Presentation is loading. Please wait.

Presentation is loading. Please wait.

Á L V A R O S Á N C H E Z M O N G E B A R C E L O N A - N O V E M B E R 23, 2006 Centimeter and Millimeter Emission from Selected High-Mass Star-Forming.

Published by Modified over 9 years ago

Similar presentations

Presentation on theme: "Á L V A R O S Á N C H E Z M O N G E B A R C E L O N A - N O V E M B E R 23, 2006 Centimeter and Millimeter Emission from Selected High-Mass Star-Forming."— Presentation transcript:

1 Á L V A R O S Á N C H E Z M O N G E B A R C E L O N A - N O V E M B E R 23, 2006 Centimeter and Millimeter Emission from Selected High-Mass Star-Forming Regions

2 ÁLVARO SÁNCHEZ MONGE - BARCELONA NOVEMBER 23, 2006 2 CENTIMETER AND MILLIMETER EMISSION FROM SELECTED HIGH-MASS STAR-FORMING REGIONS INTRODUCTION Isolated mode Typically, one star per core of dense gas Low-Mass Star-Forming Regions Clustered mode A group of stars in a single massive dense core Low-Mass Star-Forming Regions High-Mass Star-Forming Regions Our aim is to study YSOs forming in the surroundings of high-mass stars. We need to study the gas and dust condensations with: high-angular resolution. high sensitivity. STAR FORMATION

3 ÁLVARO SÁNCHEZ MONGE - BARCELONA NOVEMBER 23, 2006 3 CENTIMETER AND MILLIMETER EMISSION FROM SELECTED HIGH-MASS STAR-FORMING REGIONS SELECTION CRITERIA We need candidates to massive protostarsSelected from the lists compiled by Molinari et al. 1996 (A&A, 308, 573) Mueller et al. 2002 (ApJS, 143, 469) Sridharan et al. 2002 (ApJ, 634, L57) Distance  3.5 kpc We want to study the surroundings of high-mass star-forming regions. IRAS bolometric luminosity  1000 L  Strong millimeter emission in single-dish (I 1.2 mm  100 mJy beam -1 ) Weak centimeter emission (S 3.6 cm  10 mJy) to be sensitive to low-mass condensations of  1 M  to select intermediate/high-mass targetsto assures a young evolutionary stage of the massive star-forming region to assures that the HII region is not evolved enough to have disrupted the surrounding material For 10 regions we found no available cm & mm data in the literature

4 ÁLVARO SÁNCHEZ MONGE - BARCELONA NOVEMBER 23, 2006 4 CENTIMETER AND MILLIMETER EMISSION FROM SELECTED HIGH-MASS STAR-FORMING REGIONS OBSERVATIONS IRAM 30m MPIfR 117-element bolometer array MAMBO we map the dust continuum emission at 1.2 mm VLA (Very Large Array) we observed the radio-continuum emisson at 3.6 and 1.3 cm

5 ÁLVARO SÁNCHEZ MONGE - BARCELONA NOVEMBER 23, 2006 5 CENTIMETER AND MILLIMETER EMISSION FROM SELECTED HIGH-MASS STAR-FORMING REGIONS RESULTS centimeter sources detected in the survey with the flux density at 3.6 and 1.3 cm we can estimate the spectral index  12 can be classified as HII regions physical parameters of the UCHII regions

6 ÁLVARO SÁNCHEZ MONGE - BARCELONA NOVEMBER 23, 2006 6 CENTIMETER AND MILLIMETER EMISSION FROM SELECTED HIGH-MASS STAR-FORMING REGIONS YOUNG CLUSTERS centimeter compact sources millimeter emission 2MASS source with small infrared excess Young Cluster * * Klein et al. 2005 (ApJSS, 161, 361)

7 ÁLVARO SÁNCHEZ MONGE - BARCELONA NOVEMBER 23, 2006 7 CENTIMETER AND MILLIMETER EMISSION FROM SELECTED HIGH-MASS STAR-FORMING REGIONS IRAS 00117 + 6412 L = 1300 L  d = 1.8 kpc Spectral index (VLA 2+3): 0.5 ± 0.2 Spectral type: B 2 M dust = 40 M  NH 3 detected Black:3.6 cm White:1.3 cm Green:1.2 mm Crosses:2MASS sources Ellipse:IRAS ellipsoide Good Candidate to study interactions between YSOs

