J/MNRAS/421/78 LMC pre-main sequences stars mass accretion rates (Spezzi+, 2012)
Photometric determination of the mass accretion rates of pre-mainsequence stars.
III. Results in the Large Magellanic Cloud.
Spezzi L., De Marchi G., Panagia N., Sicilia-Aguilar A., Ercolano B.
<Mon. Not. R. Astron. Soc., 421, 78-97 (2012)>
=2012MNRAS.421...78S 2012MNRAS.421...78S
ADC_Keywords: Magellanic Clouds ; Stars, pre-main sequence ; Photometry, HST ;
Accretion
Keywords: stars: formation - stars: pre-main-sequence - Magellanic Clouds
Abstract:
We present a multiwavelength study of three star-forming regions,
spanning the age range 1-14Myr, located between the 30 Doradus
complex and supernova SN 1987A in the Large Magellanic Cloud (LMC). We
reliably identify about 1000 pre-main-sequence (PMS) star candidates
actively undergoing mass accretion and estimate their stellar
properties and mass accretion rate (dM/dt). Our measurements
represent the largest dM/dt data set of low-metallicity stars
presented so far. As such, they offer a unique opportunity to study on
a statistical basis the mass accretion process in the LMC and, more in
general, the evolution of the mass accretion process around
low-metallicity stars.
Description:
The observations were performed from 1999 February to 2003 November
with the Wide Field Planetary Camera 2 (WFPC2) of the HST using the
F606W (V), F656N (Hα) and F814W (I) filters.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 74 1057 Astrometry and observed photometry of the PMS star
candidates in the LMC
table3.dat 57 1057 Stellar parameters, Hα equivalent width and
accretion rate of PMS star candidates in the LMC
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See also:
J/ApJ/707/1417 : HST view of YSOs in the LMC (Vaidya+, 2009)
J/ApJS/184/172 : High- and intermediate-mass YSOs in the LMC (Gruendl+, 2009)
J/A+A/542/A66 : YSOs in 9 LMC star forming regions (Carlson+, 2012)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1 I1 --- Fld [1/3] Field number
2 A1 --- --- [-]
3- 6 A4 --- --- [Pop.]
7 I1 --- Pop [1/2]? Population for Field 3
9- 11 I3 --- Seq Sequential number within the field,
[SDP2012] F NNN in Simbad
13 I1 h RAh Right ascension (J2000)
15- 16 I2 min RAm Right ascension (J2000)
18- 22 F5.2 s RAs Right ascension (J2000)
24 A1 --- DE- Declination sign (J2000)
25- 26 I2 deg DEd Declination (J2000)
28- 29 I2 arcmin DEm Declination (J2000)
31- 35 F5.2 arcsec DEs Declination (J2000)
37- 42 F6.3 mag F606W F606W magnitude
44- 48 F5.3 mag e_F606W rms uncertainty on F606W
50- 55 F6.3 mag F656N F656N magnitude
57- 61 F5.3 mag e_F656N rms uncertainty on F656N
63- 68 F6.3 mag F814W F814W magnitude
70- 74 F5.3 mag e_F814W rms uncertainty on F814W
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Byte-by-byte Description of file: table3.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1 I1 --- Fld [1/3] Field number
2 A1 --- --- [-]
3- 6 A4 --- --- [Pop.]
7 I1 --- Pop [1/2]? Population for Field 3
9- 11 I3 --- Seq Sequential number within the field,
[SDP2012] F NNN in Simbad
13- 16 F4.2 [K] logTe Effective temperature
18- 21 F4.2 [K] e_logTe rms uncertainty on Teff
23- 26 F4.2 [Lsun] logL ?=- Star luminosity
28- 31 F4.2 [Lsun] e_logL rms uncertainty on logL
33- 35 F3.1 Msun Mass Mass
37- 40 F4.1 Myr Age rms uncertainty on Age
42- 45 I4 0.1nm EWHa Hα equivalent width
47- 48 I2 0.1nm e_EWHa rms uncertainty on EWHa
50- 53 F4.1 [Msun/yr] logMdot Accretion rate
55- 57 F3.1 [Msun/yr] e_logMdot rms uncertainty on logMdot
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History:
From electronic version of the journal
References:
de Marchi et al., Paper I 2010ApJ...715....1D 2010ApJ...715....1D
de Marchi et al., Paper II 2011ApJ...740...11D 2011ApJ...740...11D
(End) Patricia Vannier [CDS] 05-Oct-2012