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J/MNRAS/411/705 Galactic HII regions spectrophotometric dist. (Moises+, 2011)
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Beginning of ReadMe :J/MNRAS/411/705 Spectrophotometric distances of HII regions (Moises+, 2011)
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Spectrophotometric distances to Galactic H II regions.
Moises A.P., Damineli A., Figueredo E., Blum R.D., Conti P.S., Barbosa C.L.
<Mon. Not. R. Astron. Soc., 411, 705-760 (2011)>
=2011MNRAS.411..705M
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ADC_Keywords: H II regions ; Stars, distances ; Photometry, infrared
Keywords: stars: formation - H II regions - Galaxy: structure
Abstract:
We present a near-infrared study of the stellar content of 35 HII
regions in the Galactic plane, 24 of which have been classified as
giant H ii regions. We have selected these optically obscured
star-forming regions from the catalogues of Russeil (2003, Cat.
J/A+A/397/133), Conti & Crowther (2004MNRAS.355..899C) and Bica et al.
(2003, Cat. J/A+A/404/223). In this paper, we have used the
near-infrared domain J-, H- and Ks-band colour images to visually
inspect the sample. Also, we have used colour-colour and
colour-magnitude diagrams to indicate ionizing star candidates, as
well as the presence of young stellar objects such as classical
T Tauri stars and massive young stellar objects (MYSOs). We have
obtained Spitzer Infrared Array Camera images for each region to help
further characterize them. Spitzer and near-infrared morphology were
used to place each cluster in an evolutionary phase of development.
Spitzer photometry was also used to classify the MYSOs.
Description:
The J-band (lambda1.28um, deltalambda=0.3um), H-band (lambda1.63um,
deltalambda=0.3um) and Ks-band (lambda2.19um, deltalambda=0.4um)
images were obtained on the nights of 1999 May 1, 4 and 20, 2000 May
19 and 21 and 2001 July 10 and 12, at the Cerro Tololo Inter-American
Observatory (CTIO) 4-m Blanco telescope, using the facility's infrared
imager OSIRIS, which has a field of view (FOV) of 93x93arcsec^2^ and a
pixel scale of 0.161arcsec/pixel. On the nights of 2005 Jult 3-6 and
11 and 2006 June 3-7, we obtained images using the facility's infrared
imager ISPI (with a FOV of 10.25x10.25arcmin^2^ and a pixel scale of
0.3arcsec/pix), also at the 4-m Blanco telescope. Also, on the nights
of 1998 August 28 and 29, we obtained images on the CTIO 4-m telescope
using the facility's infrared imager CIRIM (with a FOV of
102x102arcsec^2^ and a pixel scale of 0.40arcsec/pix).