A close-up view of a bipolar jet: Sub-arcsecond near-infrared imaging of the high-mass protostar IRAS 20126+4104

R. Cesaroni, F. Massi, C. Arcidiacono, M. T. Beltrán, Donald W Mccarthy, C. Kulesa, K. Boutsia, D. Paris, F. Quirós-Pacheco, M. Xompero

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

Context. The formation of OB-type stars up to (at least) 140 M can be explained via disk-mediated accretion and in fact growing observational evidence of disk-jet systems is found in high-mass star-forming regions. Aims. With the present observations we wish to investigate at sub-arcsecond resolution the jet structure close to the well studied high-mass protostar IRAS 20126+4104, which is known to be surrounded by a Keplerian disk. Methods. Adaptive optics imaging of the 2.2 μm continuum and H2 and Brγ line emission have been performed with the Large Binocular Telescope, attaining an angular resolution of ∼90 mas and an astrometric precision of ∼100 mas. Results. While our results are consistent with previous K-band images by other authors, the improved (by a factor ∼3) resolution allows us to identify a number of previously unseen features, such as bow shocks spread all over the jet structure. Also, we confirm the existence of a bipolar nebulosity within 1″ from the protostar, prove that the emission from the brightest, SE lobe is mostly due to the H2 line, and resolve its structure. Conclusions. Comparison with other tracers such as masers, thermal molecular line emission, and free-free continuum emission proves that the bipolar nebulosity is indeed tracing the root of the bipolar jet powered by the deeply embedded protostar at the center of the Keplerian disk.

Original languageEnglish (US)
Article numberA146
JournalAstronomy and Astrophysics
Volume549
DOIs
StatePublished - 2013

Fingerprint

protostars
Infrared Astronomy Satellite
near infrared
continuums
stars
bows
masers
tracing
extremely high frequencies
angular resolution
adaptive optics
accretion disks
lobes
tracers
tracer
shock
accretion
telescopes

Keywords

  • ISM: individual objects: IRAS 20126+4104
  • ISM: jets and outflows
  • Stars: formation

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

A close-up view of a bipolar jet : Sub-arcsecond near-infrared imaging of the high-mass protostar IRAS 20126+4104. / Cesaroni, R.; Massi, F.; Arcidiacono, C.; Beltrán, M. T.; Mccarthy, Donald W; Kulesa, C.; Boutsia, K.; Paris, D.; Quirós-Pacheco, F.; Xompero, M.

In: Astronomy and Astrophysics, Vol. 549, A146, 2013.

Research output: Contribution to journalArticle

Cesaroni, R, Massi, F, Arcidiacono, C, Beltrán, MT, Mccarthy, DW, Kulesa, C, Boutsia, K, Paris, D, Quirós-Pacheco, F & Xompero, M 2013, 'A close-up view of a bipolar jet: Sub-arcsecond near-infrared imaging of the high-mass protostar IRAS 20126+4104', Astronomy and Astrophysics, vol. 549, A146. https://doi.org/10.1051/0004-6361/201220609
Cesaroni, R. ; Massi, F. ; Arcidiacono, C. ; Beltrán, M. T. ; Mccarthy, Donald W ; Kulesa, C. ; Boutsia, K. ; Paris, D. ; Quirós-Pacheco, F. ; Xompero, M. / A close-up view of a bipolar jet : Sub-arcsecond near-infrared imaging of the high-mass protostar IRAS 20126+4104. In: Astronomy and Astrophysics. 2013 ; Vol. 549.
@article{a7d48f0df84f4b9d92adfa94eba68192,
title = "A close-up view of a bipolar jet: Sub-arcsecond near-infrared imaging of the high-mass protostar IRAS 20126+4104",
abstract = "Context. The formation of OB-type stars up to (at least) 140 M ⊙ can be explained via disk-mediated accretion and in fact growing observational evidence of disk-jet systems is found in high-mass star-forming regions. Aims. With the present observations we wish to investigate at sub-arcsecond resolution the jet structure close to the well studied high-mass protostar IRAS 20126+4104, which is known to be surrounded by a Keplerian disk. Methods. Adaptive optics imaging of the 2.2 μm continuum and H2 and Brγ line emission have been performed with the Large Binocular Telescope, attaining an angular resolution of ∼90 mas and an astrometric precision of ∼100 mas. Results. While our results are consistent with previous K-band images by other authors, the improved (by a factor ∼3) resolution allows us to identify a number of previously unseen features, such as bow shocks spread all over the jet structure. Also, we confirm the existence of a bipolar nebulosity within 1″ from the protostar, prove that the emission from the brightest, SE lobe is mostly due to the H2 line, and resolve its structure. Conclusions. Comparison with other tracers such as masers, thermal molecular line emission, and free-free continuum emission proves that the bipolar nebulosity is indeed tracing the root of the bipolar jet powered by the deeply embedded protostar at the center of the Keplerian disk.",
keywords = "ISM: individual objects: IRAS 20126+4104, ISM: jets and outflows, Stars: formation",
author = "R. Cesaroni and F. Massi and C. Arcidiacono and Beltr{\'a}n, {M. T.} and Mccarthy, {Donald W} and C. Kulesa and K. Boutsia and D. Paris and F. Quir{\'o}s-Pacheco and M. Xompero",
year = "2013",
doi = "10.1051/0004-6361/201220609",
language = "English (US)",
volume = "549",
journal = "Astronomy and Astrophysics",
issn = "0004-6361",
publisher = "EDP Sciences",

