THE JVLA TALE ON THE MISSING FIREWORKS IN JKCS 041

Maurilio Pannella w Veronica Strazzullo, Stefano Andreon, Frazer Owen and Rosita Paladino LET THE FIREWORKS BEGIN OR …

(Alberts et al., 2016)

2 THE REVERSAL OF FORTUNE OR …

(Tran et al., 2015) IRC 0218 @ z=1.623 / MOSFIRE-H�

3 THE HERSCHEL VIEW OF CLUSTERS

XDCP @ z=1.58 / PACS-SPIRE

(Santos et al., 2015)

4 AND STILL, THERE ARE CLEAR SIGNATURES OF NURTURING

logM*>10.85

(Strazzullo, MP et al., 2019)

5 SOMEWHERE, FOR SOMEONE, THE PARTY SEEMS ALREADY OVER !

(Newman et al., 2014)

6 A MASSIVE JKCS 041 AT Z~1.8

N

E J - K selected overdensity R 500 20 arcsec 170 kpc @ z=1.8 few times 10^14 Mo

X-ray detected 255 275 272 289 286 281 317 332 356 352 355 375/376 17 spectroscopic cluster members 411 359 447 387 404

531

657

693

772

(Newman et al., 2014) 7 A MASSIVE GALAXY CLUSTER JKCS 041 AT Z~1.8

J - K selected overdensity

few times 10^14 Mo

X-ray detected

17 spectroscopic cluster members

UVJ classification 15/17 quiescent

(Newman et al., 2014)

8 A MASSIVE GALAXY CLUSTER JKCS 041 AT Z~1.8

J - K selected overdensity

few times 10^14 Mo

X-ray detected

17 spectroscopic cluster members

UVJ classification 15/17 quiescent

100% quenching efficiency ???

(Newman et al., 2014)

9 A MASSIVE GALAXY CLUSTER JKCS 041 AT Z~1.8

Is this a freak?

cluster-to-cluster variation?

selection bias?

UVJ classification?

No dust tracer of formation?

(Newman et al., 2014)

10 ON THE UVJ CLASSIFICATION

11 ON THE UVJ CLASSIFICATION

Constant SFH Exp-decl SFH

12 ON DUST ATTENUATION

AUV = 2.5 LOG (SFRIR/SFRUV + 1)

13 ON DUST ATTENUATION

AUV = 2.5 LOG (SFRIR/SFRUV + 1)

– UV slopes become bluer with

(MP et al., 2015)

14 ON DUST ATTENUATION

AUV = 2.5 LOG (SFRIR/SFRUV + 1)

– UV slopes become bluer with redshift

– SFR gets less attenuated at higher redshift

(MP et al., 2015)

15 ON DUST ATTENUATION

AUV = 2.5 LOG (SFRIR/SFRUV + 1)

– UV slopes become bluer with redshift

– SFR gets less attenuated at higher redshift

– HII regions attenuation is the same at all

(Price et al., 2013)

16 ON DUST ATTENUATION

AUV = 2.5 LOG (SFRIR/SFRUV + 1)

x1 x0.8 – UV slopes become bluer with redshift x0.44

– SFR gets less attenuated at higher redshift

– HII regions attenuation is the same at all redshifts

– E(B-V)cont > 0.8 x E(B-V)lines

(MP et al., 2015)

17 ON DUST ATTENUATION

— calibrated on FMOS-COSMOS

— Halpha from MS/dust attenuation ev.

— Hbeta from Halpha/Balmer dec.

— [OIII] from Hbeta/M*

at z~1.8 — L([OII]) ~ L(Halpha)

(Valentino et al., 2017)

18 ON DUST ATTENUATION

— calibrated on FMOS-COSMOS

— Halpha from MS/dust attenuation ev.

— Hbeta from Halpha/Balmer dec.

— [OIII] from Hbeta/M*

at z~1.8 — L([OII]) ~ L(Halpha)

THE MASSIVE POPULATION IS BEYOND REACH ! (Valentino et al., 2017)

19 A CLEAN SHOT THROUGH THE DUST: PROBING THE MS HIGH MASS END OF JKCS 041 WITH JVLA

24 hours JVLA time

3 GHz single pointing rms = 1.6 uJy/beam

0.6” resolution

184 JVLA detections

FWHP ~ 14’

20 A CLEAN SHOT THROUGH THE DUST: PROBING THE MS HIGH MASS END OF JKCS 041 WITH JVLA

The radio-FIR correlation

L /(3.75 × 1012W) q = log IR IR −1 L1.4 /WHz

Long story short …

— The correlation holds up to high z

— stays (fairly) constant with redshift… qIR

(MP et al. 2015)

