J/A+A/581/A124 SFR IRAS 05137+3919 star and jet multiplicity (Cesaroni+, 2015) 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., Kulesa C. =2015A&A...581A.124C (SIMBAD/NED BibCode) ADC_Keywords: Associations, stellar ; Infrared sources Keywords: stars: early-type - stars: formation - ISM: jets and outflows Abstract: 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 80mas 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. Description: Near-IR images were taken in the night of December 12, 2009 with LUCI at the Large Binocular Telescope (Mount Graham, Arizona), through the standard broad-band filters H (?c=1.653um) and Ks (?c=2.163um), and the narrow-band filters FeII (?c=1.646um, including the [FeII] 1.64-um line) and H2 (?c=2.122um, including the H2v=1-0 S(1) line at 2.12um). Data were also collected on October 9 and 12, 2013, using the PISCES Near Infrared Camera installed at the focal plane of the First Light Adaptive Optics system of the Large Binocular Telescope. Ground-based diffraction-limited mid-infrared images at 8.9, 9.9, 12.7, and 18.7um of IRAS 05137+3919 were taken on the night of November 9, 2006 with the mid-infrared camera CID mounted on the 2.1m telescope of the Observatorio Astronomico Nacional at San Pedro Martir, Baja California, Mexico. File Summary: FileName Lrecl Records Explanations ReadMe 80 . This file tablea1.dat 63 1506 Coordinates, magnitudes, and colour of the sources identified in the LUCI field tablea2.dat 35 27 Coordinates and fluxes of the H2 knots belonging to Jet 1 tablea3.dat 35 14 Coordinates and fluxes of the H2 knots belonging to Jet 2 tablea4.dat 35 3 Coordinates and fluxes of the H2 knots belonging to Jet 3 tablea5.dat 63 173 Coordinates, magnitudes, and colour of the sources identified in the PISCES field Byte-by-byte Description of file: tablea[15].dat Bytes Format Units Label Explanations 1- 2 I2 h RAh Right ascension (J2000) 4- 5 I2 min RAm Right ascension (J2000) 7- 11 F5.2 s RAs Right ascension (J2000) 13 A1 --- DE- Declination sign (J2000) 14- 15 I2 deg DEd Declination (J2000) 17- 18 I2 arcmin DEm Declination (J2000) 20- 23 F4.1 arcsec DEs Declination (J2000) 25- 30 F6.3 mag Hmag ?=- H magnitude 32- 36 F5.3 mag e_Hmag ? rms uncertainty on Hmag 39- 44 F6.3 mag Ksmag ?=- Ks magnitude 46- 50 F5.3 mag e_Ksmag ? rms uncertainty on Ksmag 52- 57 F6.3 mag H-Ks ?=- H-Ks colour index 59- 63 F5.3 mag e_H-Ks ? rms uncertainty on H-Ks Byte-by-byte Description of file: tablea[234].dat Bytes Format Units Label Explanations 1- 2 I2 h RAh Right ascension (J2000) 4- 5 I2 min RAm Right ascension (J2000) 7- 12 F6.3 s RAs Right ascension (J2000) 14 A1 --- DE- Declination sign (J2000) 15- 16 I2 deg DEd Declination (J2000) 18- 19 I2 arcmin DEm Declination (J2000) 21- 25 F5.2 arcsec DEs Declination (J2000) 27- 31 F5.1 10-19W/m2 Flux Line emission flux on the final averaged (mosaiced) H2 (2.122um) image 33- 35 F3.1 10-19W/m2 e_Flux rms uncertainty on Flux History: From electronic version of the journal (End) Patricia Vannier [CDS] 25-Nov-2015