8 ÁLVARO SÁNCHEZ MONGE - BARCELONA NOVEMBER 23, 2006 8 CENTIMETER AND MILLIMETER EMISSION FROM SELECTED HIGH-MASS STAR-FORMING REGIONS IRAS 18171 - 1548 L = 7900 L  d = 2.6 kpc Spectral index (VLA 2): 0.4 ± 0.3 Spectral type: B 1 M dust = 160 M  Black:3.6 cm White:1.3 cm Green:1.2 mm Crosses:2MASS sources Ellipse:IRAS ellipsoide

9 ÁLVARO SÁNCHEZ MONGE - BARCELONA NOVEMBER 23, 2006 9 CENTIMETER AND MILLIMETER EMISSION FROM SELECTED HIGH-MASS STAR-FORMING REGIONS IRAS 19045 + 0813 L = 1600 L  d = 1.6 kpc Spectral index (VLA 8): 1.0 ± 0.3 Spectral type: B 2.5 M dust = 11 M  Black:3.6 cm White:1.3 cm Green:1.2 mm Crosses:2MASS sources Ellipse:IRAS ellipsoide

10 ÁLVARO SÁNCHEZ MONGE - BARCELONA NOVEMBER 23, 2006 10 CENTIMETER AND MILLIMETER EMISSION FROM SELECTED HIGH-MASS STAR-FORMING REGIONS EVOLVED PROTOCLUSTERS centimeter compact sources millimeter emission 2MASS source with high infrared excess Evolved ProtoCluster * * Klein et al. 2005 (ApJSS, 161, 361)

11 ÁLVARO SÁNCHEZ MONGE - BARCELONA NOVEMBER 23, 2006 11 CENTIMETER AND MILLIMETER EMISSION FROM SELECTED HIGH-MASS STAR-FORMING REGIONS IRAS 04579 + 4703 Spectral index (VLA 1): < 1.1 Spectral type: B 2.5 Black:3.6 cm White:1.3 cm Green:1.2 mm Crosses:2MASS sources Ellipse:IRAS ellipsoide L = 4000 L  d = 2.5 kpc M dust = 26 M  NH 3 detected

12 ÁLVARO SÁNCHEZ MONGE - BARCELONA NOVEMBER 23, 2006 12 CENTIMETER AND MILLIMETER EMISSION FROM SELECTED HIGH-MASS STAR-FORMING REGIONS NGC 7538 - IRS 9 Spectral index (VLA 2): > -1.3 Spectral type: B 1 L = 40000 L  d = 2.8 kpc Spectral index (VLA 3): > -0.1 Black:3.6 cm White:1.3 cm Green:1.2 mm Crosses:2MASS sources Ellipse:IRAS ellipsoide Blue lines:outflows Spectral type: B 1.5 M dust = 40 M  NH 3 detected

13 ÁLVARO SÁNCHEZ MONGE - BARCELONA NOVEMBER 23, 2006 13 CENTIMETER AND MILLIMETER EMISSION FROM SELECTED HIGH-MASS STAR-FORMING REGIONS PROTOCLUSTERS centimeter compact sources millimeter emission no 2MASS source associated ProtoCluster * * Klein et al. 2005 (ApJSS, 161, 361)

14 ÁLVARO SÁNCHEZ MONGE - BARCELONA NOVEMBER 23, 2006 14 CENTIMETER AND MILLIMETER EMISSION FROM SELECTED HIGH-MASS STAR-FORMING REGIONS IRAS 22198 + 6336 L = 1300 L  d = 1.3 kpc Spectral index (VLA 3): 1.3 ± 0.4 Spectral type: B 3 M dust = 25 M  NH 3 detected Black:3.6 cm White:1.3 cm Green:1.2 mm Crosses:2MASS sources Ellipse:IRAS ellipsoide The Youngest Massive Star of this Survey

15 ÁLVARO SÁNCHEZ MONGE - BARCELONA NOVEMBER 23, 2006 15 CENTIMETER AND MILLIMETER EMISSION FROM SELECTED HIGH-MASS STAR-FORMING REGIONS “EXTRA” centimeter emission displaced with respect to the millimeter emission no 2MASS associated “Extra”

