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The case ofEC13471-
1258.
Tiago Ribeiro,Stella Kafka,RaymundoBaptista
Outline
Introduction
Observations
Analysis
Photometry
Spectroscopy
References
WILD STARS IN THE OLD WEST II
Studying activity in Pre-CVs secondaries: Thecase of EC13471-1258.
Tiago Ribeiro1 Stella Kafka2 Raymundo Baptista1
1- Universidade Federal de Santa Catarina, Brasil
2- Spitzer Science Center/Caltech, USA
March 17, 2009
Tiago Ribeiro, Stella Kafka, Raymundo Baptista The case of EC13471-1258.
The case ofEC13471-
1258.
Tiago Ribeiro,Stella Kafka,RaymundoBaptista
Outline
Introduction
Observations
Analysis
Photometry
Spectroscopy
References
1 Introduction
2 Observations
3 AnalysisPhotometrySpectroscopy
Tiago Ribeiro, Stella Kafka, Raymundo Baptista The case of EC13471-1258.
The case ofEC13471-
1258.
Tiago Ribeiro,Stella Kafka,RaymundoBaptista
Outline
Introduction
Observations
Analysis
Photometry
Spectroscopy
References
The hunt for active secondary stars on CVs
Dynamo properties
Differences above/belowthe period-gap
Impact to binary evolution
Impact on mass transferhistory(?!)
Tiago Ribeiro, Stella Kafka, Raymundo Baptista The case of EC13471-1258.
The case ofEC13471-
1258.
Tiago Ribeiro,Stella Kafka,RaymundoBaptista
Outline
Introduction
Observations
Analysis
Photometry
Spectroscopy
References
Part 1: The tale of EC13471-1265 (QS Vir)
Basic properties (O’Donoghue et al., 2003):
DA(T1 = 14000K) +M3.5-4V (T2 = 3100K)
P= 3.62h - eclipsing(i = 75◦)
Low level acretion?
Active secondary?
A hibernating CV?
Tiago Ribeiro, Stella Kafka, Raymundo Baptista The case of EC13471-1258.
The case ofEC13471-
1258.
Tiago Ribeiro,Stella Kafka,RaymundoBaptista
Outline
Introduction
Observations
Analysis
Photometry
Spectroscopy
References
Shooting the scene: Take 1.
”... in order to assist modelling of the binary, the VRI photometry are
listed in full in table 6.” (O’Donoghue et al., 2003)
0.5 1.0 1.5 2.0φ
0
5
10
15
20
25
30
35
40
Flux (
mJy
)
JD1
0.5 1.0 1.5 2.0φ
JD2
0.5 1.0 1.5 2.0φ
JD3
0.5 1.0 1.5 2.0φ
JD4
0.5 1.0 1.5 2.0φ
0
5
10
15
20
25
30
35
40
Flux (
mJy
)
JD1
0.5 1.0 1.5 2.0φ
JD2
0.5 1.0 1.5 2.0φ
JD3
0.5 1.0 1.5 2.0φ
JD4
Flux calibrated using Schaifers and Voigt (1982)
-0.5 0.0 0.5 1.0 1.5φ
0
10
20
30
40
50
60
70
80
90
flux (
mJy
) VRIJH
1.6m Perking & Elmer + CAMIV (1024×1024
HAWAII detector) @ OPD, MG - Brasil
Tiago Ribeiro, Stella Kafka, Raymundo Baptista The case of EC13471-1258.
The case ofEC13471-
1258.
Tiago Ribeiro,Stella Kafka,RaymundoBaptista
Outline
Introduction
Observations
Analysis
Photometry
Spectroscopy
References
Shooting the scene: Take 2.
RC Spectrograph on the CTIO 4-m Blanco
0
2000
4000
6000
Phase=0.004
2000
4000
6000Phase=0.258
2000
4000
6000
8000Phase=0.510
4000 5000 6000 7000
2000
4000
6000
Phase=0.764
Tiago Ribeiro, Stella Kafka, Raymundo Baptista The case of EC13471-1258.
