J/A+A/504/461 YSOs in L1630N and L1641 (Fang+, 2009)
Star and protoplanetary disk properties in Orion's suburbs.
Fang M., Van Boekel R., Wang W., Carmona A., Sicilia-Aguilar A.,
Henning Th.
<Astron. Astrophys., 504, 461-489 (2009)>
=2009A&A...504..461F 2009A&A...504..461F
ADC_Keywords: Molecular clouds ; Stars, pre-main sequence ; YSOs ;
Photometry, infrared ; Equivalent widths
Keywords: surveys - stars: pre-main sequence -
planetary systems: protoplanetary disks - accretion, accretion disks
Abstract:
Knowledge of the evolution of circumstellar accretion disks is pivotal
to our understanding of star and planet formation; and yet despite
intensive theoretical and observational studies, the disk dissipation
process is not well understood. Infrared observations of large numbers
of young stars, as performed by the Spitzer Space Telescope, may
advance our knowledge of this inherently complex process. While
infrared data reveal the evolutionary status of the disk, they hold
little information on the properties of the central star and the
accretion characteristics.
Existing 2MASS and Spitzer archive data of the Lynds 1630N and 1641
clouds in the Orion GMC provide disk properties of a large number of
young stars. We wish to complement these data with optical data that
provide the physical stellar parameters and accretion characteristics.
Description:
We performed a large optical spectroscopic and photometric survey of
the aforementioned clouds. Spectral types, as well as accretion and
outflow characteristics, are derived from our VLT/VIMOS spectra.
Optical SDSS and CAHA/LAICA imaging was combined with 2MASS, Spitzer
IRAC, and MIPS imaging to obtain spectral energy distributions from
0.4 to 24um. Reddened model atmospheres were fitted to the optical/NIR
photometric data, keeping Teff fixed at the spectroscopic value.
Mass and age estimates of individual objects were made through
placement in the HR diagram and comparison to several sets of pre-main
sequence evolutionary tracks.
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* *
* Sorry, but the author(s) never supplied the tabular material *
* (tables 8-9, 12-15) as announced in the paper *
* *
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table4.dat 181 132 Parameters for YSOs in L1630N
table5.dat 181 267 Parameters for YSOs in L1641
table6.dat 169 132 Photometric magnitudes of YSOs in L1630N
table7.dat 169 267 Photometric magnitudes of YSOs in L1641
table10.dat 152 38 Equivalent widths of emission lines on the
optical spectra for YSOs in L1630N
table11.dat 152 70 Equivalent widths of emission lines on the
optical spectra for YSOs in L1641
table16.dat 169 47 Photometric magnitudes for transition disk
object candidates
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See also:
J/A+A/489/1409 : Infrared photometry and spectroscopy in L1641N (Galfalk+ 2008)
Byte-by-byte Description of file:table[45].dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 3 I3 --- Seq Sequential number
5- 6 I2 h RAh Right ascension (J2000)
8- 9 I2 min RAm Right ascension (J2000)
11- 15 F5.2 s RAs Right ascension (J2000)
