S a m u e l B o i s s i e r , L a b o r a t o - - PowerPoint PPT Presentation

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S a m u e l B o i s s i e r , L a b o r a t o - - PowerPoint PPT Presentation

Feb 13, 2024 115 likes •250 views

http://mission.lam.fr/vestige/index.html S a m u e l B o i s s i e r , L a b o r a t o i r e d ' A s t r o p h y s i q u e d e M a r s e i l l e 1 The Team 2 Galaxies and gas in clusters C l

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SLIDE 1

1

S a m u e l B

  • i

s s i e r , L a b

  • r

a t

  • i

r e d ' A s t r

  • p

h y s i q u e d e M a r s e i l l e

http://mission.lam.fr/vestige/index.html

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SLIDE 2

2

The Team

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SLIDE 3

4

Galaxies and gas in clusters

C l u s t e r e n v i r

  • n

me n t :

  • h

i g h g a l a x y d e n s i t y ( ρg

a l

~ 1 g a l M p c

  • 3

)

  • h

i g h v e l

  • c

i t y d i s p e r s i

  • n

( v ~ 1 k m s

  • 1

)

  • I

C M : h

  • t

( T ~ 1

7

  • 1

8

K ) a n d d e n s e ( ρI

C M

~ 1

  • 3

c m

  • 3

) . P e r t u r b i n g me c h a n i s ms :

  • s

t a r v a t i

  • n
  • g

a l a x y h a r a s s m e n t

  • r

a m p r e s s u r e

  • t

h e r m a l e v a p

  • r

a t i

  • n

Q u e s t i

  • n

s :

  • F

r a c t i

  • n
  • f

g a l a x i e s a f f e c t e d ?

  • D
  • m

i n a n t p r

  • c

e s s ?

  • E

f f e c t

  • n

s t a r f

  • r

m a t i

  • n
  • F

a t e

  • f

s t r i p p e d g a s V I R G O c l u s t e r :

  • U

V : G U V i C S ( U V )

  • V

i s i b l e : N G V S

  • F

I R : H e V i C S

  • H

I : A L F A L F A + V I V A + A S K A P

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SLIDE 4

5

VESTIGE : a CFHT Large Program

  • L

P ( 2 1 7

  • 2

1 9 ) , M e g a C a m @C F H T ( 1

  • x

1

  • )
  • 5

n i g h t s a l l

  • c

a t e d t

  • c
  • v

e r t h e V i r g

  • c

l u s t e r w i t h i n 1 v i r i a l r a d i u s ( ~ 1 4

  • 2

)

  • I

n t e g r a t i

  • n

t i m e :

  • 2

h i n t h e n e w H f i l t e r α ( = 6 5 6 3 Å , = 1 6 Å ; T = 9 3 % ) , λ Δλ

  • 1

2 m i n i n r ( f

  • r

t h e s t e l l a r c

  • n

t i n u u m s u b t r a c t i

  • n

)

  • S

e n s i t i v i t y :

  • f

( H ) α ~ 2 x 1

  • 1

7

e r g s e c

  • 1

c m

  • 2

( 5 ) σ f

  • r

p

  • i

n t s

  • u

r c e s

  • (

H ) Σ α ~ 2 x 1

  • 1

8

e r g s e c

  • 1

c m

  • 2

a r c s e c

  • 2

( 1 ) σ a t 3 a r c s e c r e s

  • l

u t i

  • n
  • M

e d i a n s e e i n g . 6 5 a r c s e c . ( A t h e V i r g

  • C

l u s t e r d i s t a n c e : 1 a r c s e c = 8 p c )

  • E

l i x i r

  • L

S B p

  • i

n t i n g s t r a t e g y f

  • r

s k y b a c k g r

  • u

n d . V i r g

  • E

n v i r

  • n

m e n t a l S u r v e y T r a c i n g I

  • n

i s e d G a s E m i s s i

  • n

H narrow band: α Yagi et al 2010 ; Fossati et al 2012 ; Gavazzi et al 2001 ; Boselli & Gavazzi 2014 ; Yoshida et al 2002 ; Kenney et al 2008 ; Sun et al 2007 ; Zhang et al 2013