21 A CLEAN SHOT THROUGH THE DUST: PROBING THE MS HIGH MASS END OF JKCS 041 WITH JVLA

24 hours JVLA time

3 GHz single pointing rms = 1.6 uJy/beam

0.6” resolution

184 JVLA detections

FWHP ~ 14’

(MP et al. 2015)

22 THE JVLA TALE ON THE MISSING FIREWORKS

23 THE JVLA TALE ON THE MISSING FIREWORKS

24 THE JVLA TALE ON THE MISSING FIREWORKS

286

352 355

-1.9e-05 -1.5e-05 -1.1e-05 -7.3e-06 -3.6e-06 1.6e-07 3.9e-06 7.6e-06 1.1e-05 1.5e-05 1.9e-05

25 THE JVLA TALE ON THE MISSING FIREWORKS

(Newman et al. 2014)

26 THE JVLA TALE ON THE MISSING FIREWORKS

(Newman et al. 2014)

27 THE JVLA TALE ON THE MISSING FIREWORKS

(Newman et al. 2014)

28 THE JVLA TALE ON THE MISSING FIREWORKS

(Schreiber, MP et al. 2015)

29 THE JVLA TALE ON THE MISSING FIREWORKS

THEY END UP IN MS !

(Schreiber, MP et al. 2015)

30 THE JVLA TALE ON THE MISSING FIREWORKS

SED FITTING SFR ARE IN REASONABLE AGREEMENT WITH THE RADIO BASED ESTIMATES …

31 THE JVLA TALE ON THE MISSING FIREWORKS

SED FITTING SFR ARE IN REASONABLE AGREEMENT WITH THE RADIO BASED ESTIMATES …

32 THE JVLA TALE ON THE MISSING FIREWORKS

SED FITTING SFR ARE IN REASONABLE AGREEMENT WITH THE RADIO BASED ESTIMATES …

33 THE JVLA TALE ON THE MISSING FIREWORKS

SED FITTING SFR ARE IN REASONABLE AGREEMENT WITH THE RADIO BASED ESTIMATES …

34 THE JVLA TALE ON THE MISSING FIREWORKS

FROM FREAK TO ORDINARY: A SECOND LIFE FOR JKCS 041 ?

WITH “CORRECTED” QUIESCENT FRACTIONS ON THE MASSIVE END APPROACHING BALLPARK VALUES …

35 THE JVLA TALE ON THE MISSING FIREWORKS

WHAT IF THE RADIO EMISSION IS POWERED BY AGN?

— SHARP INCREASE OF CLUSTER AGN FRACTION WITH REDSHIFT ~1% at z=1 to ~40% at z=2 …

— CLUSTER vs. FIELD at z~2 ~40% vs. <10%

— RADIO AGN FEEDBACK IN ACTION ?

(Bufanda et al., 2017; see also Gupta, MP et al. 2019)

36 WHERE WE GOT SO FAR …

JVLA is at present our best shot to uncover massive galaxy SFRs

3 radio detections in the core of JKCS 041

Likely star formation driven events that if further confirmed would produce a new outlook of this remarkable structure

Measuring the gas content of these objects will make it possible to firmly confirm this picture

37 THE JVLA VIEW OF THE MISSING FIREWORKS

38 THE JVLA VIEW OF THE MISSING FIREWORKS

39 THE JVLA TALE ON THE MISSING FIREWORKS

Checking the radio-IR correlation

— prior based photometry of 24um

(MP et al. 2015)

40 THE JVLA TALE ON THE MISSING FIREWORKS

Checking the radio-IR correlation

— prior based photometry of 24um

— 24um to SFR sensitive to SFR-mode

Main Sequence SED

(MP et al. 2015)

41 THE JVLA TALE ON THE MISSING FIREWORKS

Checking the radio-IR correlation

— prior based photometry of 24um

— 24um to SFR sensitive to SFR-mode

Still consistent with SF driven radio emission …

Main Sequence SED Starburst SED

(MP et al. 2015)

42 THE JVLA TALE ON THE MISSING FIREWORKS

(Prichard et al. 2017)

43 THE JVLA TALE ON THE MISSING FIREWORKS

N

E R r = R500 ~ 1’ ~ 500500 kpc 20 arcsec 170 kpc @ z=1.8

255 275 272 289 286 281 317 332 356 352 355 375/376 411 359 447 387 404

531

657 This proposal

693

772

44