17 A1 --- DE- Declination sign (J2000)
18- 19 I2 deg DEd Declination (J2000)
21- 22 I2 arcmin DEm Declination (J2000)
24- 27 F4.1 arcsec DEs Declination (J2000)
29- 32 A4 --- SpT1 Litterature spectral type
33 A1 --- r_SpT1 [abcd] Reference for SpType1 (1)
35- 38 A4 --- SpT2 Litterature spectral type
39 A1 --- r_SpT2 [abcd] Reference for SpType2 (1)
41- 44 A4 --- SpT3 Litterature spectral type
45 A1 --- r_SpT3 [abc] Reference for SpType3 (1)
47- 50 A4 --- SpT Adopted spectral type
52- 57 F6.3 solLum Lbol Bolometric luminosity (2)
59- 64 F6.1 0.1nm EWHa ?=- Hα equivalent width
65 A1 --- r_EWHa [abcd] Reference for EWHa (1)
67- 72 F6.1 0.1nm EWHa2 ? Hα equivalent width
73 A1 --- r_EWHa2 [abcd] Reference for EWHa2 (1)
75- 79 F5.1 0.1nm EWHa3 ? Hα equivalent width
80 A1 --- r_EWHa3 [c] Reference for EWHa3 (1)
82- 84 F3.1 0.1nm EWLi ?=- Lithium equivalent width
85 A1 --- r_EWLi [abc] Reference for EWLi (1)
87- 89 F3.1 0.1nm EWLi2 ? Lithium equivalent width
90 A1 --- r_EWLi2 [abc] Reference for EWLi2 (1)
92- 95 A4 --- Type TTS classification (Weak or Classical TTau)
based on the criteria in Appendix A
97-100 F4.1 mag AV Absorption in V band
102-104 A3 --- Pop [yes no] aggregate/cluster population (yes)
or distributed population (no)
106-110 F5.2 --- alpha ?=- Spectral index α(3.6-8.0um)
112-115 F4.2 solMass Mass ?=- Stellar mass (3)
117-120 F4.2 solMass E_Mass ? Error on Mass (upper limit)
122-125 F4.2 solMass e_Mass ? Error on Mass (lower limit)
127-132 F6.2 Myr Age ?=- Stellar age (3)
134-138 F5.2 Myr E_Age ? Error on Age (upper limit)
140-144 F5.2 Myr e_Age ? Error on Age (lower limit)
146-160 A15 --- Disk Disk properties
162-167 F6.2 [solMass/yr] accRate1 ?=- Accretion rate log(dMacc/dt) estimated
with Hα emission line luminosity
169-174 F6.2 [solMass/yr] accRate2 ?=- Accretion rate log(dMacc/dt) estimated
with Hβ emission line luminosity
176-181 F6.2 [solMass/yr] accRate3 ?=- Accretion rate log(dMacc/dt) estimated
with HeI(5876Å) emission line luminosity
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Note (1): References as follows:
a = values estimated from our VIMOS spectra
b = values from Flaherty & Muzerolle (2008AJ....135..966F 2008AJ....135..966F)
c = values from Galfalk & Olofsson (2008, Cat. J/A+A/489/1409)
d = values from Allen (1995, Ph.D. Thesis, Department of Physics
and Astronomy, University of Massachusetts, Amherst)
Note (2): Stellar bolometric luminosity derived from optical SED fitting
(see Sect. 3.3.2).
Note (3): using PMS evolutionary tracks from Dotter et al.
(2008ApJS..178...89D 2008ApJS..178...89D)
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Byte-by-byte Description of file: table[67].dat table16.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 3 I3 --- Seq Sequential number
5- 6 I2 h RAh Right ascension (J2000)
8- 9 I2 min RAm Right ascension (J2000)
11- 15 F5.2 s RAs Right ascension (J2000)
17 A1 --- DE- Declination sign (J2000)
18- 19 I2 deg DEd Declination (J2000)
21- 22 I2 arcmin DEm Declination (J2000)
24- 27 F4.1 arcsec DEs Declination (J2000)
29- 33 F5.2 mag u'mag ?=- SDSS u' magnitude
35- 38 F4.2 mag e_u'mag ? rms uncertainty on u'mag
