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The Spitzer c2d Survey of Large, Nearby, Interstellar Clouds. IV. Lupus
Observed with MIPS | | Nicholas L. Chapman
; Shih-Ping Lai
; Lee G. Mundy
; Neal J. Evans II
; Timothy Y. Brooke
; Lucas A. Cieza
; William J. Spiesman
; Luisa M. Rebull
; Karl R. Stapelfeldt
; Alberto Noriega-Crespo
; Lauranne Lanz
; Lori E. Allen
; Geoffrey A. Blake
; Tyler L. Bourke
; Paul M. Harvey
; Tracy L. Huard
; Jes K. Jørgensen
; David W. Koerner
; Philip C. Myers
; Deborah L. Padgett
; Annelia I. Sargent
; Peter Teuben
; Ewine F. van Dishoeck
; Zahed Wahhaj
; Kaisa E. Young
; | | Date: |
13 Jun 2007 | | Abstract: | We present maps of 7.78 square degrees of the Lupus molecular cloud complex
at 24, 70, and $160:mu$m. They were made with the Spitzer Space Telescope’s
Multiband Imaging Photometer for Spitzer (MIPS) instrument as part of the
Spitzer Legacy Program, ``From Molecular Cores to Planet-Forming Disks’’ (c2d).
The maps cover three separate regions in Lupus, denoted I, III, and IV. We
discuss the c2d pipeline and how our data processing differs from it. We
compare source counts in the three regions with two other data sets and
predicted star counts from the Wainscoat model. This comparison shows the
contribution from background galaxies in Lupus I. We also create two color
magnitude diagrams using the 2MASS and MIPS data. From these results, we can
identify background galaxies and distinguish them from probable young stellar
objects. The sources in our catalogs are classified based on their spectral
energy distribution (SED) from 2MASS and Spitzer wavelengths to create a sample
of young stellar object candidates. From 2MASS data, we create extinction maps
for each region and note a strong corresponence between the extinction and the
$160:mu$m emission. The masses we derived in each Lupus cloud from our
extinction maps are compared to masses estimated from $^{13}$CO and C$^{18}$O
and found to be similar to our extinction masses in some regions, but
significantly different in others. Finally, based on our color-magnitude
diagrams, we selected 12 of our reddest candidate young stellar objects for
individual discussion. Five of the 12 appear to be newly-discovered YSOs. | | Source: | arXiv, arxiv.0706.1809 | | Services: | Forum | Review | PDF | Favorites | |
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