}

TY - JOUR

T1 - A close-up view of a bipolar jet

T2 - Sub-arcsecond near-infrared imaging of the high-mass protostar IRAS 20126+4104

AU - Cesaroni, R.

AU - Massi, F.

AU - Arcidiacono, C.

AU - Beltrán, M. T.

AU - Mccarthy, Donald W

AU - Kulesa, C.

AU - Boutsia, K.

AU - Paris, D.

AU - Quirós-Pacheco, F.

AU - Xompero, M.

PY - 2013

Y1 - 2013

N2 - Context. The formation of OB-type stars up to (at least) 140 M ⊙ can be explained via disk-mediated accretion and in fact growing observational evidence of disk-jet systems is found in high-mass star-forming regions. Aims. With the present observations we wish to investigate at sub-arcsecond resolution the jet structure close to the well studied high-mass protostar IRAS 20126+4104, which is known to be surrounded by a Keplerian disk. Methods. Adaptive optics imaging of the 2.2 μm continuum and H2 and Brγ line emission have been performed with the Large Binocular Telescope, attaining an angular resolution of ∼90 mas and an astrometric precision of ∼100 mas. Results. While our results are consistent with previous K-band images by other authors, the improved (by a factor ∼3) resolution allows us to identify a number of previously unseen features, such as bow shocks spread all over the jet structure. Also, we confirm the existence of a bipolar nebulosity within 1″ from the protostar, prove that the emission from the brightest, SE lobe is mostly due to the H2 line, and resolve its structure. Conclusions. Comparison with other tracers such as masers, thermal molecular line emission, and free-free continuum emission proves that the bipolar nebulosity is indeed tracing the root of the bipolar jet powered by the deeply embedded protostar at the center of the Keplerian disk.

AB - Context. The formation of OB-type stars up to (at least) 140 M ⊙ can be explained via disk-mediated accretion and in fact growing observational evidence of disk-jet systems is found in high-mass star-forming regions. Aims. With the present observations we wish to investigate at sub-arcsecond resolution the jet structure close to the well studied high-mass protostar IRAS 20126+4104, which is known to be surrounded by a Keplerian disk. Methods. Adaptive optics imaging of the 2.2 μm continuum and H2 and Brγ line emission have been performed with the Large Binocular Telescope, attaining an angular resolution of ∼90 mas and an astrometric precision of ∼100 mas. Results. While our results are consistent with previous K-band images by other authors, the improved (by a factor ∼3) resolution allows us to identify a number of previously unseen features, such as bow shocks spread all over the jet structure. Also, we confirm the existence of a bipolar nebulosity within 1″ from the protostar, prove that the emission from the brightest, SE lobe is mostly due to the H2 line, and resolve its structure. Conclusions. Comparison with other tracers such as masers, thermal molecular line emission, and free-free continuum emission proves that the bipolar nebulosity is indeed tracing the root of the bipolar jet powered by the deeply embedded protostar at the center of the Keplerian disk.

KW - ISM: individual objects: IRAS 20126+4104

KW - ISM: jets and outflows

KW - Stars: formation

UR - http://www.scopus.com/inward/record.url?scp=84872581262&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84872581262&partnerID=8YFLogxK

U2 - 10.1051/0004-6361/201220609

DO - 10.1051/0004-6361/201220609

M3 - Article

AN - SCOPUS:84872581262

VL - 549

JO - Astronomy and Astrophysics

JF - Astronomy and Astrophysics

SN - 0004-6361

M1 - A146

ER -