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J/ApJS/193/25       The NAN complex. II. MIPS observations       (Rebull+, 2011)

The North American and Pelican nebulae. II. MIPS observations and analysis. Rebull L.M., Guieu S., Stauffer J.R., Hillenbrand L.A., Noriega-Crespo A., Stapelfeldt K.R., Carey S.J., Carpenter J.M., Cole D.M., Padgett D.L., Strom S.E., Wolff S.C. <Astrophys. J. Suppl. Ser., 193, 25 (2011)> =2011ApJS..193...25R
ADC_Keywords: YSOs ; Photometry, infrared ; Nebulae ; Cross identifications Keywords: circumstellar matter - infrared: ISM - infrared: stars - ISM: clouds - ISM: individual objects (NGC 7000, IC 5070, LDN 935) - stars: formation - stars: pre-main sequence Abstract: We present observations of ∼7deg2 of the North American and Pelican Nebulae region at 24, 70, and 160um with the Spitzer Space Telescope Multiband I] ing Photometer for Spitzer (MIPS). We incorporate the MIPS observations with earlier Spitzer Infrared Array Camera (IRAC) observations, as well as archival near-infrared (IR) and optical data. We use the MIPS data to identify 1286 young stellar object (YSO) candidates. IRAC data alone can identify 806 more YSO candidates, for a total of 2076 YSO candidates. Prior to the Spitzer observations, there were only ∼200 YSOs known in this region. Three subregions within the complex are highlighted as clusters: the Gulf of Mexico, the Pelican, and the Pelican's Hat. The Gulf of Mexico cluster is subject to the highest extinction (AV at least ∼30) and has the widest range of infrared colors of the three clusters, including the largest excesses and by far the most point-source detections at 70um. Just 3% of the cluster members were previously identified; we have redefined this cluster as about 10-100 times larger (in projected area) than was previously realized. Description: The MIPS observations of the NAN complex were conducted in two epochs. The first (and largest) component took place on 2006 June 10-11 and covered ∼6deg2 in the region of highest extinction (see additional discussion in Guieu et al., 2009, Cat. J/ApJ/697/787). These observations were part of Spitzer program id 20015 (PI: L. Rebull). Additional observations were obtained on 2008 June 24 as part of program 462 (PI: L. Rebull). File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table3.dat 187 1286 Complete list of YSOs I. Spitzer measurements table4.dat 82 1286 Complete list of YSOs II. YSO criteria table8.dat 187 796 IRAC-selected YSOs not recovered by our MIPS-based search table9.dat 187 114 Previously suggested YSOs not recovered by our MIPS or IRAC searches
See also: II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003) II/196 : Vilnius Photometry in two Nebulae (Straizys et al., 1993) J/BaltA/18/141 : North America/Pelican red clump giants ugriJHK (Straizys+, 2009) J/ApJ/697/787 : The NAN complex. I. IRAC observations (Guieu et al., 2009) J/BaltA/17/1 : Infrared photometry in GL490 star-forming region (Straizys+ 2008) J/BaltA/17/125 : Interstellar reddening in 3 HII regions (Straizys+, 2008) J/BaltA/15/483 : Vilnius photometry in LDN 935 (Laugalys+, 2006) J/A+A/419/149 : UBV(I)c photometry of NGC 6996 (Villanova+, 2004) J/A+AS/104/557 : uvby-beta photometry in star-forming regions (Terranegra+ 1994) Byte-by-byte Description of file: table[389].dat
Bytes Format Units Label Explanations
1- 18 A18 --- [RGS2011] Source name ( on J2000) 20- 29 F10.6 deg RAdeg Right Ascension in decimal degrees (J2000) 31- 39 F9.6 deg DEdeg Declination in decimal degrees (J2000) 41- 56 A16 --- 2MASS 2MASS name (HHMMSSss+DDMMSSs) 58- 80 A23 --- AName Alternate name 82- 93 A12 --- SpType MK spectral type 95-116 A22 --- r_SpType Reference for SpType (1) 118 A1 --- l_[3.6] Limit flag on 3.6] 119-123 F5.2 mag [3.6] ? Spitzer/IRAC 3.6 micron band magnitude 125-128 F4.2 mag e_[3.6] ? Uncertainty in 3.6mag 130 A1 --- l_[4.5] Limit flag on 4.5] 131-135 F5.2 mag [4.5] ? Spitzer/IRAC 4.5 micron band magnitude 137-140 F4.2 mag e_[4.5] ? Uncertainty in 4.5mag 142 A1 --- l_[5.8] Limit flag on 5.8] 143-147 F5.2 mag [5.8] ? Spitzer/IRAC 5.8 micron band magnitude 149-152 F4.2 mag e_[5.8] ? Uncertainty in 5.8mag 154 A1 --- l_[8.0] Limit flag on 8.0] 155-159 F5.2 mag [8.0] ? Spitzer/IRAC 8.0 micron band magnitude 161-164 F4.2 mag e_[8.0] ? Uncertainty in 8.0mag 166 A1 --- l_[24] Limit flag on 24] 167-171 F5.2 mag [24] ? Spitzer/MIPS 24 micron band magnitude 173-176 F4.2 mag e_[24] ? Uncertainty in 24mag 178-182 F5.2 mag [70] ? Spitzer/MIPS 70 micron band magnitude 184-187 F4.2 mag e_[70] ? Uncertainty in 70mag
