Exoplanetary
transits observations

DIFI 2016-06-30

Davide Ricci

A planet?
A dwarf planet?

Current dwarf planets: Pluto, Eris, Ceres, Makemake, Haumea.

IAU 2006

Popular imagination

...Back to 1995

the first extrasolar planet around a MS star @ OHP

51 peg 51 peg Mayor, M., & Queloz, D. 1995, Nature, 378, 355

Radial Velocity

51 peg
gif reference

51 Pegasi b ... or Dimidium
has a radial velocity of 55m/s. etc.
Gliese 581 c
has a radial velocity of 3.18m/s. Other planets: b, d?, e, f, g?
Current radial velocity limit: 50cm/s!!!

Rossiter - McLaughlin effect

Detection Methods

Imaging

tap
HR8799 Marois et al (2010) Occultation of the star to rise the contrast.

Microlensing

Light curve of the source
under the effect of
a massive deflector...
with planet.

Transits

Modelling the shape to obtain physical and orbital parameters (Mandel & Agol 2002)

Let's focus on transits

Orbital inclination

tap tap

i : depth of the transit

Scaled semi-major axis

tap tap

a/R* : duration and depth of the transit

Planet/star radius ratio

tap tap

Rp/R* : depth of the transit

Limb Darkening

tap tap

Uniform disc star, or not.

Transmission spectroscopy

detecting atmospheric features

Period

tap tap

→ duration of the transit.

Mid-transit time

tap tap

→ Not a physical parameter, → period (TTVs).

Transit Timing variations

Telescopes

OARPAF
Telescopio da 80cm

Overview

specs
more

Not only transits

Multiply images quasars! → SDSS 1004+41123
qso

Preliminary
results

kelt-1   hat-p-3   tres-3   wasp-58  

kelt-1

hat-p-3

Mexican curves only... currently :)

Draft in preparation

tres-3

Draft in preparation: First OARPAF scientific results!

wasp-58

Not well studied object

A candidate for a multi-site observation? (LCOGT style!)

JOIN
Antola observing team!

We are observing WTS-2 for TTVs during these nights

vertighel
thanks
davide.ricci82@gmail.com
ADS: http://is.gd/ricci_publications2

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