A Galactic survey of radio jets from MYSOs Virtual Observatory Resource

Authors
  1. Purser S.J.D.
  2. Lumsden S.L.
  3. Hoare M.G.
  4. Kurtz S.
  5. Published by
    CDS
Abstract

In conjunction with a previous southern-hemisphere work, we present the largest radio survey of jets from massive protostars to date with high-resolution (~0.04 arcsec) Jansky Very Large Array observations towards two subsamples of massive star-forming regions of different evolutionary statuses: 48 infrared-bright, massive, young, stellar objects (MYSOs) and 8 infrared dark clouds (IRDCs) containing 16 luminous (L_bol_> 10^3L_{sun}_) cores. For 94 per cent of the MYSO sample, we detect thermal radio ({alpha} >= -0.1 whereby S_{nu}_ {prop.to} {nu}^{alpha}^) sources coincident with the protostar, of which 84 per cent (13 jets and 25 candidates) are jet like. Radio luminosity is found to scale with L_ bol_ similarly to the low-mass case supporting a common mechanism for jet production across all masses. Associated radio lobes tracing shocks are seen towards 52 per cent of jet-like objects and are preferentially detected towards jets of higher radio and bolometric luminosities, resulting from our sensitivity limitations. We find jet mass-loss rate scales with bolometric luminosity as dM_jet_/dt {prop.to} L_bol_^0.9+/- 0.2^, thereby discarding radiative, line-driving mechanisms as the dominant jet-launching process. Calculated momenta show that the majority of jets are mechanically capable of driving the massive, molecular outflow phenomena since p_jet_ > p_outflow_. Finally, from their physical extent we show that the radio emission cannot originate from small, optically thick H II regions. Towards the IRDC cores, we observe increasing incidence rates/radio fluxes with age using the proxy of increasing luminosity-to-mass (L/M) and decreasing infrared flux ratios (S_70um_/S_24um_). Cores with (L/M)< 40 L_{sun}_/M_{sun}_ are not detected above (5.8 GHz) radio luminosities of ~1 mJy kpc^2^.

Keywords
  1. star-forming-regions
  2. galaxies
  3. photometry
  4. young-stellar-objects
  5. protostars
  6. molecular-clouds
  7. radio-sources
  8. infrared-sources
Bibliographic source Bibcode
2021MNRAS.504..338P
See also HTML
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/504/338
IVOA Identifier IVOID
ivo://CDS.VizieR/J/MNRAS/504/338
Document Object Identifer DOI
doi:10.26093/cds/vizier.75040338

Access

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http://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/504/338
https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/504/338
http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/504/338
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http://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/504/338/table1?
https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/504/338/table1?
http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/504/338/table1?
IVOA Cone Search SCS
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http://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/504/338/table2?
https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/504/338/table2?
http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/504/338/table2?
IVOA Cone Search SCS
For use with a cone search client (e.g., TOPCAT).
http://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/504/338/tablea2?
https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/504/338/tablea2?
http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/504/338/tablea2?
IVOA Cone Search SCS
For use with a cone search client (e.g., TOPCAT).
http://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/504/338/tablea3?
https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/504/338/tablea3?
http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/504/338/tablea3?

History

2024-05-14T08:55:23Z
Resource record created
2024-05-14T08:55:23Z
Created
2024-09-18T20:19:46Z
Updated

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