SIMBAD references

2009ApJ...697..787G - Astrophys. J., 697, 787-800 (2009/May-3)

The North American and Pelican nebulae. I. IRAC observations.

GUIEU S., REBULL L.M., STAUFFER J.R., HILLENBRAND L.A., CARPENTER J.M., NORIEGA-CRESPO A., PADGETT D.L., COLE D.M., CAREY S.J., STAPELFELDT K.R. and STROM S.E.

Abstract (from CDS):

We present a 9 deg2 map of the North American and Pelican Nebulae regions obtained in all four Infrared Array Camera (IRAC) channels with the Spitzer Space Telescope. The resulting photometry is merged with that at JHKs from Two Micron All Sky Survey and a more spatially limited BVI survey from previous ground-based work. We use a mixture of color-color diagrams to select a minimally contaminated set of more than 1600 objects that we claim are young stellar objects (YSOs) associated with the star-forming region. Because our selection technique uses infrared excess as a requirement, our sample is strongly biased against inclusion of Class III YSOs. The distribution of IRAC spectral slopes for our YSOs indicates that most of these objects are Class II, with a peak toward steeper spectral slopes but a substantial contribution from a tail of Flat spectrum and Class I type objects. By studying the small fraction of the sample that is optically visible, we infer a typical age of a few Myr for the low-mass population. The young stars are clustered, with about a third of them located in eight clusters that are located within or near the LDN 935 dark cloud. Half of the YSOs are located in regions with surface densities higher than 1000 YSOs/deg2. The Class I objects are more clustered than the Class II stars.

Abstract Copyright:

Journal keyword(s): circumstellar matter - infrared: ISM - infrared: stars - ISM: clouds - ISM: individual (NGC 7000, IC 5070) - stars: formation - stars: pre-main sequence

VizieR on-line data: <Available at CDS (J/ApJ/697/787): table4.dat>

Nomenclature: Table 3: [GRS2009] N (Nos 1-8). Table 4: [GRS2009] SST JHHMMSS.s+DDMMSS.s N=1657.

Simbad objects: 1686

goto Full paper

goto View the references in ADS

To bookmark this query, right click on this link: simbad:2009ApJ...697..787G and select 'bookmark this link' or equivalent in the popup menu


2022.09.25-13:11:31

© Université de Strasbourg/CNRS

    • Contact