The case ofEC13471-
1258.
Tiago Ribeiro,Stella Kafka,RaymundoBaptista
Outline
Introduction
Observations
Analysis
Photometry
Spectroscopy
References
Digging into the gold mine...
Par. V R I J HF2(mJy) 3.05± 0.02 7.66± 0.04 28.2± 0.1 68.3± 0.4 72.8± 0.4F1(mJy) 3.42± 0.02 2.60± 0.05 2.2± 0.2 0.9± 0.1 1.0± 0.2F2/FT 47% 74% 93% 99% 99%
Simultaneously fitted parameters:i = (74.9± 0.6)◦ q = (0.50± 0.05)
i = (75.5± 2.0)◦ and q = 0.55± 0.1 (O’Donoghue et al., 2003)
-0.5 0.0 0.5 1.0 1.5φ
0
10
20
30
40
50
60
70
80
90
flux (
mJy
) VRIJH
0
5
10
15
20
25
30
35
40
Flux (
mJy
)
VRI light curve of EC13471-1258.
VRI
0.0 0.5 1.0 1.5 2.0φ
-4
-2
0
2
4
% (
O-C
)/avg
+ JD3 flaring light curve...
Tiago Ribeiro, Stella Kafka, Raymundo Baptista The case of EC13471-1258.
The case ofEC13471-
1258.
Tiago Ribeiro,Stella Kafka,RaymundoBaptista
Outline
Introduction
Observations
Analysis
Photometry
Spectroscopy
References
Digging into the gold mine...
Par. V R I J HF2(mJy) 3.05± 0.02 7.66± 0.04 28.2± 0.1 68.3± 0.4 72.8± 0.4F1(mJy) 3.42± 0.02 2.60± 0.05 2.2± 0.2 0.9± 0.1 1.0± 0.2F2/FT 47% 74% 93% 99% 99%
Simultaneously fitted parameters:i = (74.9± 0.6)◦ q = (0.50± 0.05)
i = (75.5± 2.0)◦ and q = 0.55± 0.1 (O’Donoghue et al., 2003)
-0.5 0.0 0.5 1.0 1.5φ
0
10
20
30
40
50
60
70
80
90
flux (
mJy
) VRIJH 0
5
10
15
20
25
30
35
40
Flux (
mJy
)
VRI light curve of EC13471-1258.
VRI
0.0 0.5 1.0 1.5 2.0φ
-4
-2
0
2
4
% (
O-C
)/avg
+ JD3 flaring light curve...
Tiago Ribeiro, Stella Kafka, Raymundo Baptista The case of EC13471-1258.
The case ofEC13471-
1258.
Tiago Ribeiro,Stella Kafka,RaymundoBaptista
Outline
Introduction
Observations
Analysis
Photometry
Spectroscopy
References
Robbing the bankLight curve inversion (Lanza et al., 1998)
6.5
7.0
7.5
flux (
mJy
)
-500
50
Lati
dude
9.510.010.511.011.512.012.513.0
flux (
mJy
)
-500
50
Lati
dude
29303132333435363738
flux (
mJy
)
0.0 0.2 0.4 0.6 0.8 1.0φ
-500
50
Lati
dude
0.0 0.2 0.4 0.6 0.8 1.0φ
Tiago Ribeiro, Stella Kafka, Raymundo Baptista The case of EC13471-1258.
The case ofEC13471-
1258.
Tiago Ribeiro,Stella Kafka,RaymundoBaptista
Outline
Introduction
Observations
Analysis
Photometry
Spectroscopy
References
The huntRVs and EWs
65
35
65
55
65
75
65
950.0
0.5
1.0
1.5
2.0Hα
48
36
48
52
48
68
48
84
Hβ
43
16
43
32
43
48
43
64
Hγ
40
76
40
92
41
08
41
24
Hδ
3920 3930 3940 3950 3960 3970 3980 39900.0
0.5
1.0
1.5
2.0
EW(Hα) ∼ -17A during flaring
events and ∼ -6A normal state
(Kawka et al., 2002)
0
-5
-10
-15
-20
-250.1 0.0
0.25
0.50
0.75
1.0
0.8 0.85 0.90
-5
-10
-15
-20
HJD-2454177
2.7 2.8 2.9 3
HJD-2454177
Tiago Ribeiro, Stella Kafka, Raymundo Baptista The case of EC13471-1258.