16 ÁLVARO SÁNCHEZ MONGE - BARCELONA NOVEMBER 23, 2006 16 CENTIMETER AND MILLIMETER EMISSION FROM SELECTED HIGH-MASS STAR-FORMING REGIONS “EXTRA” (1) IRAS 20293 + 4007 IRAS 22187 + 5559 no 2MASS source millimeter emission displaced no 2MASS source millimeter emission displaced extended emission

17 ÁLVARO SÁNCHEZ MONGE - BARCELONA NOVEMBER 23, 2006 17 CENTIMETER AND MILLIMETER EMISSION FROM SELECTED HIGH-MASS STAR-FORMING REGIONS “EXTRA” (2) IRAS 23448 + 6010 IRAS 18123 - 1203 cluster of 2MASS sources millimeter emission displaced extended emission no 2MASS source millimeter emission displaced 3.6 cm emission displaced 1.3 cm emission displaced

18 ÁLVARO SÁNCHEZ MONGE - BARCELONA NOVEMBER 23, 2006 18 CENTIMETER AND MILLIMETER EMISSION FROM SELECTED HIGH-MASS STAR-FORMING REGIONS SUMMARY We have studied 10 regions at mm & cm wavelengths We have found 12 HII regions, most of them UCHII regions In all the cases, a B type star is required to ionize the gas We can classify the UCHII regions in different evolutionary stages IRAS 00117+6412 is a good candidate to study the surrounding material (a complete study of this source will be presented in Busquet et al.)

19 Á L V A R O S Á N C H E Z M O N G E B A R C E L O N A - N O V E M B E R 23, 2006 Thank You ! Centimeter and Millimeter Emission from Selected High-Mass Star-Forming Regions

Download ppt "Á L V A R O S Á N C H E Z M O N G E B A R C E L O N A - N O V E M B E R 23, 2006 Centimeter and Millimeter Emission from Selected High-Mass Star-Forming."

Similar presentations

High Resolution Observations in B1-IRS: ammonia, CCS and water masers Claire Chandler, NRAO José F. Gómez, LAEFF-INTA Thomas B. Kuiper, JPL José M. Torrelles,

High Resolution Observations in B1-IRS: ammonia, CCS and water masers Claire Chandler, NRAO José F. Gómez, LAEFF-INTA Thomas B. Kuiper, JPL José M. Torrelles,
Motivation 40 orbits of UDF observations with the ACS grism Spectra for every source in the field. Good S/N continuum detections to I(AB) ~ 27; about 30%

Motivation 40 orbits of UDF observations with the ACS grism Spectra for every source in the field. Good S/N continuum detections to I(AB) ~ 27; about 30%
References [1] Liseau R., Lorenzetti D., Nisini B. et al. 1992 A&A 265, 577 [2] Massi F., De Luca M., Elia D. et al. 2006 A&A, submitted 399,14 [3] C.A.

References [1] Liseau R., Lorenzetti D., Nisini B. et al A&A 265, 577 [2] Massi F., De Luca M., Elia D. et al A&A, submitted 399,14 [3] C.A.
Ammonia and CCS as diagnostic tools of low-mass protostars Ammonia and CCS as diagnostic tools of low-mass protostars Itziar de Gregorio-Monsalvo (ESO.

Ammonia and CCS as diagnostic tools of low-mass protostars Ammonia and CCS as diagnostic tools of low-mass protostars Itziar de Gregorio-Monsalvo (ESO.
From Pre-stellar Cores to Proto-stars: The Initial Conditions of Star Formation PHILIPPE ANDRE DEREK WARD-THOMPSON MARY BARSONY Reported by Fang Xiong,

From Pre-stellar Cores to Proto-stars: The Initial Conditions of Star Formation PHILIPPE ANDRE DEREK WARD-THOMPSON MARY BARSONY Reported by Fang Xiong,
Too Large and Overlooked? (Unexpected) Extended free-free emission towards massive star formation regions Steven Longmore (Harvard-Smithsonian Center for.

Too Large and Overlooked? (Unexpected) Extended free-free emission towards massive star formation regions Steven Longmore (Harvard-Smithsonian Center for.
Ionized and neutral gas in the starburst galaxy NGC 5253 Australia Telescope National Facility (ATNF, Australia) Galaxies in the Local Volume – Sydney.

