Ionized Jet Candidates Associated with Young High Massive … · 2015. 9. 29. · CMC MSX 8 μm IRAM 1.2 mm This Project: Sample Selection In addition some cores are associated with:

Ionized Jet Candidates Associated with Young

High Massive StarsViviana Rosero

NMT & Grote Reber Fellow NRAO, Socorro NM

Peter Hofner, NMTMark Claussen, NRAO

Stan Kurtz - CRyA, Mexico

Karl Menten - MPIfR Bonn, Germany

Friedrich Wyrowski - MPIfR Bonn, Germany

Esteban Araya - Western Illinois Univ., USA

Carlos Carrasco - MPIfR Bonn, Germany

Luis F. Rodríguez - CRyA, Mexico

Riccardo Cesaroni - INAF, Italy

Laurent Loinard - CRyA, Mexico

Simon Ellingson - UTAS, Australia

Sergio Molinari - INAF-IAPS, Italy

Collaborators

Puerto Varas, Chile, 03.19.15Viviana Rosero, NMT & NRAO

Thermal Jets

Ionized jets are predicted to occur at the base of the molecular outflowSmall number of ionized jets from young massive objects (YMOs) detected to dateDetections of ionized jets and disks help to complete the picture of massive star formation

Beuther et al. 2002

~ 1.3 pc

~ 0.1 pc

A B C

18566+0408

D

Rosero et al. In preparation

Viviana Rosero, NMT & NRAO

Motivation

Are jets a common phenomena among high mass YSOs?

Is there are a common origin of jets in YSOs of different luminosities?

Does the association of cores with radio continuum indicate an evolutionary sequence?


MotivationPrevious Work

Evolutionary sequence of IR sources and their association (or not) with radio continuum (e.g., Molinari et al. 1996, 1998, 2000; Rathborne et al. 2006; Chambers et al. 2009)

Jets occurrence rate towards YMOs of is ~38% (Guzmán et al. 2012)

L > 2⇥ 104L�


CMC

MSX 8 μmIRAM 1.2 mm

This Project: Sample Selection

In addition some cores are associated with: Maser (CH3OH and H2O) emission Outflows activity

Rathborne et al. 2006

CMCs: mm compact cores in IRDCs (Rathborne et al. 2006)

CMC-IR: mm compact cores in IRDCs associated with 24 μm point sources (Rathborne et al. 2006 and Chambers et al. 2009)

HMCs: Heated by luminous, embedded protostar (Sridharan et al. 2002)


This Project: Sample Selection

In addition some cores are associated with: Maser (CH3OH and H2O) emission Outflows activity

CMC-IR

MSX 8 μmIRAM 1.2 mm

Rathborne et al. 2006

CMCs: mm compact cores in IRDCs (Rathborne et al. 2006)

CMC-IR: mm compact cores in IRDCs associated with 24 μm point sources (Rathborne et al. 2006 and Chambers et al. 2009)

HMCs: Heated by luminous, embedded protostar (Sridharan et al. 2002)


VLA Survey: Sensitivity Previous Studies This Survey

Center Frequency (GHz): 4.9, 7.4, 20.9, 25.5rms: 3 - 10 μJy/beamResolution ~ 0.5”


VLA Survey: Sensitivity Previous Studies This Survey


5 GHzrms~ 0.4 mJy/bmResolution ~ 1.5’’B configuration

4.9, 7.4 GHzrms~ 5 μJy/bm Resolution ~ 0.4’’A configuration

VLA Massive Protostar Survey: Jet candidates C-band images, ~5 μJy/beam rms, ~0.4” angular resolution

Right Ascension (J2000)

[3, 4, 6, 8, 9, 12, 18, 22, 26] x 4e-06

~21000 AU

[3.5, 6, 9, 11, 12, 15, 20, 30, 40, 50] x 4e-06

~7000 AU

[3, 4, 5, 9, 12, 15] x 5.5e-06

~11000 AU

~8000 AU

[3, 10, 22, 60, 120, 190, 300] x 4.5e-06

~10000 AU

[3, 7, 12, 20, 30, 40] x 5e-06

Dec

linat

ion

(J20

00)

[3, 3.5, 4, 5, 6, 7, 9, 11, 13] x 5.0e-06

~9000 AU

VLA Massive Protostar Survey: Jet candidates C-band images, ~5 μJy/beam rms, ~0.4” angular resolution

Right Ascension (J2000)

[3, 4, 6, 8, 9, 12, 18, 22, 26] x 4e-06

~21000 AU

[3.5, 6, 9, 11, 12, 15, 20, 30, 40, 50] x 4e-06

~7000 AU

[3, 4, 5, 9, 12, 15] x 5.5e-06

~11000 AU

~8000 AU

[3, 10, 22, 60, 120, 190, 300] x 4.5e-06

~10000 AU

[3, 7, 12, 20, 30, 40] x 5e-06

Dec

linat

ion

(J20

00)

[3, 3.5, 4, 5, 6, 7, 9, 11, 13] x 5.0e-06

~9000 AU

Rosero et al. 2014

56 regions

Detection criterion:

Detections:

1/18 CMC: 6%

8/15 CMC-IR: 53%

21/23 HMC: 91%

Survey: Preliminary Results

Age

?

I⌫ > 5�


Survey: Preliminary Results

67 components

54 components 12 components

HI-GAL Data: Luminosities

CMC

CMC-IR

HMC

Resolution Credit: S. Molinari; R. Cesaroni

G28.53-mm1

G34.43-mm1

IRAS 18566+0408

3000Viviana Rosero, NMT & NRAO

Radio Continuum vs Bolometric Luminosity correlation

Radio Continuum vs Bolometric Luminosity correlation

Radio continuum vs Molecular outflow correlation

Fit low luminosity objects: Anglada et al. 1992

Mom

entu

m R

ate

of th

e O

utflo

w

Radio Luminosity of the Jet

Summary

Starless cores: sensitivity issue or age stage?

High detection rate of radio continuum towards cores associated with IR, some with multiple radio components

Ionized jets might have a common origin among YSOs of any given luminosity

Conclusive results need kinematic information


Documents

Ionized Jet Candidates Associated with Young High Massive … · 2015. 9. 29. · CMC MSX 8 μm IRAM 1.2 mm This Project: Sample Selection In addition some cores are associated with: