J/A+A/605/A99 UBVRI images of Barnard 207 (Togi+, 2017)
Dust properties of the cometary globule Barnard 207 (LDN1489).
Togi A., Witt A.N., St John D.
<Astron. Astrophys. 605, A99 (2017)>
=2017A&A...605A..99T 2017A&A...605A..99T (SIMBAD/NED BibCode)
ADC_Keywords: Bok globules; Globules; Molecular clouds; Photometry, UBVRI
Keywords: dust,emission, extinction - ISM: molecules - ISM: general -
ISM: individual objects: B207
Abstract:
Barnard 207 (B207, LDN 1489, LBN 777), also known as the Vulture Head
nebula, is a cometary globule in the Taurus-Auriga-Perseus Molecular
Cloud region. B207 is known to host a Class I protostar,
IRAS 04016+2610, located at a projected distance of ∼8400au from the
dense core centre. Using imaging and photometry over a wide wavelength
range, from UV to sub-mm, we study the physical properties of B207 and
the dust grains contained within. The core density, temperature, and
mass are typical of other globules found in the Milky Way interstellar
medium (ISM). The increase in the dust albedo with increasing optical
wavelengths, along with the detection of coreshine in the near
infrared, indicates the presence of larger dust grains in B207. The
measured optical, near-, mid- and far-infrared intensities are in
agreement with the CMM+AMM and CMM+AMMI dust grain type of the THEMIS
model, suggesting mantle formation on the dust grains throughout the
globule. We investigate the possibility of turbulence being
responsible for diffusing dust grains from the central core to
external outer layers of B207. However, in situ formation of large
dust grains cannot be excluded.
Description:
Reduced optical FITS file for B207. The images were obtained with the
Large Monolithic Imager (LMI) instrument onboard the Discovery Channel
Telescope (DCT).
Objects:
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RA (2000) DE Designation(s)
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04 04 47.5 +26 19 42 B207 = Barnard 207
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
list.dat 93 5 List of fits images
fits/* . 5 Individual fits images
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Byte-by-byte Description of file: list.dat
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Bytes Format Units Label Explanations
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1- 9 F9.5 deg RAdeg Right Ascension of center (J2000)
10- 18 F9.5 deg DEdeg Declination of center (J2000)
20- 24 F5.3 arcsec/pix Scale Scale of the image
26- 29 I4 --- Nx Number of pixels along X-axis
31- 34 I4 --- Ny Number of pixels along Y-axis
36- 57 A22 --- Obs.Date Observatiob date (YYYY-MM-DDThh:mm:ss.ss)
59- 63 I5 Kibyte size Size of FITS file
65- 75 A11 --- FileName Name of FITS file, in subdirectory fits
77- 93 A17 --- Title Title of the FITS file
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Acknowledgements:
Aditya Togi, aditya.togi(at)utoledo.edu
(End) Patricia Vannier [CDS] 20-Jul-2017