Helioseismology space and ground-based studies
We give a preliminary report on the observations of solar irradiance fluctuations with the DIFOS photometer aboard the Russian–Ukrainian satellite CORONAS-F launched in 2001. In addition, the parallel ground-based spectral observations (VTT, Tenerife) carried out with 20-day observing space campaign...
Збережено в:
| Опубліковано в: : | Кинематика и физика небесных тел |
|---|---|
| Дата: | 2005 |
| Автори: | , , , |
| Формат: | Стаття |
| Мова: | Англійська |
| Опубліковано: |
Головна астрономічна обсерваторія НАН України
2005
|
| Теми: | |
| Онлайн доступ: | https://nasplib.isofts.kiev.ua/handle/123456789/79620 |
| Теги: |
Додати тег
Немає тегів, Будьте першим, хто поставить тег для цього запису!
|
| Назва журналу: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Цитувати: | Helioseismology space and ground-based studies / R.I. Kostik, S.N. Osipov, E.V. Khomenko, N.I. Lebedev // Кинематика и физика небесных тел. — 2005. — Т. 21, № 5-додаток. — С. 138-140. — англ. |
Репозитарії
Digital Library of Periodicals of National Academy of Sciences of Ukraine| _version_ | 1860258062740226048 |
|---|---|
| author | Kostik, R.I. Osipov, S.N. Khomenko, E.V. Lebedev, N.I. |
| author_facet | Kostik, R.I. Osipov, S.N. Khomenko, E.V. Lebedev, N.I. |
| citation_txt | Helioseismology space and ground-based studies / R.I. Kostik, S.N. Osipov, E.V. Khomenko, N.I. Lebedev // Кинематика и физика небесных тел. — 2005. — Т. 21, № 5-додаток. — С. 138-140. — англ. |
| collection | DSpace DC |
| container_title | Кинематика и физика небесных тел |
| description | We give a preliminary report on the observations of solar irradiance fluctuations with the DIFOS photometer aboard the Russian–Ukrainian satellite CORONAS-F launched in 2001. In addition, the parallel ground-based spectral observations (VTT, Tenerife) carried out with 20-day observing space campaign are described.
|
| first_indexed | 2025-12-07T18:51:52Z |
| format | Article |
| fulltext |
HELIOSEISMOLOGY SPACE AND GROUND-BASED STUDIES
R. I. Kostik1, S. N. Osipov1, E. V. Khomenko1, N. I. Lebedev2
1Main Astronomical Observatory, NAS of Ukraine
27 Akademika Zabolotnoho Str., 03680 Kyiv, Ukraine
e-mail: kostik@mao.kiev.ua
2IZMIRAN, Russian Academy of Sciences, Troitsk, Russia
e-mail: lebedev@rssi.izmiran.ru
We give a preliminary report on the observations of solar irradiance fluctuations with the DIFOS
photometer aboard the Russian–Ukrainian satellite CORONAS-F launched in 2001. In addition,
the parallel ground-based spectral observations (VTT, Tenerife) carried out with 20-day observing
space campaign are described.
The Russian–Ukrainian satellite CORONAS-F was launched on July 31, 2001. The orbit is quasi-synchronous
with a height of 500–550 km and period of 95 min. The photometer DIFOS-F is among experiments aboard.
The design performs the continuous registration of solar irradiance within six spectral bands (range 350–1600nm)
with a high flux resolution. Real measurements of the solar irradiance started on August 22. The CORONAS-F
provides 20 days of continuous observing time without gaps by sunset. The observed data is being reduced now.
The sets of power spectra with moderate resolution had been obtained as a result of observations using the pho-
tometer DIFOS-F (Fig. 1). They demonstrate an increase of power with the photosphere height. The behaviour
of individual modes of oscillation has some differences (Fig. 2).
There was a possibility to coordinate the space observations aboard the CORONAS-F and ground-based
observations obtained with a high spatial resolution. The latter observations were carried out on August 20–26,
2001 simultaneously with the first 20-day observing campaign of the DIFOS-F photometer. The ground-based
instrument was the 70-cm German Vacuum Tower Telescope (VTT) of the Observatorio del Teide (Instituto
de Astrof́ısica de Canarias). The photospheric velocity and intensity oscillations of the different patterns of
the solar surface were recorded with a high spatial (0.5 arcsec) and temporal (9.3 s) resolution. We used time
series of CCD spectrograms in the range from 30 to 120 min. A CCD camera, with 1024×1024 photosensitive
elements, collected the spectral data. The observed images contained the Fe i λλ 532.4 nm and 639.3 nm spectral
lines with good height coverage from the low photosphere up to the temperature minimum region.
