The RMS survey: mid-infrared observations of candidate massive YSOs in the southern hemisphere

Mottram, J. C.; Hoare, M. G.; Lumsden, S. L.; Oudmaijer, R. D.; Urquhart, J. S.; Sheret, T. L.; Clarke, A. J.; Allsopp, J.

doi:10.1051/0004-6361:20077663

Cited by 91 publications

(111 citation statements)

References 41 publications

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“…see Mottram et al 2007) have shown that source confusion may still be an issue. Every effort has been made to ensure that only the source of interest is included within these flux measurements, but it is possible that some unresolved sources may in fact contain more than one emitting object.…”

Section: Mipsgal Resultsmentioning

confidence: 99%

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The RMS survey: far-infrared photometry of young massive stars

Mottram

Hoare²,

Lumsden³

et al. 2010

A&A

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Context. The Red MSX Source (RMS) survey is a multi-wavelength campaign of follow-up observations of a colour-selected sample of candidate massive young stellar objects (MYSOs) in the galactic plane. This survey is returning the largest well-selected sample of MYSOs to date, while identifying other dust contaminant sources with similar mid-infrared colours including a large number of new ultra-compact (UC) H ii regions.Aims. To measure the far-infrared (IR) flux, which lies near the peak of the spectral energy distribution (SED) of MYSOs and UCH ii regions, so that, together with distance information, the luminosity of these sources can be obtained.Methods. Less than 50% of RMS sources are associated with IRAS point sources with detections at 60 μm and 100 μm, though the vast majority are visible in Spitzer MIPSGAL or IRAS Galaxy Atlas (IGA) images. However, standard aperture photometry is not appropriate for these data due to crowding of sources and strong spatially variable far-IR background emission in the galactic plane. A new technique using a 2-dimensional fit to the background in an annulus around each source is therefore used to obtain far-IR photometry for young RMS sources. Results. Far-IR fluxes are obtained for a total of 1113 RMS candidates identified as young sources. Of these 734 have flux measurements using IGA 60 μm and 100 μm images and 724 using MIPSGAL 70 μm images, with 345 having measurements in both data sets.

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Section: Mipsgal Resultsmentioning

confidence: 99%

“…In order to test this method, the results of aperture photometry and 2-D background fitting photometry were compared using TIMMI2 10.4 μm images from Mottram et al (2007) of sources in their "clean" subsample (see Fig. 4).…”

Section: Two Dimensional Background Fitting Photometrymentioning

confidence: 99%

The RMS survey: far-infrared photometry of young massive stars

Mottram

Hoare²,

Lumsden³

et al. 2010

A&A

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“…Referring to the IRAS infrared survey published in the Narrow-band Hα data retrieved from the SuperCOSMOS H-alpha Survey (SHS) 4 (Parker et al 2005), we have found the IRAS sources 13120−6310 and 13024−6158, whose radial velocity data were obtained from Mottram et al (2007) and Bronfman et al (1996), respectively. Correcting their heliocentric radial velocities to the LSR system, a radial velocity of V LSR = −25 km s −1 and V LSR = −27 km s −1 , respectively, was obtained for them.…”

