2015A&A...581A.124C


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.04CEST02:35:19

2015A&A...581A.124C - Astronomy and Astrophysics, volume 581A, 124-124 (2015/9-1)

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

CESARONI R., MASSI F., ARCIDIACONO C., BELTRAN M.T., PERSI P., TAPIA M., MOLINARI S., TESTI L., BUSONI L., RICCARDI A., BOUTSIA K., BISOGNI S., McCARTHY D. and KULESA C.

Abstract (from CDS):

We present a study of the complex high-mass star forming region IRAS05137+3919 (also known as Mol8), where multiple jets and a rich stellar cluster have been described in previous works. 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. 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. 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 ∼2.4x104L. 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). 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 ∼0.2pc seems to support our hypothesis, because it appears to trace rotation about the axis of the associated jet.

Abstract Copyright:

Journal keyword(s): stars: early-type - stars: formation - ISM: jets and outflows

VizieR on-line data: <Available at CDS (J/A+A/581/A124): tablea1.dat tablea2.dat tablea3.dat tablea4.dat tablea5.dat>

Status at CDS:   All or part of tables of objects will not be ingested in SIMBAD.

Simbad objects: 7

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Number of rows : 7

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 * bet And PM* 01 09 43.92388 +35 37 14.0075 5.58 3.62 2.05 0.81 -0.19 M0+IIIa 533 0
2 * alf Aur SB* 05 16 41.35871 +45 59 52.7693 1.33 0.88 0.08 -0.52 -0.96 G3III: 1137 0
3 IRAS 05137+3919 Cld 05 17 13.3 +39 22 14           ~ 56 0
4 * alf Her ** 17 14 38.85818 +14 23 25.2262   4.51 3.06     M5Ib-II+G5III+F2V: 189 0
5 * alf Lyr dS* 18 36 56.33635 +38 47 01.2802 0.03 0.03 0.03 0.07 0.10 A0Va 2504 0
6 IRAS 20126+4104 Y*O 20 14 25.8816186803 +41 13 36.869078243           B2.5-B0.5 396 0
7 * gam Aqr PM* 22 21 39.3743974795 -01 23 14.417011100 3.65 3.791 3.834     A0V 159 0

    Equat.    Gal    SGal    Ecl

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2020.07.04-02:35:19

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