J/A+A/440/151 Observations at 850um in Perseus clusters (Hatchell+, 2005)
Star formation in Perseus. Clusters, filaments and the conditions for star formation. Hatchell J., Richer J.S., Fuller G.A., Qualtrough C.J., Ladd E.F., Chandler C.J. <Astron. Astrophys., 440, 151-161 (2005)> =2005A&A...440..151H (SIMBAD/NED BibCode)
ADC_Keywords: Molecular clouds ; Spectra, millimetric/submm Keywords: stars: formation - submillimeter - dust, extinction - ISM: molecules - ISM: clouds - ISM: structure Abstract: We present a complete survey of current star formation in the Perseus molecular cloud, made at 850 and 450µ with SCUBA at the JCMT. Covering 3deg2, this submillimetre continuum survey for protostellar activity is second in size only to that of rho Ophiuchus (Johnstone et al., 2004ApJ...611L..45J). Complete above 0.4M☉ (5σ detection in a 14" beam), we detect a total of 91 protostars and pre-stellar cores. Of these, 80% lie in clusters, representative of star formation across the Galaxy. Two of the groups of cores are associated with the young stellar clusters IC 348 and NGC 1333, and are consistent with a steady or reduced star formation rate in the last 0.5Myr, but not an increasing one. In Perseus, 40-60% of cores are in small clusters (<50M☉) and isolated objects, much more than the 10% suggested from infrared studies. Complementing the dust continuum, we present a C18O map of the whole cloud at 1' resolution. Description: Images of Perseus were obtained at 850 and 450µm using SCUBA on the JCMT during 20 nights between 1999 and 2003. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file tablea1.dat 73 91 SCUBA 850µm core positions, names and references, peak 850µm fluxes and C18O integrated intensity at the submm peak position refs.dat 130 18 References
See also: J/A+A/359/113 : X-ray and IR study of Rho Oph dark cloud (Grosso+, 2000) J/PASJ/55/653 : Chandra X-ray flares in rho Ophiuchi (Imanishi+, 2003) J/A+A/429/963 : XMM-Newton observation of the rho Oph cloud (Ozawa+, 2005) J/A+A/430/549 : C18O/C17O near rho Oph (Wouterloot+, 2005) J/ApJ/630/381 : Mid-IR imaging in ρ Oph (Barsony+, 2005) J/A+A/447/609 : mm continuum obs. in rho Oph cloud (Stanke+, 2006) Byte-by-byte Description of file: tablea1.dat
Bytes Format Units Label Explanations
1- 2 I2 --- [HRF2005] Sequential number 4- 5 I2 h RAh Right ascension (
J2000) 7- 8 I2 min RAm Right ascension ( J2000) 10- 13 F4.1 s RAs Right ascension ( J2000) 15 A1 --- DE- Declination sign ( J2000) 16- 17 I2 deg DEd Declination ( J2000) 19- 20 I2 arcmin DEm Declination ( J2000) 22- 23 I2 arcsec DEs Declination ( J2000) 25- 32 A8 --- Cluster Cluster name (1) 34 A1 --- n_Cluster [ab] a = B5 pair, b = B1 west pair 36- 57 A22 --- Name Names from previous detections 59- 63 A5 --- r_Name Reference for previous detections (3) 65- 68 I4 mJy F850um SCUBA 850µm peak flux (14" beam), in mJy/beam 70- 72 F3.1 K.km/s I(C18O) ? C18O integrated intensity (1' beam averaged) at the 850um peak 73 A1 --- u_I(C18O) [?] SCUBA peak which lies outside the C18O map.
Note (1): If the core satisfies the cluster membership criterion (Sect. 3) then the cluster name is given here. Note (3): References are to the earliest previous detection of the submillimetre source. Full cross-identifications with sources at other wavelengths are non-trivial due to differing beam sizes and are left for a future analysis, but to indicate an obvious likely counterpart (e.g., IRAS), "No SMM/MM source" is marked in the "Name" column instead of "None".
Byte-by-byte Description of file: refs.dat
Bytes Format Units Label Explanations
1- 2 I2 --- Ref Reference number 4- 22 A19 --- BibCode BibCode 24- 41 A18 --- Aut Author's name 44-130 A87 --- Com Comments
History: From electronic version of the journal
(End) Patricia Vannier [CDS] 27-Jul-2006
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