|
| | | | |
| | | |
| Stat |
Members: 3645
Articles: 2'501'711
Articles rated: 2609
19 April 2024 |
|
| | | | |
|
Article overview
| |
|
|
Mid-infrared interferometry of massive young stellar objects. I. VLTI and Subaru observations of the enigmatic object M8E-IR | | H. Linz
; Th. Henning
; M. Feldt
; I. Pascucci
; R. van Boekel
; A. Men'shchikov
; B. Stecklum
; O. Chesneau
; Th. Ratzka
; S.P. Quanz
; Ch. Leinert
; R. Waters
; H. Zinnecker
; | | Date: |
2 Jul 2009 | | Abstract: | [abridged] Our knowledge of the inner structure of embedded massive young
stellar objects is still quite limited. We attempt here to overcome the spatial
resolution limitations of conventional thermal infrared imaging. We employed
mid-infrared interferometry using the MIDI instrument on the ESO/VLTI facility
for investigating M8E-IR, a well-known massive young stellar object suspected
of containing a circumstellar disk. Spectrally dispersed visibilities in the
8-13 micron range have been obtained at seven interferometric baselines. We
resolve the mid-infrared emission of M8E-IR and find typical sizes of the
emission regions of the order of 30 milli-arcseconds (~45 AU). Radiative
transfer simulations have been performed to interpret the data. The fitting of
the spectral energy distribution, in combination with the measured
visibilities, does not provide evidence for an extended circumstellar disk with
sizes > 100 AU but requires the presence of an extended envelope. The data are
not able to constrain the presence of a small-scale disk in addition to an
envelope. In any case, the interferometry measurements indicate the existence
of a strongly bloated, relatively cool central object, possibly tracing the
recent accretion history of M8E-IR. In addition, we present 24.5 micron images
that clearly distinguish between M8E-IR and the neighbouring ultracompact HII
region and which show the cometary-shaped infrared morphology of the latter
source. Our results show that IR interferometry, combined with radiative
transfer modelling, can be a viable tool to reveal crucial structure
information on embedded massive young stellar objects and to resolve
ambiguities arising from fitting the SED. | | Source: | arXiv, 0907.0445 | | Services: | Forum | Review | PDF | Favorites | |
|
|
No review found.
Did you like this article?
Note: answers to reviews or questions about the article must be posted in the forum section.
Authors are not allowed to review their own article. They can use the forum section.
browser Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)
|
| |
|
|
|
|
News, job offers and information for researchers and scientists:
| |
REGISTER