Section: Agementioning

confidence: 98%

Members of Centaurus OB1 and NGC 4755: new spectroscopic and astrometric studies

Corti

Orellana

2013

A&A

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Context. An OB association is a gravitationally unbound group of stars. The identification of the members of the association is an important aspect of its study. There are few astrometric membership studies for OB associations, but the combination of these studies with astrophysical techniques becomes a very powerful tool for this type of research. Aims. We perform new spectroscopic and astrometric studies of the members of the association Centaurus OB1 (Cen OB1) and the open cluster NGC 4755. Methods. To carry out this study we used new spectroscopic optical observations obtained at CASLEO, and proper motion and photometric data from the Tycho-2 Catalogue and other databases available via the Internet.Results. With this investigation we found 52 members of Cen OB1 (l = 303.• 7, b = 0.• 4) and four members of NGC 4755 (l = 303.• 2, b = 2.• 5), an open cluster integrated into the Cen OB1 stellar association. The distance, heliocentric radial velocity, proper motion, and age of Cen OB1 are 2.6 ± 0.5 kpc, ∼−20 km s −1 , μ α cos δ = −4.78 ± 0.10 mas yr −1 , μ δ = −0.93 ± 0.10 mas yr −1 , and ∼20 × 10 6 years old, respectively. The same parameters found for NGC 4755 are 1.9 ± 0.5 kpc, −18 ± 2 km s −1 , μ α cos δ = −4.14 ± 0.19 mas yr −1 , μ δ = −1.09 ± 0.12 mas yr −1 , and ∼15 × 10 6 years old. The pulsars PSR J1253−5820 and PSR J1254−6150 could have been born as the result of supernovae explosions that occurred in the past by massive members of Cen OB1. We have seen Infrared Astronomical Satellite (IRAS) sources near Cen OB1, that show that star formation is still occurring. The age gradient observed between the different members of Cen OB1 makes it likely that the stellar association and IRAS sources represent different stages of a sequential formation process.

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“…Its position is just between the disk object and the southeastern point source (as expected). Mottram et al (2007), and the 18 diameter (red) circle marks the peak of the sub-mm emission as seen in our LABOCA map. A grid of J2000 coordinates is shown.…”

Section: Previous Detections Of the Disk Object As An Unresolved Poinmentioning

confidence: 99%

“…As the rather large aperture partly includes YSO 32.2-14, this value should be regarded as an upper limit to the sub-mm flux from the disk object. Mottram et al (2007).…”

Section: Construction Of the Spectral Energy Distributionmentioning

confidence: 99%

Detection of a large massive circumstellar disk around a high-mass young stellar object in the Carina Nebula

Preibisch

Ratzka

Gehring

et al. 2011

A&A

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Context. The characterization of circumstellar disks around young stellar objects can provide important information about the process of star formation and the possible formation of planetary systems. Aims. We investigate the spatial structure and the spectral energy distribution of a newly discovered edge-on circumstellar disk around an optically invisible young stellar object that is embedded in a dark cloud in the Carina Nebula. Methods. The disk object was serendipitously discovered in our deep near-IR imaging survey of the Carina Nebula obtained with HAWK-I at the ESO VLT. Whereas the object was detected as an apparently point-like source in earlier infrared observations, only the superb image quality (FWHM ≈ 0.5 ) of the HAWK-I data could reveal, for the first time, the peculiar morphology of the object. It consists of a very red point-like central source that is surrounded by a roughly spherical nebula, which is intersected by a remarkable dark lane through the center. We construct the spectral energy distribution of the object from 1 μm to 870 μm and perform a detailed radiative transfer modeling of the spectral energy distribution and the source morphology. Results. The observed object morphology in the near-IR images clearly suggests a young stellar object that is embedded in an extended, roughly spherical envelope and surrounded by a large circumstellar disk with a diameter of ≈5500 AU that is seen nearly edge-on. The radiative transfer modeling shows that the central object is highly luminous and thus must be a massive young stellar object, most likely in the range 10−15 M . The circumstellar disk has a mass of about 2 M . Conclusions. The disk object in Carina is one of the most massive young stellar objects for which a circumstellar disk has been detected so far. The size and mass of the disk are very large compared to the corresponding values found for most other similar objects. These results support the assumption that 10−15 M stars can form via accretion from a circumstellar disk.

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The RMS survey: mid-infrared observations of candidate massive YSOs in the southern hemisphere

Cited by 91 publications

References 41 publications

The RMS survey: far-infrared photometry of young massive stars

The RMS survey: far-infrared photometry of young massive stars

Members of Centaurus OB1 and NGC 4755: new spectroscopic and astrometric studies

Detection of a large massive circumstellar disk around a high-mass young stellar object in the Carina Nebula

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