Characterizing the radio continuum nature of sources in the massive star-forming region W75N (B)

Rodriguez-Kamenetzky, A. (author): Instituto de Astronomía Teórica y Experimental (IATE)

Carrasco-Gonzalez, C. (author): Universidad Nacional Autónoma de México (UNAM),Universidad Nacional Autonoma de Mexico

Torrelles, J. M. (author): Agencia Estatal Consejo Superior de Investigaciones Científicas,Spanish National Research Council,Institut d'Estudis Espacials de Catalunya (IEEC),Institute of Space Studies of Catalonia (IEEC)

Vlemmings, Wouter, 1974 (author): Chalmers tekniska högskola,Chalmers University of Technology

Rodriguez, L. F. (author): Universidad Nacional Autónoma de México (UNAM),Universidad Nacional Autonoma de Mexico

Gomez, J. F. (author): Agencia Estatal Consejo Superior de Investigaciones Científicas,Spanish National Research Council

Canto, J. (author): Universidad Nacional Autónoma de México (UNAM),Universidad Nacional Autonoma de Mexico

Goddi, C. (author): Radboud Universiteit,Radboud University,Universiteit Leiden (UL),Leiden University (UL)

Anez-Lopez, N. (author): Agencia Estatal Consejo Superior de Investigaciones Científicas,Spanish National Research Council,Institut d'Estudis Espacials de Catalunya (IEEC),Institute of Space Studies of Catalonia (IEEC)

Curiel, S. (author): Universidad Nacional Autónoma de México (UNAM),Universidad Nacional Autonoma de Mexico

van Langevelde, H. J. (author): Universiteit Leiden (UL),Leiden University (UL),Joint Institute for VLBI in Europe (JIVE)

(creator_code:org_t)

2020-06-20
2020
English.
In: Monthly Notices of the Royal Astronomical Society. - : Oxford University Press (OUP). - 0035-8711 .- 1365-2966. ; 496:3, s. 3128-3141

Related links:: https://ri.conicet.g...; show more...; https://doi.org/10.1...; https://research.cha...; show less...

Abstract Subject headings

The massive star-forming region W75N (B) is thought to host a cluster of massive protostars (VLA 1, VLA 2, and VLA 3) undergoing different evolutionary stages. In this work, we present radio continuum data with the highest sensitivity and angular resolution obtained to date in this region, using the VLA-A and covering a wide range of frequencies (4-48 GHz), which allowed us to study the morphology and the nature of the emission of the different radio continuum sources. We also performed complementary studies with multi-epoch Very Large Array (VLA) data and Atacama Large Millimeter Array (ALMA) archive data at 1.3 mm wavelength. We find that VLA 1 is driving a thermal radio jet at scales of approximate to 0.1 arcsec (approximate to 130 au), but also shows signs of an incipient hypercompact HII region at scales of less than or similar to 1 arcsec (less than or similar to 1300 au). VLA 3 is also driving a thermal radio jet at scales of a few tenths of arcsec (few hundred of au). We conclude that this jet is shock exciting the radio continuum sources Bc and VLA 4 (obscured Herbig-Haro objects), which show proper motions moving outward from VLA 3 at velocities of approximate to 112-118 km s(-1). We have also detected three new weak radio continuum sources, two of them associated with millimetre continuum cores observed with ALMA, suggesting that these two sources are also embedded young stellar objects in this massive star-forming region.

NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Geofysik (hsv//swe)
NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Geophysics (hsv//eng)
NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Multidisciplinär geovetenskap (hsv//swe)
NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Geosciences, Multidisciplinary (hsv//eng)

By the author/editor: Rodriguez-Kamene ...; Carrasco-Gonzale ...; Torrelles, J. M.; Vlemmings, Woute ...; Rodriguez, L. F.; Surcis, G.; show more...; Gomez, J. F.; Canto, J.; Goddi, C.; Kim, J. S.; Kim, S-W; Anez-Lopez, N.; Curiel, S.; van Langevelde, ...; show less...

About the subject

NATURAL SCIENCES: NATURAL SCIENCES; and Physical Science ...; and Astronomy Astrop ...

NATURAL SCIENCES: NATURAL SCIENCES; and Earth and Relate ...; and Geophysics

NATURAL SCIENCES: NATURAL SCIENCES; and Earth and Relate ...; and Geosciences Mult ...

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