The Search Of Nine Planet, Pluto (Artigo Histórico)
Ph press talk
1. A
Transi)ng
Circumbinary
Planet
in
a
Quadruple
Star
System
Meg
Schwamb
(Yale
University)
megan.schwamb@yale.edu
Image
Credit:
Haven
Giguere
2. Discovery
and
Confirma)on
of
PH1:
A
Circumbinary
Planet
in
a
Four
Star
System
• Planet
spoDed
by
ciEzen
scienEsts
reviewing
Kepler
light
curves
on
the
Planet
Hunters
(planethunters.org)
website
•
Combining
the
Kepler
light
curve
+
measured
radial
velociEes,
we
have
confirmed
the
planet
and
the
properEes
of
its
host
stars
• First
planet
discovered
in
a
four
star
system
3. Transits
spoBed
in
Kepler
light
curve
of
eclipsing
binary
KIC
4862625
Quarter 2 Quarter 4
Secondary Eclipse Planet Transit
Planet Transit
Secondary Eclipse Secondary Eclipse
Primary Eclipse
Primary Eclipse
Days from Start of Quarter 1 Days from Start of Quarter 1
Robert
Gagliano
Kian
Jek
4. Circumbinary
planet,
orbi)ng
both
stars
in
binary
star
system
x1000 Normalized Flux
Q2 Q4
Q5 Q7
Q8 Q10 Q11
x1000 Normalized Flux
Time (BJD-2455000)
Schwamb
et
al.
(ApJ
submiDed)
5. Keck
HIRES
Radial
Veloci)es
Radial Velocity (km s-1)
Phase (P =20.000251025, T0=54967.8195)
Schwamb
et
al.
(ApJ
submiDed)
Binary
has
20
day
orbital
period
6. Adap)ve
Op)cs
Keck
Observa)ons
0.7’’ Contaminator KIC 4862625 N
E
Row
0.07’’ Contaminator KIC 4862625
Column Column
Row
0.5"
Schwamb
et
al.
(ApJ
submiDed)
Column Column
7. Planet
Hunters’
First
Confirmed
Planet
• PH1
is
a
6.18
±
0.17
Earth
radii
planet
orbits
its
parent
stars
every
138.3
days
(semimajor
axis
=0.65
AU)
• PH1
is
<
0.53
Jupiter
masses
• The
parent
eclipsing
stars
are
1.7
&
0.4
Solar
radii
(1.5
&
0.41
Solar
masses)
• The
second
pair
of
stars
at
~1000
AU
is
bound
to
the
planetary
system
Image
Credit:
Haven
Giguere/Yale
• We
esEmate
an
age
of
~2
Gyr
for
the
system
8. 0.5 AU 0.5 AU 0.5 AU
Kepler-34 Kepler-35 Kepler-16
Kepler-38 Kepler−47 0.5 AU PH1 0.5 AU
c
A Aa
B
B A
Ab
To Earth
To Earth
b
b
b
b Ab b
B A c Aa
9. PresentaEon
slides,
images
&
paper
preprint:
hBp://www.planethunters.org/dpspress2012
Username:
planet
Password:
hunters
megan.schwamb@yale.edu
This
work
is
supported
by
the
NSF
Astronomy
&
Astrophysics
Postdoctoral
Fellowship
program
and
NASA
