Solar-like oscillations in Red Giants: Status & Perspectives with SIAMOIS Caroline Barban LESIA/UFE...
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Transcript of Solar-like oscillations in Red Giants: Status & Perspectives with SIAMOIS Caroline Barban LESIA/UFE...
![Page 1: Solar-like oscillations in Red Giants: Status & Perspectives with SIAMOIS Caroline Barban LESIA/UFE Observatoire de Paris.](https://reader035.fdocuments.us/reader035/viewer/2022062722/56649f305503460f94c4b43f/html5/thumbnails/1.jpg)
Solar-like oscillations in Red
Giants:Status & Perspectives
with SIAMOIS
Caroline BarbanLESIA/UFE
Observatoire de Paris
![Page 2: Solar-like oscillations in Red Giants: Status & Perspectives with SIAMOIS Caroline Barban LESIA/UFE Observatoire de Paris.](https://reader035.fdocuments.us/reader035/viewer/2022062722/56649f305503460f94c4b43f/html5/thumbnails/2.jpg)
2
http://www.bramboroson.com/astro/images/hrdiagram.jpg
Red giant solar-like oscillations
Amplitude > 10 ppm or m/sPeriod > hours
Few modes (10’s)Only radial modes (?)
![Page 3: Solar-like oscillations in Red Giants: Status & Perspectives with SIAMOIS Caroline Barban LESIA/UFE Observatoire de Paris.](https://reader035.fdocuments.us/reader035/viewer/2022062722/56649f305503460f94c4b43f/html5/thumbnails/3.jpg)
Solar-like oscillations detectionsRed giants
![Page 4: Solar-like oscillations in Red Giants: Status & Perspectives with SIAMOIS Caroline Barban LESIA/UFE Observatoire de Paris.](https://reader035.fdocuments.us/reader035/viewer/2022062722/56649f305503460f94c4b43f/html5/thumbnails/4.jpg)
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Solar-like oscillations in red giants
UMa, K0III WIRE, 37 days 1.8 - 44 HzA~1-4 105 ppm
Hya, K3II-III
WIRE, 19 days4 - 7 Hz
A~1000 ppm
FEROS over 17 days 243 spectra50 - 120 Hz
<0>~8 HzArcturus, K1.5III
Buzasi et al. 2000Setiawan et al. 2005
Retter et al. 2003
0 5000frequency (Hz)
0 50
![Page 5: Solar-like oscillations in Red Giants: Status & Perspectives with SIAMOIS Caroline Barban LESIA/UFE Observatoire de Paris.](https://reader035.fdocuments.us/reader035/viewer/2022062722/56649f305503460f94c4b43f/html5/thumbnails/5.jpg)
http
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smc.
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t.gi
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Hya (G7III,mv=3.54)
50 - 130 HzA~2 m/s
CORALIE, over 1 month433 Radial Velocity data
Autocorrelation
<0> ~ 7 Hz
3.07 M
3.15 M
2.93 M
Frandsen et al. 2002
![Page 6: Solar-like oscillations in Red Giants: Status & Perspectives with SIAMOIS Caroline Barban LESIA/UFE Observatoire de Paris.](https://reader035.fdocuments.us/reader035/viewer/2022062722/56649f305503460f94c4b43f/html5/thumbnails/6.jpg)
http
://h
omep
age.
smc.
edu/
balm
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on/im
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ro%
201a
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t_m
s_lo
w_m
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red_
gian
t.gi
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Coralie/1.2mLa silla, Chile
Elodie/1.93m OHP, France
collaboration Belgique-Suisse-France
Solar-like oscillations
in Oph, Ser
Over 74 nights, 635 RV data
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Ser (K0III,mv=3.26)
80 - 170 HzA~2 m/s
<0> ~ 8 Hz
?-W1
2?W1
Barban et al., SOGO 2004
Over 74 nights, 1062 RV data
Autocorrelation
![Page 8: Solar-like oscillations in Red Giants: Status & Perspectives with SIAMOIS Caroline Barban LESIA/UFE Observatoire de Paris.](https://reader035.fdocuments.us/reader035/viewer/2022062722/56649f305503460f94c4b43f/html5/thumbnails/8.jpg)
http
://h
omep
age.
smc.
edu/
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on/im
ages
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ro%
201a
/pos
t_m
s_lo
w_m
ass/
red_
gian
t.gi
f Oph (G9.5III,mv=3.24)
Autocorrelation
W1
2W1-2 W1-
W1 -2-W1 3-W1
OR
Over 74 nights, 635 RV data
30 - 90 HzA~3 m/s
<0> ~ 5 or 7 Hz
<0> ~ 5 Hz
<0> ~ 7 Hz
De Ridder et al. 2006
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Red giant observations
with MOST
![Page 10: Solar-like oscillations in Red Giants: Status & Perspectives with SIAMOIS Caroline Barban LESIA/UFE Observatoire de Paris.](https://reader035.fdocuments.us/reader035/viewer/2022062722/56649f305503460f94c4b43f/html5/thumbnails/10.jpg)
Oph (G9.5III,mv=3.24)window
Poribte- Poribte
S-S -S+Poribte S+Poribt
-Poribte Poribte
duty cycle ~ 50%28 days
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Autocorrelation
<0> ~ 5 Hz
Oph (G9.5III,mv=3.24)
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Red giant observations with SIAMOISfrom DOME C
http://www.ifremer.fr/ifrtp/img/cartes/antarc.jpg
http://www.gdargaud.net/Photo/Panorama.html
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Possible targets with Siamois
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Siamois: red giant simulationwindow
window
Dome C, 90 daysduty cycle ~ 86 %
1 “ideal” site, 90 days8h/nightduty cycle ~ 33 %
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Dome C, 90 daysduty cycle ~ 86 %
1 “ideal” site, 90 days8h/nightduty cycle ~ 33 %
Siamois: red giant simulation
Autocorrelation W1
Autocorrelation
<0> 2<0>
![Page 16: Solar-like oscillations in Red Giants: Status & Perspectives with SIAMOIS Caroline Barban LESIA/UFE Observatoire de Paris.](https://reader035.fdocuments.us/reader035/viewer/2022062722/56649f305503460f94c4b43f/html5/thumbnails/16.jpg)
2
Why observing red giants
Hydrodynamical simulation (B. Freytag)
Samadi et al. 2005
Vm
ax/V
max
(L/M)1.5
(L/M)1.0
(L/M)0.8
(L/M)0.7