PNN NGC 246: A Complex Photometric Behaviour That Requires Wet
We present a study over three single-site campaigns to investigate the photometric behaviour of the PNN NGC 246. We observed this object in 2000 and 2001. The analysis of the light curves indicates complex and variable temporal spectra. Using wavelet analysis we have found evidences for changes on t...
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| Format: | Article |
| Language: | English |
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De Gruyter
2003-03-01
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| Series: | Open Astronomy |
| Subjects: | |
| Online Access: | http://www.degruyter.com/view/j/astro.2003.12.issue-1/astro-2017-0038/astro-2017-0038.xml?format=INT |
| _version_ | 1811270223015182336 |
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| author | Pérez J. M. González Solheim J.-E. Dorokhova T. N. Dorokhov N. I. |
| author_facet | Pérez J. M. González Solheim J.-E. Dorokhova T. N. Dorokhov N. I. |
| author_sort | Pérez J. M. González |
| collection | DOAJ |
| description | We present a study over three single-site campaigns to investigate the photometric behaviour of the PNN NGC 246. We observed this object in 2000 and 2001. The analysis of the light curves indicates complex and variable temporal spectra. Using wavelet analysis we have found evidences for changes on time scales of hours in the 2000 dataset. The temporal spectra obtained during 2001 are quite different from the results of the previous year. The modulations in the light curve are more noticeable and the temporal spectra present a higher number of modulation frequencies. One peculiar characteristic is the presence of a variable harmonic structure related to one of these modulation frequencies. This complex photometric behaviour may be explained by a more complicated unresolved combination of modulation frequencies, but more likely due to a combination of pulsations of the star plus modulations related to interaction with a close companion, maybe indicating a disc. However, these characteristics cannot be confirmed from single site observations. The complex and variable behaviour of NGC 246 needs the WET co-operation in order to completely resolve its light curve. |
| first_indexed | 2024-04-12T21:57:03Z |
| format | Article |
| id | doaj.art-20e3d752a763423aaf26ffe15c2955a7 |
| institution | Directory Open Access Journal |
| issn | 2543-6376 |
| language | English |
| last_indexed | 2024-04-12T21:57:03Z |
| publishDate | 2003-03-01 |
| publisher | De Gruyter |
| record_format | Article |
| series | Open Astronomy |
| spelling | doaj.art-20e3d752a763423aaf26ffe15c2955a72022-12-22T03:15:15ZengDe GruyterOpen Astronomy2543-63762003-03-0112112513810.1515/astro-2017-0038astro-2017-0038PNN NGC 246: A Complex Photometric Behaviour That Requires WetPérez J. M. González0Solheim J.-E.1Dorokhova T. N.2Dorokhov N. I.3Institutt for Fysikk, Universitetet i Tromsø, N-9037 Tromsø, NorwayInstitutt for Fysikk, Universitetet i Tromsø, N-9037 Tromsø, NorwayAstronomical Observatory of Odessa National University, Park Shevchenko 65014 Odessa, UkraineAstronomical Observatory of Odessa National University, Park Shevchenko 65014 Odessa, UkraineWe present a study over three single-site campaigns to investigate the photometric behaviour of the PNN NGC 246. We observed this object in 2000 and 2001. The analysis of the light curves indicates complex and variable temporal spectra. Using wavelet analysis we have found evidences for changes on time scales of hours in the 2000 dataset. The temporal spectra obtained during 2001 are quite different from the results of the previous year. The modulations in the light curve are more noticeable and the temporal spectra present a higher number of modulation frequencies. One peculiar characteristic is the presence of a variable harmonic structure related to one of these modulation frequencies. This complex photometric behaviour may be explained by a more complicated unresolved combination of modulation frequencies, but more likely due to a combination of pulsations of the star plus modulations related to interaction with a close companion, maybe indicating a disc. However, these characteristics cannot be confirmed from single site observations. The complex and variable behaviour of NGC 246 needs the WET co-operation in order to completely resolve its light curve.http://www.degruyter.com/view/j/astro.2003.12.issue-1/astro-2017-0038/astro-2017-0038.xml?format=INTstarspulsating PNN - starsindividualNGC 246 |
| spellingShingle | Pérez J. M. González Solheim J.-E. Dorokhova T. N. Dorokhov N. I. PNN NGC 246: A Complex Photometric Behaviour That Requires Wet Open Astronomy stars pulsating PNN - stars individual NGC 246 |
| title | PNN NGC 246: A Complex Photometric Behaviour That Requires Wet |
| title_full | PNN NGC 246: A Complex Photometric Behaviour That Requires Wet |
| title_fullStr | PNN NGC 246: A Complex Photometric Behaviour That Requires Wet |
| title_full_unstemmed | PNN NGC 246: A Complex Photometric Behaviour That Requires Wet |
| title_short | PNN NGC 246: A Complex Photometric Behaviour That Requires Wet |
| title_sort | pnn ngc 246 a complex photometric behaviour that requires wet |
| topic | stars pulsating PNN - stars individual NGC 246 |
| url | http://www.degruyter.com/view/j/astro.2003.12.issue-1/astro-2017-0038/astro-2017-0038.xml?format=INT |
| work_keys_str_mv | AT perezjmgonzalez pnnngc246acomplexphotometricbehaviourthatrequireswet AT solheimje pnnngc246acomplexphotometricbehaviourthatrequireswet AT dorokhovatn pnnngc246acomplexphotometricbehaviourthatrequireswet AT dorokhovni pnnngc246acomplexphotometricbehaviourthatrequireswet |