Upload
lamdan
View
220
Download
0
Embed Size (px)
Citation preview
The GAPS Project with HARPS-N: possible synergies with CHEOPS
I s a b e l l a P a g a n o a n d t h e G A P S t e a m
1 s t C H E O P S S c i e n c e M e e t i n g B e r n , 1 5 - 1 6 M a y 2 0 1 3
• GAPS, Global Architecture of Planetary Systems, is a long-term programme for the comprehensive characterization of the architectural properties of planetary systems as a function of the hosts’ characteristics (mass, metallicity, environment).
• GAPS has been approved by Italian TNG TAC: – AOT 26 (Aug 2012-Jan 2013): 36 nights – AOT 27 (Feb 2013-Jul 2013): 40 nights
+ long-term status è proposal approved for 2 years.
The GAPS Project
INAF Guidelines to TAC: to dedicate ~80 nights/year of TNG to a large coordinated effort of the Italian community willing to study exoplanets with HARPS-N.
16/5/13 1st CHEOPS Science Meeting - Bern
~ 50 INAF and associated scientists in Italy; ~15 scientists from foreign institutes.
Wide range of expertise – High resolution spectroscopy – Stellar rotation and activity – Crowded stellar environments – Formation of planetary systems – Planetary dynamics
The GAPS Team
16/5/13 1st CHEOPS Science Meeting - Bern
Search for low mass companions in known
planetary systems Frequency of Neptune-
mass companions around Low [Fe/H] stars
Search for GP orbiting stars in crowded
environments
Characterization of planetary orbits through RML effect
Asteroseismology &
Star-Planet Interaction
Search for low mass planets orbiting M dwarfs
Science Themes
16/5/13 1st CHEOPS Science Meeting - Bern
32%
32.5%
12.5%
15%
6%
2%
AIMS: v Better estimate of frequency of Super Earths in HZ of M dwarfs (at moment
0.41+0.54-0.13 Bonfills et al. 2012)
v To provide benchmark systems for atmospheric characterization
SAMPLE: • 120 M0-M2.5 dwarfs (0.45≤MS/M¤≤0.5)
evenly distributed in the Northern sky • V<12 mag • Low RV jitter • 30% in GAIA Fields with >100 Transits
Searching for potentially habitable Neptunes and Super Earths (M < 15 M⊕♁) around a well defined and well characterized sample of M dwarfs
Search for low mass planets orbiting M dwarfs
From a total of 273 observations till mid april 2013
Expected 20± 4 HZ SEarths & Neptunes according to Bonfills et al. (2012) in 2 years
of realistic monitoring! 16/5/13 1st CHEOPS Science Meeting - Bern
AIMS: a. Determine the fraction of planetary systems
hosting giant planets beyond 1 AU and low-mass planets (M< 1 MNeptune) in close orbits;
b. Understand the role of additional planetary (or stellar) companions on the alignment between planetary orbits and stellar rotation;
c. Carry out a detailed study of a sub-sample of multi-planet systems.
SAMPLE: a. 25 single planets hosts (V < 11) suitable for 1 m/s RV monitoring (low activity, a> 1
AU) with no RV data useful for LMP search; b. 42 transiting giant planets with V 12 & δ>−20°; c. 5 planetary systems for which an intensive RV monitoring.
Main goal is to provide the frequency of “scaled-down” analogues of the Solar System.
Search for low mass companions in known planetary systems
16/5/13 1st CHEOPS Science Meeting - Bern
AIMS: a. derive the frequency of Neptunes and Super-
Earths in the metal-poor regime; b. compare it to the published results for solar
metallicity SAMPLE: a. 200 stars with −2.0 <[Fe/H] <−0.5 observed
with Keck/HIRES with precision of 9 m/s b. A subsample of 60 are:
• −1.0 <[Fe/H] <−0.5 dex • Chromospherically quiet • V<11 mag
Search for Neptunes and Super-Earths (M < 20 M⊕) around a sample of moderately (−1.0 < [Fe/H] < −0.5) metal-poor FGK dwarfs.
Frequency of Neptune-mass companions around Low [Fe/H] stars
16/5/13 1st CHEOPS Science Meeting - Bern
Mo
rda
sini e
t a
l. 20
12) PIMF
30 measurements distributed over two seasons will allow us to identify
all planets with 10 < Mp sin i < 15 M⊕ with P < 100 days
Neptune-mass companions around Low [Fe/H] stars - Preliminary results
16/5/13 1st CHEOPS Science Meeting - Bern
A preliminary orbital solution based on GAPS RV data for one of the program stars showing evidence for a short-period, Neptune-mass planet.
• HARPS-N will provide new targets for the building of the CHEOPS input catalogue.
• GAPS is running four detection programs tailored at searching: – Super Earths and Neptunians in the HZ of early M dwarfs; – Neptunians around metal poor FGK dwarfs; – Low mass planets in solar-like planetary systems; – Jupiters around stars in OCs.
Conclusions
16/5/13 1st CHEOPS Science Meeting - Bern
• HARPS-N will provide new targets for the building of the CHEOPS input catalogue.
• GAPS is running four detection programs tailored at searching: – Super Earths and Neptunians in the HZ of early M dwarfs; – Neptunians around metal poor FGK dwarfs; – Low mass planets in solar-like planetary systems; – Jupiters around stars in OCs.
Conclusions
16/5/13 1st CHEOPS Science Meeting - Bern