40- 44 F5.2 mag g'mag ?=- SDSS g' magnitude
46- 49 F4.2 mag e_g'mag ? rms uncertainty on g'mag
51- 55 F5.2 mag r'mag ?=- SDSS r' magnitude
57- 60 F4.2 mag e_r'mag ? rms uncertainty on r'mag
62- 66 F5.2 mag i'mag ?=- SDSS i' magnitude
68- 71 F4.2 mag e_i'mag ? rms uncertainty on i'mag
73- 77 F5.2 mag z'mag ?=- SDSS z' magnitude
79- 82 F4.2 mag e_z'mag ? rms uncertainty on z'mag
84- 88 F5.2 mag Jmag ?=0.01 2MASS J magnitude
90- 93 F4.2 mag e_Jmag ?=0.01 rms uncertainty on Jmag
95- 99 F5.2 mag Hmag ?=0.01 2MASS H magnitude
101-104 F4.2 mag e_Hmag ?=0.01 rms uncertainty on Hmag
106-110 F5.2 mag Ksmag ?=0.01 2MASS Ks magnitude
112-115 F4.2 mag e_Ksmag ?=0.01 rms uncertainty on Ksmag
117-121 F5.2 mag 3.6mag ?=- IRAC 3.6um magnitude
123-126 F4.2 mag e_3.6mag ? rms uncertainty on 3.6mag
128-132 F5.2 mag 4.5mag ?=- IRAC 4.5um magnitude
134-137 F4.2 mag e_4.5mag ? rms uncertainty on 4.5mag
139-143 F5.2 mag 5.8mag ?=- IRAC 5.8um magnitude
145-148 F4.2 mag e_5.8mag ? rms uncertainty on 5.8mag
150-154 F5.2 mag 8.0mag ?=- IRAC 8.0um magnitude
156-159 F4.2 mag e_8.0mag ? rms uncertainty on 8.0mag
161-164 F4.2 mag 24mag ?=- MIPS 24um magnitude
166-169 F4.2 mag e_24mag ? rms uncertainty on 24mag
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Byte-by-byte Description of file: table1[01].dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 3 I3 --- Seq Sequential number
5- 6 I2 h RAh Right ascension (J2000)
8- 9 I2 min RAm Right ascension (J2000)
11- 15 F5.2 s RAs Right ascension (J2000)
17 A1 --- DE- Declination sign (J2000)
18- 19 I2 deg DEd Declination (J2000)
21- 22 I2 arcmin DEm Declination (J2000)
24- 27 F4.1 arcsec DEs Declination (J2000)
29- 34 F6.1 0.1nm EW([OI]1) ?=- [OI] (5577Å) equivalent width
36- 40 F5.2 0.1nm e_EW([OI]1) ? rms uncertainty on EW([OI])
42- 47 F6.1 0.1nm EW([OI]2) ?=- [OI] (6300Å) equivalent width
49- 53 F5.2 0.1nm e_EW([OI]2) ? rms uncertainty on EW([OI])
55- 60 F6.1 0.1nm EW([OI]3) ?=- [OI] (3663Å) equivalent width
62- 66 F5.2 0.1nm e_EW([OI]3) ? rms uncertainty on EW([OI])
68- 71 F4.1 0.1nm EW([NII]1) ?=- [NII] (6548Å) equivalent width
73- 76 F4.2 0.1nm e_EW([NII]1) ? rms uncertainty on EW([NII])
78- 82 F5.1 0.1nm EW([NII]2) ?=- [NII] (6583Å) equivalent width
84- 87 F4.2 0.1nm e_EW([NII]2) ? rms uncertainty on EW([NII])
89- 92 F4.1 0.1nm EW([HeI]) ?=- [HeI] (6678Å) equivalent width
94- 97 F4.2 0.1nm e_EW([HeI]) ? rms uncertainty on EW([HeI])
99-103 F5.1 0.1nm EW([SII]1) ?=- [SII] (6716Å) equivalent width
105-108 F4.2 0.1nm e_EW([SII]1) ? rms uncertainty on EW([SII])
110-114 F5.1 0.1nm EW([SII]2) ?=- [SII] (6731Å) equivalent width
116-119 F4.2 0.1nm e_EW([SII]2) ? rms uncertainty on EW([SII])
121-125 F5.1 0.1nm EW([CaII]1) ?=- [CaII] (8498Å) equivalent width
127-130 F4.2 0.1nm e_EW([CaII]1) ? rms uncertainty on EW([CaII])
132-136 F5.1 0.1nm EW([CaII]2) ?=- [CaII] (8542Å) equivalent width
138-141 F4.2 0.1nm e_EW([CaII]2) ? rms uncertainty on EW([CaII])
143-147 F5.1 0.1nm EW([CaII]3) ?=- [CaII] (8662Å) equivalent width
149-152 F4.2 0.1nm e_EW([CaII]3) ? rms uncertainty on EW([CaII])
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 05-Jan-2010