Reference : Multisite Observations of delta Scuti Stars 7 Aql and 8 Aql (a New delta Scuti Variab...
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Space science, astronomy & astrophysics
http://hdl.handle.net/2268/75443
Multisite Observations of delta Scuti Stars 7 Aql and 8 Aql (a New delta Scuti Variable): The Twelfth STEPHI Campaign in 2003
English
Fox Machado, L. [Observatorio Astronómico Nacional, Instituto de Astronomía, Universidad Nacional Autónoma de México, A.P. 877, Ensenada, BC 22860, Mexico.]
Michel, Eric [ > > ]
Pérez Hernández, F. [Instituto de Astrofísica de Canarias, E-38205 La Laguna, Tenerife, Spain.; Departamento de Astrofísica, Universidad de La Laguna, E-38205 La Laguna, Tenerife, Spain.]
Peña, J. H. [Instituto de Astronomía, Universidad Nacional Autónoma de México, A.P. 70-264, México, DF 04510, Mexico.]
Li, Z. P. [Beijing Observatory, Chinese Academy of Sciences, Beijing, China.]
Chevreton, M. [Observatoire de Paris, LESIA, UMR 8109, F-92195 Meudon, France.]
Belmonte, J. A. [Instituto de Astrofísica de Canarias, E-38205 La Laguna, Tenerife, Spain.]
Álvarez, M. [Observatorio Astronómico Nacional, Instituto de Astronomía, Universidad Nacional Autónoma de México, A.P. 877, Ensenada, BC 22860, Mexico.]
Parrao, L. [Instituto de Astronomía, Universidad Nacional Autónoma de México, A.P. 70-264, México, DF 04510, Mexico.]
Dupret, Marc-Antoine [Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Astrophysique stellaire théorique >]
Pau, S. [Observatoire de Paris, LESIA, UMR 8109, F-92195 Meudon, France.]
Fernandez, A. [Observatoire de Paris, LESIA, UMR 8109, F-92195 Meudon, France.]
Michel, J. [ > > ]
Michel, R. [ > > ]
Pani, A. [Observatorio Astronómico Nacional, Instituto de Astronomía, Universidad Nacional Autónoma de México, A.P. 877, Ensenada, BC 22860, Mexico.]
1-Aug-2007
Astronomical Journal
Univ Chicago Press
134
860-866
Yes (verified by ORBi)
International
0004-6256
Chicago
IL
[en] Stars: Variables: delta Scuti ; stars: individual (HD 174532) ; stars: individual (HD 174589) ; Stars: Oscillations ; Techniques: Photometric
[en] We present an analysis of the pulsation behavior of the delta Scuti stars 7 Aql (HD 174532) and 8 Aql (HD 174589), a new variable star, observed in the framework of the STEPHI XII campaign during 2003 June and July; 183 hr of high-precision photometry were acquired by using four-channel photometers at three sites on three continents during 21 days. The light curves and amplitude spectra were obtained following a classical scheme of multichannel photometry. Observations in different filters were also obtained and analyzed. Six and three frequencies have been unambiguously detected above a 99% confidence level in the range 190-300 muHz and 100-145 muHz in 7 Aql and 8 Aql, respectively. A comparison of observed and theoretical frequencies shows that 7 Aql and 8 Aql may oscillate with p-modes of low radial orders, typical among delta Scuti stars. In terms of radial oscillations the range of 8 Aql goes from n=1 to 3, while for 7 Aql the range spans from n=4 to 7. Nonradial oscillations have to be present in both stars as well. The expected range of excited modes according to a nonadiabatic analysis goes from n=1 to 6 in both stars.
http://hdl.handle.net/2268/75443
10.1086/520062
http://adsabs.harvard.edu/abs/2007AJ....134..860F
http://de.arxiv.org/abs/0706.0576

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