Ionized and neutral gas in the starburst galaxy NGC 5253 Australia Telescope National Facility (ATNF, Australia) Galaxies in the Local Volume – Sydney.
Multi-band Infrared Mapping of the Galactic Nuclear Region Q. D. Wang (PI), H. Dong, D. Calzetti (Umass), Cotera (SETI), S. Stolovy, M. Muno, J. Mauerhan,

Multi-band Infrared Mapping of the Galactic Nuclear Region Q. D. Wang (PI), H. Dong, D. Calzetti (Umass), Cotera (SETI), S. Stolovy, M. Muno, J. Mauerhan,
NRAO Socorro 05/2009 Radio Continuum Studies of Massive Protostars Peter Hofner New Mexico Tech & NRAO.

NRAO Socorro 05/2009 Radio Continuum Studies of Massive Protostars Peter Hofner New Mexico Tech & NRAO.
A massive disk around the intermediate-mass young star AFGL 490 ? Katharina Schreyer (AIU Jena, Germany) Thomas Henning (MPIA Heidelberg, Germany) Floris.

A massive disk around the intermediate-mass young star AFGL 490 ? Katharina Schreyer (AIU Jena, Germany) Thomas Henning (MPIA Heidelberg, Germany) Floris.
Low-Mass Star Formation in a Small Group, L1251B Jeong-Eun Lee UCLA.

Low-Mass Star Formation in a Small Group, L1251B Jeong-Eun Lee UCLA.
Portrait of a Forming Massive Protocluster: NGC6334 I(N) Todd Hunter (NRAO/North American ALMA Science Center) Collaborators: Crystal Brogan (NRAO) Ken.

Portrait of a Forming Massive Protocluster: NGC6334 I(N) Todd Hunter (NRAO/North American ALMA Science Center) Collaborators: Crystal Brogan (NRAO) Ken.
Outflow, infall, and rotation in high-mass star forming regions

Outflow, infall, and rotation in high-mass star forming regions
SMA Observations of the Binary Protostar System in L723 Josep Miquel Girart 1, Ramp Rao 2, Robert Estalella 3 & Josep Mª Masqué 3 1 Institut de Ciències.

SMA Observations of the Binary Protostar System in L723 Josep Miquel Girart 1, Ramp Rao 2, Robert Estalella 3 & Josep Mª Masqué 3 1 Institut de Ciències.
Mini Workshop on Star Formation and Astrochemistry. Barcelona, 2006 November 23 1 Robert Estalella, Aina Palau, Maite Beltrán (UB) Paul T. P. Ho (CfA),

Mini Workshop on Star Formation and Astrochemistry. Barcelona, 2006 November 23 1 Robert Estalella, Aina Palau, Maite Beltrán (UB) Paul T. P. Ho (CfA),
School of something FACULTY OF OTHER School of Physics & Astronomy FACULTY OF MATHEMATICS & PHYSICAL SCIENCES AMI and Massive Star Formation Melvin Hoare.

School of something FACULTY OF OTHER School of Physics & Astronomy FACULTY OF MATHEMATICS & PHYSICAL SCIENCES AMI and Massive Star Formation Melvin Hoare.
Cambridge, June 13-16, 2005 A Study of Massive Proto- and Pre-stellar Candidates with the SEST Antenna Maite Beltrán Universitat de Barcelona J. Brand.

Cambridge, June 13-16, 2005 A Study of Massive Proto- and Pre-stellar Candidates with the SEST Antenna Maite Beltrán Universitat de Barcelona J. Brand.
Star formation across the mass spectrum Our understanding of low-mass (solar type with masses between 0.1 and 10 M SUN ) star formation has improved greatly.

Star formation across the mass spectrum Our understanding of low-mass (solar type with masses between 0.1 and 10 M SUN ) star formation has improved greatly.
IRAC/MIPS view of the ISM: PAHs dominate in IRAC Li & Draine (2001) dust emissivity model; only very strong (> 10 3 x avg.) radiation fields contribute.

IRAC/MIPS view of the ISM: PAHs dominate in IRAC Li & Draine (2001) dust emissivity model; only very strong (> 10 3 x avg.) radiation fields contribute.
Centimeter and Millimeter Observations of Very Young Binary and Multiple Systems -Orbital Motions and Mass Determination -Truncated Protoplanetary Disks.

Centimeter and Millimeter Observations of Very Young Binary and Multiple Systems -Orbital Motions and Mass Determination -Truncated Protoplanetary Disks.

Similar presentations

Ads by Google