The similar data was obtained using the SOHO-MDI experiment. The study of acoustic waves propagation
through granulation patterns has been carried out. Both the ground-based and space data (Fig. 3) lead to
the following results:
• Strong oscillations occur well separated temporally and spatially.
• Oscillations above granules and intergranular lanes occur with different periods.
• On the average, the most energetic intensity oscillations occur above intergranular lanes; however, the situa-
tion is not so simple for the velocity oscillations. Namely, the powerful oscillations may occur above
granules as well.
• Velocity oscillations at the lower layers of the atmosphere lead oscillations at the upper layers in inter-
granular lanes. In granules the phase shift is nearly zero.
Acknowledgements. This work was partially supported by the Fundamental Research State Fund of the Mi-
nistry of Ukraine for Education and Science (project 02.07/00044) and by the INTAS project 00–00084.
c© R. I. Kostik, S. N. Osipov, E. V. Khomenko, N. I. Lebedev, 2004
138
350 nm
3.0 3.5 4.0 4.5
0
50
100
150
200
250
300
P
ow
er
, a
rb
.u
n
it
s
500 nm
3.0 3.5 4.0 4.5
0
10
20
30
40
50
P
ow
er
, a
rb
.u
n
it
s
650b nm
3.0 3.5 4.0 4.5
0
5
10
15
20
P
ow
er
, a
rb
.u
n
it
s
850b nm
3.0 3.5 4.0 4.5
0
5
10
15
P
ow
er
, a
rb
.u
n
it
s
1100 nm
3.0 3.5 4.0 4.5
Frequency, mHz
0
5
10
15
P
ow
er
, a
rb
.u
n
it
s
1500 nm
3.0 3.5 4.0 4.5
Frequency, mHz
0
1
2
3
4
5
6
P
ow
er
, a
rb
.u
n
it
s
Figure 1. Power spectra of brightness fluctuations of the Sun for six spectral channels
139
Figure 2. The power of individual modes in different channels of the photometer DIFOS-F
Figure 3. The power of velocity and intensity oscillations over granules and intergranular lanes from VTT data for two
periods (upper two panels) and from SOHO-MDI data for three periods (bottom two panels)
140
|
| id | nasplib_isofts_kiev_ua-123456789-79620 |
| institution | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| issn | 0233-7665 |
| language | English |
| last_indexed | 2025-12-07T18:51:52Z |
| publishDate | 2005 |
| publisher | Головна астрономічна обсерваторія НАН України |
| record_format | dspace |
| spelling | Kostik, R.I. Osipov, S.N. Khomenko, E.V. Lebedev, N.I. 2015-04-03T15:53:41Z 2015-04-03T15:53:41Z 2005 Helioseismology space and ground-based studies / R.I. Kostik, S.N. Osipov, E.V. Khomenko, N.I. Lebedev // Кинематика и физика небесных тел. — 2005. — Т. 21, № 5-додаток. — С. 138-140. — англ. 0233-7665 https://nasplib.isofts.kiev.ua/handle/123456789/79620 We give a preliminary report on the observations of solar irradiance fluctuations with the DIFOS photometer aboard the Russian–Ukrainian satellite CORONAS-F launched in 2001. In addition, the parallel ground-based spectral observations (VTT, Tenerife) carried out with 20-day observing space campaign are described. This work was partially supported by the Fundamental Research State Fund of the Ministry of Ukraine for Education and Science (project 02.07/00044) and by the INTAS project 00–00084. en Головна астрономічна обсерваторія НАН України Кинематика и физика небесных тел MS2: Physics of Solar Atmosphere Helioseismology space and ground-based studies Article published earlier |
| spellingShingle | Helioseismology space and ground-based studies Kostik, R.I. Osipov, S.N. Khomenko, E.V. Lebedev, N.I. MS2: Physics of Solar Atmosphere |
| title | Helioseismology space and ground-based studies |
| title_full | Helioseismology space and ground-based studies |
| title_fullStr | Helioseismology space and ground-based studies |
| title_full_unstemmed | Helioseismology space and ground-based studies |
| title_short | Helioseismology space and ground-based studies |
| title_sort | helioseismology space and ground-based studies |
| topic | MS2: Physics of Solar Atmosphere |
| topic_facet | MS2: Physics of Solar Atmosphere |
| url | https://nasplib.isofts.kiev.ua/handle/123456789/79620 |
| work_keys_str_mv | AT kostikri helioseismologyspaceandgroundbasedstudies AT osipovsn helioseismologyspaceandgroundbasedstudies AT khomenkoev helioseismologyspaceandgroundbasedstudies AT lebedevni helioseismologyspaceandgroundbasedstudies |