J/ApJS/219/21 Deep NIR survey toward Aquila. I. MHOs (Zhang+, 2015)
A deep near-infrared survey toward the Aquila molecular cloud.
I. Molecular hydrogen outflows.
Zhang M., Fang M., Wang H., Sun J., Wang M., Jiang Z., Anathipindika S.
<Astrophys. J. Suppl. Ser., 219, 21 (2015)>
=2015ApJS..219...21Z 2015ApJS..219...21Z (SIMBAD/NED BibCode)
ADC_Keywords: Interstellar medium ; YSOs ; Infrared sources ; Surveys
Keywords: infrared: ISM; ISM: jets and outflows; shock waves; stars: formation;
stars: winds, outflows
Abstract:
We have performed an unbiased, deep near-infrared survey toward the
Aquila molecular cloud with a sky coverage of ∼1deg2. We identified
45 molecular hydrogen emission-line objects (MHOs), of which only 11
were previously known. Using the Spitzer archival data, we also
identified 802 young stellar objects (YSOs) in this region. Based on
the morphology and the location of MHOs and YSO candidates, we
associate 43 MHOs with 40 YSO candidates. The distribution of jet
length shows an exponential decrease in the number of outflows with
increasing length, and the molecular hydrogen outflows seem to be
oriented randomly. Moreover, there is no obvious correlation between
jet lengths, jet opening angles, or jet H2 1-0 S(1) luminosities and
the spectral indices of the possible driving sources in this region.
We also suggest that molecular hydrogen outflows in the Aquila
molecular cloud are rather weak sources of turbulence, unlikely to
generate the observed velocity dispersion in the region of survey.
Description:
The observations were conducted in queue-scheduled observing mode
between 2012 July 26 and 29 with WIRCam on the Canada-France-Hawaii
Telescope (CFHT), covering in total an area of ∼1deg2. We observed
10 fields toward the Aquila molecular cloud in the J, H, Ks, and H2
(2.122um) bands.
As part of the Gould Belt Legacy program (PID: 30574), the Spitzer
Space Telescope observations toward the Serpens-Aquila rift were
conducted in 2007 May and September with the IRAC and MIPS cameras.
The Herschel archival data used in this paper are part of the Herschel
Gould Belt guaranteed time key programs for the study of star
formation with the PACS and SPIRE instruments and have been published
in Andre et al. (2010A&A...518L.102A 2010A&A...518L.102A), Konyves et al.
(2010A&A...518L.106K 2010A&A...518L.106K), and Bontemps et al. (2010A&A...518L..85B 2010A&A...518L..85B).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 103 40 Molecular hydrogen outflows identified in Aquila
table2.dat 53 108 Molecular hydrogen emission-line object (MHO)
features in Aquila
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See also:
J/A+A/584/A91 : Catalog of dense cores in Aquila from Herschel (Konyves+, 2015)
J/ApJ/802/59 : A search for YSO candidates in IRDC G53.2 (Kim+, 2015)
J/ApJ/779/113 : IR photometry of YSOs in the W40 region (Mallick+, 2013)
J/ApJS/207/5 : YSOs in LDN 1641 with Hectochelle spectra (Fang+, 2013)
J/MNRAS/421/3257 : MHO catalogue for Serpens and Aquila (Ioannidis+, 2012)
J/PASJ/63/S1 : Atlas & catalog of dark clouds based on 2MASS (Dobashi+, 2011)
J/AJ/140/1214 : Near-IR spectroscopic survey of class I YSOs (Connelley+, 2010)
J/A+A/511/A24 : MHO Catalogue (Davis+, 2010)
J/ApJS/184/18 : Spitzer survey of young stellar clusters (Gutermuth+, 2009)
J/A+A/496/153 : Molecular hydrogen flows along Ori A cloud (Davis+, 2009)
J/AJ/136/2391 : GLIMPSE Extended Green Objects catalog (Cyganowski+, 2008)
J/MNRAS/387/954 : H2 imaging of NGC 1333, L1455, L1448 and B1 (Davis+, 2008)
J/ApJ/674/336 : Spitzer observations of NGC 1333 (Gutermuth+, 2008)
J/AJ/133/1528 : IR nebulae around young stellar objects (Connelley+, 2007)
J/A+A/426/503 : Catalog of high velocity molecular outflows (Update) (Wu+ 2004)
J/A+A/426/171 : H2 flows in rho Ophiuchi A (Khanzadyan+, 2004)
J/A+A/392/239 : IR survey of outflows in Orion A (Stanke+, 2002)
http://www.herschel.fr/cea/gouldbelt/en/ : Gouls Belt survey Web page
http://astro.kent.ac.uk/~df/MHCat/ : Catalog of MHOs in outflows
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- Seq [1/40] Outflow number
4 A1 --- f_Seq [i] Flag on Seq (1)
6- 7 I2 h RAh [18] Hour of right ascension (J2000)
9- 10 I2 min RAm [28/32] Minute of right ascension (J2000)
12- 15 F4.1 s RAs Second of right ascension (J2000)
17 A1 --- DE- [-] Sign of declination (J2000)
18- 19 I2 deg DEd [1/2] Degree of declination (J2000)
21- 22 I2 arcmin DEm Arcminute of declination (J2000)
24- 25 I2 arcsec DEs Arcsecond of declination (J2000)
27- 30 F4.1 --- alpha [-2.4/2]? The apparent spectral
index of the outflow source
32- 35 F4.1 --- alpha0 [-2.5/1.9]? The dereddened spectral index of
the outflow source
37- 40 F4.1 mag Av [0.6/37.2] The visual extinction value that
are used for dereddening
42- 67 A26 --- MHO Associated MHO(s)
69- 72 F4.2 pc Length [0.01/1.7] Jet length
74- 76 I3 deg theta [1/149] Jet opening angle
78- 80 I3 deg PA [10/335] Jet position angle
82- 87 F6.2 10-5Lsun LH2 [0.3/258] H2 1-0 S(1) line luminosity of
the outflow
89- 94 F6.2 10-5Lsun e_LH2 [0.1/101] LH2 uncertainty
96-103 A8 --- Type Outflow type ("unipolar" or "bipolar")
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Note (1):
i = The parameters of these outflows have large uncertainties because of
the overlaps or interactions between these outflows and other ambient
outflows.
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 6 A6 --- MHO MHO feature designation
8- 9 I2 h RAh [18] Hour of right ascension (J2000) (1)
11- 12 I2 min RAm [28/32] Minute of right ascension (J2000)
14- 17 F4.1 s RAs Second of right ascension (J2000)
19 A1 --- DE- [-] Sign of declination (J2000) (1)
20- 21 I2 deg DEd [1/2] Degree of declination (J2000) (1)
23- 24 I2 arcmin DEm Arcminute of declination (J2000)
26- 27 I2 arcsec DEs Arcsecond of declination (J2000)
29- 34 F6.1 arcsec2 Area [4.9/2817] Area of the polygon
36- 39 F4.1 arcsec Rad [1.2/30] Equivalent circular radius
of the polygon
41- 46 F6.2 10-18W/m2 FH2 [0.6/808] H2 1-0 S(1) flux
48- 53 F6.2 10-18W/m2 e_FH2 [0.1/117] FH2 flux
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Note (1): Center of the polygon that is identified based on the morphology and
surface brightness distribution of each MHO feature.
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History:
From electronic version of the journal
(End) Emmanuelle Perret [CDS] 15-Dec-2015