Документ взят из кэша поисковой машины. Адрес оригинального документа : http://www.mrao.cam.ac.uk/wp-content/uploads/2014/04/GAngladaEscude.pdf Дата изменения: Wed Apr 16 17:16:50 2014 Дата индексирования: Sun Apr 10 13:31:05 2016 Кодировка: Поисковые слова: mars

Efficient Doppler detection of short period Earths

Guillem Anglada-Escude Queen Mary University of London

UK collaborators (so far) M. Tuomi, H. R.A. Jones, J. Barnes (UH) R.P. Nelson, S-J.Paardekooper (QMUL) D. Brown & D. Polaco (Warwick) Daniel Staab, Carole Haswell (Open Univ.)


Attempts of

Efficient Doppler detection of short period Earths
and what we learnt from them
Mikko Tuomi, Mathias Zechmeister, Pedro J. Amado, Ansgar Reiners, Stefan Dreizler, Hugh R. A. Jones, Sandra Jeffers, Julien Morin, Chris Marvin, Zaira M. Berdinas, Luis F. Sarmiento, Cristina Rodriguez-Lopez, Aviv Ofir, Ulf Seeman, Enrico Gerlach, R. P. Butler, S. S. Vogt, E. Rivera, I. Ribas, J.A. Caballero, A. Hatzes, CARMENES, CRIRES+/ESO...


Extra information is needed


Corot 7b



Kepler 78
Howard et al. 2013, Nature Pepe et al. 2013, Nature

Prewhitening Rotation harmonic subtraction Offset-each night Leger et al. 2009 A&A Queloz et al. 2009 A&A Hatzes et al. 2011 ApJ 2.4 to 8.5 MEarth ..according to wikipedia.

KECK/HIRES ­ Prewhitening DONE! HARPS-N ­ Fit offset to each night

Prot = 21 days

Prot = 12.4 days


Extra information is needed


Corot 7b
Bayesian Analysis with correlations (NEW) Tuomi et al. in prep.



Kepler 78
Howard et al. 2013, Nature Pepe et al. 2013, Nature

KECK/HIRES ­ Prewhitening DONE! HARPS-N ­ Fit offset to each night

Prot = 21 days

Prot = 12.4 days


Cool tiny beats survey
Short period planets


Pulsations Activity



... at high cadence


First run


First run


First run


Charge Transfer efficiency


Nearby star 1 - Ultras stable prototype

Ultra-stable M-dwarf RMS 0.85 m/s over 10 years


Nearby star 1 - Ultras stable prototype

M sin I = 0.24 M

earth

Ultra-stable M-dwarf RMS 0.85 m/s over 10 years


Nearby Star 2 - Warm Earth-mass planet


Desperate need for improved physical/statistical models... from data
The signals are already there... can we trust them?

New proposal : K2 meets HARPS Obtain space-based photometry Doppler measurements of 10-15 bright M-dwarfs Follow-up of CTB targets Reduced proprietary period Queloz et al. proposal on 40 Eri Operate HARPS in monitoring mode Benchmark mid-K dwarf Continuous monitoring for 100 days of wonder No proprietary period


... but we also got lucky ;)


... but we also got lucky ;)

Bright, very nearby star of the CTB sample. No planets reported RMS 2.0 m/s over 7 years


Star 3


Star 3


... but we also got lucky :)

RMS ~ 0.9 m/s

Kapteyn b, P = 48.7 days, M sin I = 4.0 Mearth,

Kapteyn c, P = 121.0 days, M sin I = 7.0 Mearth,


... but we also got luck/y] :)-0 [Fe H ~

.9 Age > 10 Gyrs?

RMS ~ 0.9 m/s

HZ
Kapteyn b, P = 48.7 days, M sin I = 4.0 Mearth, Kapteyn c, P = 121.0 days, M sin I = 7.0 Mearth,


... but we also got lucky :)

1 cl 00% ou ds CO

cl ou ds cl ou ds

cl ou ds

10 0%

50 %

Sun
Mercury Venus Earth Mars

N o

Habitable Zone

HZ with CO2 clouds

0.0

0. 5

1. 0

1. 5

2.0

2

2. 5

AU

Kapteyn's 0. 0 0. 15

b

c

0. 20

0. 25

0. 3

AU

[Fe/H] ~ -0.9 Age > 10 Gyrs?

d = 3.9 pc


Precision spectroscopy
Su pp HARPS-TERRA tool-box. or tn To be released soon. ee de HARPS-ESO, HARPS-N, SOPHIE (even d! CORALIE but don't tell Didier)

Extraction pipeline New wavelength calibration & Flux normalization Almost ready to go! HARPS-ESO... for now CRIRES+ & CARMENES (nIR high resolution) Calibration, reduction and pipelines New concepts for spectrograph design Analysis of time-series
Interested? Drop me a line! guillem.anglada@gmail.com