A multisite photometric campaign on the pre-main-sequence<i>δ</i> Scuti pulsator IP Persei

Ripepi, V.; Bernabei, S.; Marconi, M.; Palla, F.; Ferro, A. Arellano; Bonanno, A.; Ferrara, P.; Frasca, A.; Jiang, Xiaojun; Kim, S.-L.; Marinoni, S.; Mignemi, Giuseppe; Monteiro, M. J. P. F. G.; Oswalt, Terry D.; Reegen, P.; Janulis, R.; Rodrı́guez, E.; Rolland, A.; Ruoppo, A.; Terranegra, L.; Zwintz, K.

doi:10.1051/0004-6361:20054164

Cited by 26 publications

(27 citation statements)

References 33 publications

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“…Since the work by MP98, many new PMS δ Scuti candidates have been observed and the current census of known or suspected candidates includes about 30 stars (see e.g., Ripepi et al 2006a;Zwintz 2008). However, only a few of these have been studied in detail (e.g., Ripepi et al 2003;Böhm et al 2004;Ripepi et al 2006b). Thus, the overall properties of this class of variable stars remain poorly determined.…”

Section: Introductionmentioning

confidence: 99%

“…Prior to space data, which will become progressively available from the MOST, COROT and possibly KEPLER satellites, the only way that we can satisfy these requirements is to carry out multi-site observations on promising asteroseismological targets, i.e., stars that are multi-periodic. Starting in 2003, our group has applied the multi-site technique to two targets, V351 Ori (Ripepi et al 2003) and IP Per (Ripepi et al 2006b). The observational results obtained for these stars have been interpreted using non-radial adiabatic pulsation theory (see Ruoppo et al 2007).…”

Section: Introductionmentioning

confidence: 99%

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Multi-site photometry of the pulsating Herbig Ae star V346 Ori

Bernabei

Ripepi

Ruoppo

et al. 2009

A&A

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Context. The study of pulsation in pre-main-sequence intermediate-mass stars represents an important tool for deriving information about fundamental stellar parameters and internal structure, as well as testing theoretical models. Interest in this class of variable stars has increased significantly during the last decade and about 30 members are presently known in the literature. Aims. After constructing the frequency spectrum of oscillations in V346 Ori, we apply asteroseismic tools to these data to estimate the intrinsic parameters (mass, luminosity, effective temperature) of V346 Ori and obtain information about its internal structure. Methods. CCD time-series photometry in the Johnson V filter was obtained for a total of 145.7 h of observations distributed over 36 nights. The resulting light curves were subjected to a detailed frequency analysis using updated numerical techniques. Photometric and spectroscopic data were also acquired to determine reliable estimates of the stellar properties. Results. We identified 13 oscillation frequencies, 6 of which with higher significance. These were compared with the predictions of non-radial adiabatic models. The resulting best-fit model corresponds to a mass of 2.1 ± 0.2 M , luminosity log L/L = 1.37 +0.11 −0.13 , and effective temperature 7300 ± 200 K. These values are marginally consistent with the association of V346 Ori to Orion OB1a. Alternatively, V346 Ori could be placed at a slightly larger distance than previously estimated.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Multi-site photometry of the pulsating Herbig Ae star V346 Ori

Bernabei

Ripepi

Ruoppo

et al. 2009

A&A

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“…Another case that we may also consider as a possible preliminary application is IP Per, which has been the target of a recent multisite campaign (Ripepi et al 2006a). The observed frequencies are listed in Table 5 while in Fig.…”

Section: The Case Of Ip Permentioning

confidence: 99%

“…However, only a few stars have been studied in detail, so that the overall properties of this class of variables are still poorly determined. In this context our group has started a systematic monitoring program of Herbig Ae stars with spectral types from A to F2-3 with the following aims: 1) to identify the largest number of pulsating objects in order to observationally determine the boundaries of the instability strip for PMS δ Scuti pulsation; 2) to study in detail through multisite campaigns selected objects showing multiperiodicity (see Marconi et al 2001;Ripepi et al 2002Ripepi et al , 2003Ripepi et al , 2006aPinheiro et al 2003;Bernabei et al 2004) which are the best potential candidates for asteroseismology.…”

Section: Introductionmentioning

confidence: 99%

A theoretical approach for the interpretation of pulsating PMS intermediate-mass stars

Ruoppo

Marconi

Marques

et al. 2007

A&A

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Context. The investigation of the pulsation properties of pre-main-sequence intermediate-mass stars is a promising tool to evaluate the intrinsic properties of these stars and to constrain current evolutionary models. Many new candidates of this class have been discovered during the last decade and very accurate data are expected from space observations obtained for example with the CoRoT satellite. Aims. In this context we aim at developing a theoretical approach for the interpretation of observed frequencies, both from the already available ground-based observations and from the future more accurate and extensive CoRoT results. Methods. To this purpose we have started a project devoted to the computations of fine and extensive grids of asteroseismic models of intermediate mass pre-main-sequence stars. The obtained frequencies are used to derive an analytical relation between the large frequency separation and the stellar luminosity and effective temperature and to develop a tool to compare theory and observations in the echelle diagram. Results. The predictive capabilities of the proposed method are verified through the application to two test stars. As a second step, we apply the procedure to two true observations from multisite campaigns and we are able to constrain their stellar parameters, in particular the mass, in spite of the small number of frequencies. Conclusions. We expect that with a significantly higher number of frequencies both the stellar mass and age could be constrained and, at the same time, the physics of the models could be tested.

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“…The first δ Scuti-type pulsations were found in PMS stars among members of the open cluster NGC 2264 [2]. Until now, about 30 PMS pulsating stars are known in open clusters [18,17,24,23,25], as well as in the field population of Herbig Ae stars [1,3,4,11,12,13,14,16,19,20,21].…”

Section: Introductionmentioning

confidence: 99%

Pulsating stars in the region of Carina Nebula

Stȩślicki

2008

J. Phys.: Conf. Ser.

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Abstract. We present the results of a search for pulsating stars in the region of Carina Nebula which includes three very young open clusters: Trumpler 14, 15 and 16. The search was made with the Wide Field Imager (WFI) on the MPG/ESO 2.2-m telescope in La Silla (Chile). In total, about 16,000 stars have been analyzed using classical Fourier techniques. We found over 20 pulsating δ-Scuti type stars in this region. Most of them are probable members of open clusters at the pre-main sequence evolutionary stage.

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A multisite photometric campaign on the pre-main-sequenceδ Scuti pulsator IP Persei

Cited by 26 publications

References 33 publications

Multi-site photometry of the pulsating Herbig Ae star V346 Ori

Multi-site photometry of the pulsating Herbig Ae star V346 Ori

A theoretical approach for the interpretation of pulsating PMS intermediate-mass stars

Pulsating stars in the region of Carina Nebula

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