Beyond the AGB

Beyond the AGB

(not in the sense of stellar evolution)

My new E-mail:

[email protected]

Stellar model

Inputs: opacity, eos, neutrinos rate,

thermonuclear rates…..

Outputs: Luminosity, effective temperature, chemical

composition…..

Sometime, ba-stards are

lucky

Lab for Underground Nuclear Astrophysics

(LUNA)

Ba-star-dini head quarter

Gran Sasso

Sn Watch-dog IR Telescope

(SWIRT)

Noise reduction at LNGS(shielding: 4000 m w.e.)

Radiation LNGS/surface

muonsneutronsPhotons

10-6

10-3

0.2

Laboratory for Underground Nuclear Astrophysics

The adopted set-upThe adopted set-up

SPECIFICATIONS

Umax= 50 – 400 kV

I 500 A for proton

Emax= 0.07 keV

The H burning The H burning

p + p 2H + e+ + [0.27 MeV] p + e- + p 2H + e+ + [1.44 MeV]

2H + p 3He +

3He + 3He 4He + 2p 3He + 4He 7Be + 3He + p 4He + e+ +

7Be + e- 7Li + [0.81 MeV] 7Be + p 8B +

7Li + p 8Be 8B 8Be + e+ + [6.80 MeV]

8Be 2 4He 8Be 2 4He

99.75%99.75% 0.25%0.25%

86%86% 14%14%

99.89%99.89% 0.11%0.11%

CHAIN IIICHAIN IIIQQeffeff= 19.67 MeV= 19.67 MeV

CHAIN II CHAIN II QQeffeff= 25.66 MeV= 25.66 MeV

CHAIN ICHAIN IQQeff eff = 26.20 MeV= 26.20 MeV

CHAIN IVCHAIN IVQQeffeff= 16.84 MeV= 16.84 MeV

pp chain

22··1010-5-5%%

LUNA 2001

LUNA 1999

NABONA 2000 & LUNA 2001

ERNA & LUNA

NABONA

0E+00

2E+00

4E+00

6E+00

8E+00

1E+01

0 50 100 150 200 250 300 350 400

E (keV)

S-f

acto

r (k

eVb)

solid target tot

gas-target

14N(p,)15O: the bottleneck of the CNO

Stellar Energies: the Gamow’s peak

Isochrones for Globular ClustersIsochrones for Globular Clusters

Imbriani, Costantini, Formicola et al. , A&A, 420, 2004

The age of the oldest Globular Clusters should be The age of the oldest Globular Clusters should be increased by about 0.7-1 Gyrincreased by about 0.7-1 Gyr

V - I

Straniero et al. 1999

from

VI TORINO WORKSHOP

ROMEEd. by Franca

D’Antona

Further Adventures

• 12C()16O @ ERNA

• 25Mg(p,)26Al @ LUNA

Coming soon

M-R relation:high rate = shorter C burning =

more compact

progenitorEnd of C-burning

Onset of core collapse

Beginning of Ne-burning

From Imbriani et al. 2001 ApJ 558,903

YieldsAffected by the steepness M-R relation

Affected by the amount of C available for shell burning

NOW, ON THE TOP

…. and ON THE ICE

CW-Leo: a red lighthouse

Reflected V light

Irradiated IR light (10 m

Stardust

Grain signatures are more clear above 3

SiC grains

Courtesy of Busso & Co

The IRAIT project, a Italian-Spanish collaboration

CONCORDIA (3200 m)

The Robotic Telescope

Riunione IRAIT-AMICA

Roma, 27 Gennaio 2006

AMICAAntarctic Multiband Infrared CAmera

I due rivelatori di AMICA

SWA (1-5 m) Array InSb 256 x 256 Raytheon Corp.

LWA (5-28 m) Array Si:As BIB MF-128 DRS Techn. Inc.

Top 25 - 35 K

Top 4 - 10 K



Sistema ottico di AMICA

• Sistema completamente riflettente

• 4 specchi dorati (2 parabole fuori asse + 2 piani)

• Riduttore di focale 1 : 1.47

• Diffraction-limited performances

• Campionamento ottimale PSF di Airy a 3 m su SWA e a 10 m su LWA

• Scala: 0.538 arcsec / pix (SWA)

1.345 arcsec / pix (LWA)

• FOV: 2.29 2.29 arcmin2 (SWA)

2.87 2.87 arcmin2 (LWA)



Finestra d’ingresso e filtri

• Finestra in CdTe ad alta trasmissione (>70 % tra 1 e 25 m)

• Filtri in quarzo (<6 m), germanio (6 m<<13 m) e CdTe (>13 m):

Banda larga

K @ 2.21 m (0.34 m) L @ 3.43 m (0.60 m)M @ 5.08 m (0.39 m)N1 @ 8.79 m (0.98 m)N2 @ 11.63 m (3.29 m)Q1 @ 18.96 m (3.40 m)Q2 @ 22.40 m (1.95 m)

Banda stretta

3 filtri eventuali da scegliere da una lista già compilata



Finestra d’ingresso realizzata insieme al criostato da IRlabs.

Contatti in corso con Barr Associates per i dettagli dei filtri.

ARS Displex Closed Cycle Cryocooler DE-210S with ARS-10 Compressor

2nd stage: 0.8 W @ 4.2 K1st stage: 35 W @ 41 KMin temp.: 0 W @ 2.8 KType: GMCooling: Water, CUSTOM

Power consumption: 6 kW @ 200 V AC, 3 phase, 50 Hz

Ambient temperature range: 5 to 35°C

Cooling water: Minimum flow 8 LPM @ 27°C maximum temperature



IMPORTANTE: Serie di cryocooler già sperimentati in Antartide.



Taormina, June, 2005

The AMICA Control System:

TEMP- CONTROLLEDAMBI ENT

-10 c° / 10 c°

AMICACRYOSTAT

- 40 c° / - 80 c°external temperature

NIRPRE-AMPCLOCK

BOX

MIRPRE-AMPCLOCK

BOX4.2 K40 K

cryo-cooler CRYO-COOLERCOMPRESSOR

DUAL-STAGESTEP-MOTORCONTROLLER

VACUUMPUMP

VACUUMCOMMANDED

VALVEP-GAUGE

TEMPERATURE&

STEP-MOTORCONTROL

TEMP- CONTROLLEDAMBI ENT

-10 c° / 10 c°

C-PCI CRATEHOST PENTIUM CPU

NIR/MIR DETECTORCONTROLLER

LAKESHORETEMPERATURE

CONTROLLER & MONITOR

CONTROLPLC

PMC DETECTORCONTROL I/F

An Example

Source Flux : 9.5 JyIntegration time : 20 s (0.01s x frame)Point source overall counts (ADU): 5.88154e+006Point source clean counts (ADU): 1.79103e+006Sky average counts (ADU): 83479.9Signal-to-noise ratio: 20.4989

λ : 21 μ



http://www.te.astro.it/attivitascientifica/progetti/amica/index.htm

Beyond the AGB

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