Access to Astronomical Catalogues

← Click to display the menu
J/AJ/135/2496       Near-IR survey of Class I protostars     (Connelley+, 2008)

The evolution of the multiplicity of embedded protostars. I. Sample properties and binary detections. Connelley M.S., Reipurth B., Tokunaga A.T. <Astron. J., 135, 2496-2525 (2008)> =2008AJ....135.2496C
ADC_Keywords: Stars, double and multiple ; YSOs ; Photometry, infrared Keywords: binaries: general - infrared: stars - stars: formation - stars: statistics Abstract: We present the observational results of a near-infrared survey of a large sample of Class I protostars designed to determine the Class I binary separation distribution from ∼100AU to ∼5000AU. We have selected targets from a new sample of 267 nearby candidate Class I objects. This sample is well understood, consists of mostly Class I young stellar objects (YSOs) within 1kpc, has targets selected from the whole sky, and is not biased by previous studies of star formation. Description: We used the UH 2.2m telescope with QUIRC (1024 HgCdTe 1-2.5um 3' field of view (FOV)), the NASA IRTF with the SpeX guider (512 InSb 1-5um 1' FOV) and NSFCam2 (2048 Hawaii-2RG 1-5.5um 82" FOV), UKIRT with UIST (1024 InSb 1-5um 1' FOV), and Subaru Telescope with CIAO (10242 InSb 1-5um 22" FOV) and IRCS (1024 InSb 1-5um 1' FOV). File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 128 242 Source characteristics table4.dat 91 483 Target photometry table5.dat 78 89 Binary properties table6.dat 73 189 Binary detection limits refs.dat 124 53 References
See also: VII/233 : The 2MASS Extended sources, 2MASX (IPAC/UMass, 2003-2006) Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 13 A13 --- IRAS IRAS identification 15- 57 A43 --- Assoc Association(s) (1) 59- 63 I5 pc Dist ? Estimated heliocentric distance 65- 66 I2 --- r_Dist Reference for Dist, in refs.dat file 68- 75 F8.1 solLum Lbol ? Bolometric luminosity 77- 78 I2 h RAh 2MASS Hour of Right Ascension (J2000) 80- 81 I2 min RAm 2MASS Minute of Right Ascension (J2000) 83- 87 F5.2 s RAs 2MASS Second of Right Ascension (J2000) 89 A1 --- pf [I*] Position flag (2) 91 A1 --- DE- Sign of the the 2MASS Declination (J2000) 92- 93 I2 deg DEd 2MASS Degree of Declination (J2000) 95- 96 I2 arcmin DEm 2MASS Arcminute of Declination (J2000) 98-101 F4.1 arcsec DEs 2MASS Arcsecond of Declination (J2000) 103-108 F6.3 mag Jmag ? 2MASX J band magnitude 110-115 F6.3 mag Hmag ? 2MASX H band magnitude 117-122 F6.3 mag Kmag ? 2MASX Ks band magnitude 124-128 F5.2 --- alpha ? Lada (1991) source spectral index (3)
Note (1): RNO designates objects in "Red and Nebulous Objects in Dark Clouds: a Survey". (Cohen, 1980AJ.....85...29C). Note (2): Position flag as follows: I = A near-IR counterpart could not be identified in the 2MASS images so the coordinates are from IRAS * = Not explicited in the paper Note (3): Lada, 1991, The Physics of Star Formation and Early Stellar Evolution, ed. C. J. Lada & N. D. Kylafis (Dordrecht: Kluwer), 329
Byte-by-byte Description of file: table4.dat
Bytes Format Units Label Explanations
1- 13 A13 --- IRAS IRAS identification 15- 16 A2 --- m_IRAS Identifier number in L' source finder chart 18 A1 --- f_Hmag Limit or approximate flag on Hmag 19- 24 F6.3 mag Hmag ? The H band magnitude 25 A1 --- n_Hmag [*] confused Hmag (1) 27- 30 F4.2 mag e_Hmag ? Uncertainty in Hmag; see Section 3.5 32- 41 A10 "D/M/Y" HObs Date of the H band observation 42 A1 --- n_HObs [2]? 2 if 2MASS observation 43 A1 --- f_Kmag Limit flag on Kmag 44- 49 F6.3 mag Kmag ? The K band magnitude 50 A1 --- n_Kmag [*] confused Kmag (1) 52- 55 F4.2 mag e_Kmag ? Uncertainty in Kmag; see Section 3.5 57- 66 A10 "D/M/Y" KObs Date Day of the K band observation 67 A1 --- n_KObs [2]? 2 if 2MASS observation 69- 74 F6.3 mag Lmag ? The L band magnitude 75 A1 --- n_Lmag [*] confused Lmag (1) 77- 80 F4.2 mag e_Lmag ? Uncertainty in Lmag; see Section 3.5 82- 91 A10 "D/M/Y" LObs Date Day of the L' band observation
Note (1): * indicates that the photometry includes flux from this source and an adjacent source, which were not resolved in this wavelength
Byte-by-byte Description of file: table5.dat
Bytes Format Units Label Explanations
1- 13 A13 --- IRAS IRAS identification 15- 16 I2 --- m_IRAS ? Primary star number in finding chart (1) 18- 21 I4 pc Dist ?=- Estimated heliocentric distance 23- 26 F4.2 mag DelL L' magnitude difference (2) 28- 32 F5.2 arcsec Sep Angular separation (2) 34- 38 F5.1 deg PA Position angle of secondary star 40- 78 A39 --- Disc Discoverer
Note (1): If there is more than one primary object per IRAS source. Note (2): Between primary and secondary stars.
Byte-by-byte Description of file: table6.dat
Bytes Format Units Label Explanations
1- 13 A13 --- IRAS IRAS identification 15- 16 I2 --- m_IRAS ? Primary star number in finding chart (1) 18- 21 I4 pc Dist ? Estimated heliocentric distance (2) 23- 28 F6.2 arcsec inL1 ? DeltaL'=1mag inner detection limit (3) 30- 35 F6.2 arcsec inL2 ? DeltaL'=2mag inner detection limit (3) 37- 42 F6.2 arcsec inL3 ? DeltaL'=3mag inner detection limit (3) 44- 49 F6.2 arcsec inL4 ? DeltaL'=4mag inner detection limit (3) 51- 55 F5.2 arcsec outL1 DeltaL'=1mag outer detection limit (4) 57- 61 F5.2 arcsec outL2 DeltaL'=2mag outer detection limit (4) 63- 67 F5.2 arcsec outL3 DeltaL'=3mag outer detection limit (4) 69- 73 F5.2 arcsec outL4 DeltaL'=4mag outer detection limit (4)
Note (1): If there is more than one primary object per IRAS source. Note (2): A blank indicates that a distance estimate was searched for but one couldn't be found. Note (3): The closest distance from the primary star that a fake companion star of the stated magnitude difference could be detected. If inner detection limit is 999., then a companion of that contrast cannot be detected at any separation. Note (4): The farthest that a binary companion could be accepted. This is limited by our 5000AU separation limit or the 5% contamination criterion.
Byte-by-byte Description of file: refs.dat
Bytes Format Units Label Explanations
1- 2 I2 --- Ref Reference code 4- 22 A19 --- BibCode BibCode 24- 52 A29 --- Aut Author's name 54-124 A71 --- Com Comments
History: From electronic version of the journal
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 14-Jan-2011
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

catalogue service

© UDS/CNRS

Contact