Note (1): References as follows: BallyScoville = 1980ApJ...239..121B CohenKuhi79 = 1979ApJS...41..743C Comeron05 = 2005A&A...430..541C; <[CP2005] NN> in Simbad Corbally09 = 2009BaltA..18..111C; <[CSL2009] CSL N> in Simbad Laugalys02 = 2002BaltA..11..205L Laugalys06a = 2006BaltA..15..483L (Cat. J/BaltA/15/483; <[LSV2006] Area II NNN> in Simbad) Laugalys06b = 2006BaltA..15..327L MerrillBurwell49 = 1949ApJ...110..387M Ogura2002 = 2002AJ....123.2597O (Cat. J/AJ/123/2597; <[OSP2002] BRC 31 NN> in Simbad) Shevchenko93 = 1993Ap&SS.202..121S SIMBAD = Straizys08a = 2008BaltA..17....1S (Cat. J/BaltA/17/1) Straizys08b = 2008BaltA..17..143S; <[SL2008c] NN> in Simbad Straizys09 = 2009BaltA..18..141S (Cat. J/BaltA/18/141) Straizys89 = 1989VilOB..83....3S Straizys93 = 1993BaltA...2..171S (Cat. II/196) Straizys99 = 1999BaltA...8..355S Terranegra94 = 1994A&AS..104..557T (Cat. J/A+AS/104/557) Vill04 = 2004A&A...419..149V (Cat. J/A+A/419/149; <Cl* NGC 6996 VBC NNNN> in Simbad) Welin73 = 1973A&AS....9..183W Zdan90 = 1990Ap&SS.173..309Z
Byte-by-byte Description of file: table4.dat
Bytes Format Units Label Explanations
1- 18 A18 --- [RGS2011] Source name ( 20- 27 A8 --- Clu Cluster Name (1) 29 A1 --- Q [ABC] YSO quality (A for good confidence) 31- 34 A4 --- cl YSO class (2) 36- 38 A3 --- cr1 [yes/no] Selected from [3.6] vs [3.6]-[24] CMD (3) 40- 42 A3 --- cr2 [yes/no] Not too faint in [3.6] vs [3.6]-[24] CMD (3) 44- 46 A3 --- cr3 [yes/no] Selected from Ks vs Ks-[24] CMD (3) 48- 50 A3 --- cr4 [yes/no] Detected at 70 microns (3) 52- 54 A3 --- cr5 [yes/no] Found in Guieu et al. 2009 Cat. J/ApJ/697/787 ([GRS2009] in Simbad) 56- 58 A3 --- cr6 [yes/no] Close to the middle of the nebula (3) 60- 62 A3 --- cr7 [yes/no] In a cluster (3) 64- 66 A3 --- cr8 [yes/no] Previously identified YSO (3) 68- 70 A3 --- cr9 [yes/no] Selected from Ic vs. V-Ic CMD (3) 72- 74 A3 --- cr10 [yes/no] Selected from IPHAS r' vs. r'-i' CMD (3) 76- 78 A3 --- cr11 [yes/no] A bright IPHAS Hα source (3) 80- 82 A3 --- cr12 [yes/no] Selected from IPHAS r'-Hα vs r'-i' diagram (3)
Note (1): Clusters as follows: Pelican = IC 5070. See section 6.3 for further details. PelHat = Pelican's Hat. North of the Pelican's head, in roughly the same location as would be found a hat on its head, is a previously unidentified dark lane at 24um, similar to but much smaller than the Gulf of Mexico. See section 6.4 for further details. Gulf = The "Gulf of Mexico" region is the area of highest extinction in the NAN (The North American (NGC 7000) and Pelican (IC 5070) Nebulae) complex. See section 6.2 for further details. Note (2): In the spirit of Wilking et al. (2001ApJ...551..357W), we define the near- to mid-IR slope of the SED, α=dlogλFλ/dlogλ, where α>0.3 for a Class I, 0.3 to -0.3 for a flat-spectrum source, -0.3 to -1.6 for a Class II, and ←1.6 for a Class III. Note (3): For each individual criterion, a "yes" means the object met that given criterion for YSO selection, "no" means it did not, and blank means that it was unable to be assessed for that criterion. For example, column S3624 indicates whether each object was selected as a YSO candidate in the [3.6] vs. [3.6]-[24] diagram ("yes"), or it was not ("no"), or, it was missing a 3.6 or 24 micron measurement, and thus could not be assessed in the [3.6] vs. [3.6]-[24] diagram (blank). See section 4.2 for further details on each criterion.
History: From electronic version of the journal References: Guieu et al. Paper I. 2009ApJ...697..787G Cat. J/ApJ/697/787
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 11-May-2011
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