The case ofEC13471-
1258.
Tiago Ribeiro,Stella Kafka,RaymundoBaptista
Outline
Introduction
Observations
Analysis
Photometry
Spectroscopy
References
The arrestmentDoppler Tomography: Spruit (1998) MEM code
-500
0
500
v (
km/s
)Hα Hβ
-500 0 500v (km/s)
-500
0
500
v (
km/s
)
Hγ
-500 0 500v (km/s)
Hδ
CaII H
-500 0 500v (km/s)
CaII K
Tiago Ribeiro, Stella Kafka, Raymundo Baptista The case of EC13471-1258.
The case ofEC13471-
1258.
Tiago Ribeiro,Stella Kafka,RaymundoBaptista
Outline
Introduction
Observations
Analysis
Photometry
Spectroscopy
References
The judgmentRoche Tomography: Watson and Dhillon (2001)
φ = -0.25 φ = 0.25
North Pole
φ = 0.5 φ = 0.
Tiago Ribeiro, Stella Kafka, Raymundo Baptista The case of EC13471-1258.
The case ofEC13471-
1258.
Tiago Ribeiro,Stella Kafka,RaymundoBaptista
Outline
Introduction
Observations
Analysis
Photometry
Spectroscopy
References
Hanging × EscapingRT × LC
Correlation between photospheric and chromospheric activity(Korhonen et al., 2007; Alekseev and Kozlova, 2003, 2002).
Tiago Ribeiro, Stella Kafka, Raymundo Baptista The case of EC13471-1258.
The case ofEC13471-
1258.
Tiago Ribeiro,Stella Kafka,RaymundoBaptista
Outline
Introduction
Observations
Analysis
Photometry
Spectroscopy
References
Acknowledgments
Tiago Ribeiro, Stella Kafka, Raymundo Baptista The case of EC13471-1258.
The case ofEC13471-
1258.
Tiago Ribeiro,Stella Kafka,RaymundoBaptista
Outline
Introduction
Observations
Analysis
Photometry
Spectroscopy
References
References I
Alekseev, I. Y. and Kozlova, O. V. (2002). Starspots and active regions on the emission red dwarf star LQHydrae. A&A, 396:203–211.
Alekseev, I. Y. and Kozlova, O. V. (2003). Starspots and active regions on the chromospherically activebinary MS Ser. A&A, 403:205–215.
Kawka, A., Vennes, S., Koch, R., and Williams, A. (2002). Optical Observations and Orbital Parameters ofthe Close DA plus dMe Binaries BPM 71214, EUVE J0720-31.7, BPM 6502, and EC 13471-1258.Astronomy and Astrophysics, 124:2853–2867.
Korhonen, H., Brogaard, K., Holhjem, K., Ramstedt, S., Rantala, J., Thone, C. C., and Vida, K. (2007).Photospheric and chromospheric activity on ey dra. Astronomische Nachrichten, 328(9):897.
Lanza, A. F., Catalano, S., Cutispoto, G., Pagano, I., and Rodono, M. (1998). A&A.
O’Donoghue, D., Koen, C., Kilkenny, D., Stobie, R. S., Koester, D., Bessell, M. S., Hambly, N., andMacGillivray, H. (2003). The DA+dMe eclipsing binary EC13471-1258: its cup runneth over ... just.MNRAS, 345:506–528.
Schaifers, K. and Voigt, H. H. (1982). 4.2.5.16 the cousins (cape) vri color system. 2b:82.
Spruit, H. (1998). Fast maximum entropy doppler mapping. ArXiv Astrophysics e-prints.
Watson, C. A. and Dhillon, V. S. (2001). MNRAS.
Tiago Ribeiro, Stella Kafka, Raymundo Baptista The case of EC13471-1258.