Star and jet multiplicity in the high-mass star forming region IRAS 05137+3919

R. Cesaroni, F. Massi, C. Arcidiacono, M. T. Beltrán, P. Persi, M. Tapia, S. Molinari, L. Testi, L. Busoni, A. Riccardi, K. Boutsia, S. Bisogni, Donald W Mccarthy, C. Kulesa

Research output: Contribution to journalArticle

Abstract

Context. We present a study of the complex high-mass star forming region IRAS 05137+3919 (also known as Mol8), where multiple jets and a rich stellar cluster have been described in previous works. Aims. Our goal is to determine the number of jets and shed light on their origin, and thus determine the nature of the young stars powering these jets. We also wish to analyse the stellar clusters by resolving the brightest group of stars. Methods. The star forming region was observed in various tracers and the results were complemented with ancillary archival data. The new data represent a substantial improvement over previous studies both in resolution and frequency coverage. In particular, adaptive optics provides us with an angular resolution of 80 mas in the near IR, while new mid- and far-IR data allow us to sample the peak of the spectral energy distribution and thus reliably estimate the bolometric luminosity. Results. Thanks to the near-IR continuum and millimetre line data we can determine the structure and velocity field of the bipolar jets and outflows in this star forming region. We also find that the stars are grouped into three clusters and the jets originate in the richest of these, whose luminosity is ~ 2.4 × 10<sup>4</sup>L Interestingly, our high-resolution near-IR images allow us to resolve one of the two brightest stars (A and B) of the cluster into a double source (A1+A2). Conclusions. We confirm that there are two jets and establish that they are powered by B-type stars belonging to cluster C1. On this basis and on morphological and kinematical arguments, we conclude that the less extended jet is almost perpendicular to the line of sight and that it originates in the brightest star of the cluster, while the more extended one appears to be associated with the more extincted, double source A1+A2. We propose that this is not a binary system, but a small bipolar reflection nebula at the root of the large-scale jet, outlining a still undetected circumstellar disk. The gas kinematics on a scale of ~0.2 pc seems to support our hypothesis, because it appears to trace rotation about the axis of the associated jet.

Original languageEnglish (US)
Article numberA133
JournalAstronomy and Astrophysics
Volume581
DOIs
StatePublished - Sep 1 2015

Fingerprint

Infrared Astronomy Satellite
stars
luminosity
reflection nebulae
sheds
spectral energy distribution
angular resolution
adaptive optics
line of sight
tracers
outflow
kinematics
velocity distribution
tracer
continuums
high resolution
estimates
gases
gas

Keywords

  • ISM: jets and outflows
  • Stars: early-type
  • Stars: formation

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Cesaroni, R., Massi, F., Arcidiacono, C., Beltrán, M. T., Persi, P., Tapia, M., ... Kulesa, C. (2015). Star and jet multiplicity in the high-mass star forming region IRAS 05137+3919. Astronomy and Astrophysics, 581, [A133]. https://doi.org/10.1051/0004-6361/201526199

Star and jet multiplicity in the high-mass star forming region IRAS 05137+3919. / Cesaroni, R.; Massi, F.; Arcidiacono, C.; Beltrán, M. T.; Persi, P.; Tapia, M.; Molinari, S.; Testi, L.; Busoni, L.; Riccardi, A.; Boutsia, K.; Bisogni, S.; Mccarthy, Donald W; Kulesa, C.

In: Astronomy and Astrophysics, Vol. 581, A133, 01.09.2015.

Research output: Contribution to journalArticle

Cesaroni, R, Massi, F, Arcidiacono, C, Beltrán, MT, Persi, P, Tapia, M, Molinari, S, Testi, L, Busoni, L, Riccardi, A, Boutsia, K, Bisogni, S, Mccarthy, DW & Kulesa, C 2015, 'Star and jet multiplicity in the high-mass star forming region IRAS 05137+3919', Astronomy and Astrophysics, vol. 581, A133. https://doi.org/10.1051/0004-6361/201526199
Cesaroni R, Massi F, Arcidiacono C, Beltrán MT, Persi P, Tapia M et al. Star and jet multiplicity in the high-mass star forming region IRAS 05137+3919. Astronomy and Astrophysics. 2015 Sep 1;581. A133. https://doi.org/10.1051/0004-6361/201526199
Cesaroni, R. ; Massi, F. ; Arcidiacono, C. ; Beltrán, M. T. ; Persi, P. ; Tapia, M. ; Molinari, S. ; Testi, L. ; Busoni, L. ; Riccardi, A. ; Boutsia, K. ; Bisogni, S. ; Mccarthy, Donald W ; Kulesa, C. / Star and jet multiplicity in the high-mass star forming region IRAS 05137+3919. In: Astronomy and Astrophysics. 2015 ; Vol. 581.
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