, O. 2008, Abundance Anomalies in Horizontal Branch Stars and Atomic Diffusion, ApJ, 675, 1223
  39. Moon, T., & van Antverpen, C. 2009, Period Changes in $\delta$ Scuti Stars: $\rho$ Puppis, JAAVSO, 37, 3
  40. Morton, D. C. 2000, Atomic Data for Resonance Absorption Lines. II. Wavelengths Longward of the Lyman Limit for Heavy Elements, ApJS, 130, 403
  41. Netopil, M., Paunzen, E., Maitzen, H. M., North, P., & Hubrig, S. 2008, Chemically Peculiar Stars and Their Temperature Calibration, A&A, 491, 545
  42. Oke, J. B., & Greenstein, J. L. 1954, The Rotational Velocities of - - and G-Type Giant Stars., ApJ, 120, 384
  43. Piskunov, N., Kupka, F., Ryabchikova, T., Weiss, W., & Jeffery, C. 1995, VALD: The Vienna Atomic Line Data Base., A&AS, 112, 525
  44. Ramirez, I., & Melendez, J. 2005, The Effective Temperature Scale of FGK Stars. I. Determination of Temperatures and Angular Diameters with the Infrared Flux Method, ApJ, 626, 446
  45. Reiners, A., & Royer, F. 2004, Altair's Inclination from Line Profile Analysis, A&A, 428, 199
  46. Rodriguez, E., & Breger, M. 2001, Delta Scuti and Related Stars: Analysis of the R00 Catalogue, A&A, 366, 178
  47. Tody, D. 1986, 'The IRAF Data Reduction and Analysis System' in Proc. SPIE Instrumentation in Astronomy VI, ed. D.L. Crawford, 627, 733
  48. Turcotte, S., Richer, J., Michaud, G., & ChristensenDalsgaard, J. 2000, The Effect of Diffusion on Pulsations of Stars on the Upper Main Sequence - Scuti andMetallic A Stars, A&A, 360, 603
  49. Venn, K. A., & Lambert, D. L. 2008, ApJ, 677, 572
  50. Yang, S., Walker, G. A. H., & Bennett, P. 1987, The Spectral Variations of the Delta Scuti Star rho Puppis, PASP, 99, 425
  51. Yushchenko, A. V. 1998, URAN: A Software System for the Analysis of Stellar Spectra, Proceedings of the 20th Stellar Conference of the Czech and Slovak Astronomical Institutes, Ed. by J. Dusek (ISBN 80-85882-08-6, Brno), p. 201
  52. Yushchenko, A. V., Gopka, V. F., Khokhlova, V. L., Musaev, F. A., & Bikmaev, I. F. 1999, Astronomy Letters 25, 453
  53. Yushchenko, A., Gopka, V., Kim, C., Musaev, F., Kang, Y. W., Kovtyukh, V., & Soubiran C. 2005, The Chemical Composition of Scuti, MNRAS, 359, 865

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