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SLIDE 5

6

T h e e f f e c t s

  • f

t h e e n v i r

  • n

m e n t

  • n

g a l a x y e v

  • l

u t i

  • n

T h e f a t e

  • f

t h e s t r i p p e d g a s i n c l u s t e r g a l a x i e s T h e s t a r f

  • r

m i n g p r

  • c

e s s i n n e a r b y g a l a x i e s T h e i

  • n

i s e d g a s e m i s s i

  • n

i n e a r l y

  • t

y p e g a l a x i e s T h e H l u m i n

  • s

i t y f u n c t i

  • n
  • f

g a l a x i e s α T h e H s c a l i n g r e l a t i

  • n

i n g a l a x i e s α T h e n a t u r e

  • f

d a r k g a l a x i e s T h e d y n a m i c a l s t r u c t u r e

  • f

t h e V i r g

  • c

l u s t e r T h e H I I l u m i n

  • s

i t y f u n c t i

  • n
  • f

c l u s t e r g a l a x i e s P l a n e t a r y n e b u l a e a n d t h e

  • r

i g i n

  • f

t h e i n t r a c l u s t e r l i g h t T h e d i f f u s e i

  • n

i s e d e m i s s i

  • n
  • f

t h e M i l k y Wa y H i g h v e l

  • c

i t y c l

  • u

d s , c

  • m

p a c t s

  • u

r c e s a n d G a l a c t i c f

  • u

n t a i n s H i g h r e d s h i f t e m i s s i

  • n

l i n e g a l a x i e s ( L y , [ O I I ] , [ O I I I ] ) α Q S O s

VESTIGE : a CFHT Large Program

V i r g

  • E

n v i r

  • n

m e n t a l S u r v e y T r a c i n g I

  • n

i s e d G a s E m i s s i

  • n

V I R G O S C I E N C E F O R E G R O U N D S C I E N C E B A C K G R O U N D S C I E N C E

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SLIDE 6

7

Status

  • d

a t a f u l l y r e d u c e d w i t h M e g a P i p e ( a s t r

  • m

e t r i c c

  • r

r e c t i

  • n

, p h

  • t
  • m

e t r i c c a l i b r a t i

  • n

a n d t h e s t a c k i n g

  • f

t h e d i f f e r e n t f r a m e s ) .

  • o

n

  • g
  • i

n g

  • p

t i m i s a t i

  • n
  • f

t h e p i p e l i n e f

  • r

s t e l l a r c

  • n

t i n u u m s u b t r a c t i

  • n

f

  • r

s

  • u

r c e s

  • f

d i f f e r e n t c

  • l
  • r

.

  • v

e r i f i c a t i

  • n
  • f

p e r f

  • r

m a n c e s ( s e n s i t i v i t y / s e e i n g )

  • D

e s c r i p t i

  • n
  • f

t h e s u r v e y i n “ A V i r g

  • E

n v i r

  • n

m e n t a l S u r v e y T r a c i n g I

  • n

i s e d G a s E m i s s i

  • n

( V E S T I G E ) . I . I n t r

  • d

u c t i

  • n

t

  • t

h e S u r v e y ” – B

  • s

e l l i e t a l . , i n p r e p a r a t i

  • n
  • 2

4 4 v a l i d a t e d f r a m e s i n t h e r

  • b

a n d ( 6 s e c e x p

  • s

u r e ) a n d 2 6 8 ( 6 s e c ) i n t h e H α, f

  • r

a t

  • t

a l

  • f

5 4 . 4 2 h

  • u

r s ( e x p . t i m e ) .

  • d

a t a f u l l y p r

  • c

e s s e d w i t h E l i x i r

  • L

S B .

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SLIDE 7

8

Gavazzi et al. 2000 1.2 arcsec seeing Wide Field Camera - INT

Filaments in M87

Difguse emission in early-type galaxies in Virgo, both in massive E and dE

  • Shocks in merging/interactjng systems
  • Difguse emission from evolved stellar populatjons
  • Residual star formatjon (core of recently formed dE)

Belfiore et al. 2016 – Michielsen et al. 2004 – Boselli et al. 2008

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SLIDE 8

9

Star forming regions in NGC4254

ugr NGVS UV GALEX

SF regions detected in FUV and NUV ; a few detectjon in u

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SLIDE 9

10

Star forming regions in NGC4254

Identjfjcatjon of resolved HII regions of luminosity down to 10^37 erg/s New Hα measurements to constrain star formatjon propertjes in outer regions (IMF, stochastjcity).

VESTIGE UV GALEX

Hα

Boselli et al 2017

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SLIDE 10

11

Boselli et al 2016

Ram Pressure Stripping In NGC4569

From pilot

  • bservations
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SLIDE 11

12

Boselli et al 2016

Ram Pressure Stripping In NGC4569

ionised gas mass in the tail = large fractjon of stripped HI Ionisatjon in situ (not star formatjon) Very limited (if not 0) star formatjon linked to RPS (see also Boissier et al. 2012) Gas expelled by the nuclear outglow is ~ 1% that removed by ram pressure

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SLIDE 12

13

Ram Pressure Stripping In NGC4330

Chung et al 2007 Fossati et al 2017

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SLIDE 13

14

O n g

  • i

n g L a r g e P r

  • g

r a m : H

α

s u r v e y i n t h e V i r g

  • c

l u s t e r F i r s t R e s u l t s

  • F

i l a m e n t s a n d d i f f u s e s t r u c t u r e s i n E a n d d E

  • I
  • n

i s e d G a z i n r a m

  • p

r e s s u r e s t r i p p e d s y s t e m s

  • H

I I r e g i

  • n

s i n

  • u

t e r r e g i

  • n

s

  • f

V i r g

  • g

a l a x i e s S t a y t u n e d f

  • r

m

  • r

e

http://mission.lam.fr/vestige/index.html

Boselli et al. 2016