J/A+A/581/A52 Gaia-ESO Survey: Hα emission stars catalogue (Traven+, 2015)
The Gaia-ESO Survey: Catalogue of Hα emission stars.
Traven G., Zwitter T., Van Eck S., Klutsch A., Bonito R., Lanzafame A.C.,
Alfaro E.J., Bayo A., Bragaglia A., Costado M.T., Damiani F., Flaccomio E.,
Frasca A., Hourihane A., Jimenez-Esteban F., Lardo C., Morbidelli L.,
Pancino E., Prisinzano L., Sacco G.G., Worley C.C.
<Astron. Astrophys. 581, A52 (2015)>
=2015A&A...581A..52T 2015A&A...581A..52T
ADC_Keywords: Stars, emission ; Stars, peculiar ; Spectroscopy
Keywords: stars: emission-line, Be - stars: peculiar -
open clusters and associations: general - line: profiles - catalogs -
stars: activity
Abstract:
We discuss the properties of Hα emission stars across the sample of
22035 spectra from the Gaia-ESO Survey internal data release, observed
with the GIRAFFE instrument and largely belonging to stars in young
open clusters. Automated fits using two independent Gaussian profiles
and a third component accounting for the nebular emission allow us to
discern distinct morphological types of Hα line profiles with the
introduction of a simplified classification scheme. Altogether we find
3765 stars with intrinsic emission and sort their spectra into eight
distinct morphological categories: single component emission, emission
blend, sharp emission peaks, double emission, P-Cygni, inverted
P-Cygni, self absorption, and emission in absorption. We have more
than one observation for 1430 stars in our sample, thus allowing a
quantitative discussion of the degree of variability of Hα emission
profiles, which is expected for young, active objects. We present a
catalogue of stars with properties of their Hα emission line
profiles, morphological classification, analysis of variability with
time and the supplementary information from SIMBAD, VizieR and ADS
databases. The records in SIMBAD indicate the presence of Hα emission
for roughly 25% of all stars in our catalogue while at least 305 of
them have already been more thoroughly investigated according to the
references in ADS. The most frequently identified morphological
categories in our sample of spectra are emission blend (23%), emission
in absorption (22%), and self absorption (16%). Objects with repeated
observations demonstrate that our classification into discrete
categories is generally stable through time while seemingly less
stable are categories P-Cygni and Self absorption, which is the
consequence of discrete classification rules as well as of the
fundamental change in profile shape. Such records of emission stars
can be valuable for automatic pipelines in large surveys, where it may
prove very useful to pinpoint outliers during calculation of general
stellar properties and elemental abundances. They can find use in
studies of star formation processes, interacting binaries and other
fields of stellar physics.
Description:
The GES employs the VLT-UT2 FLAMES high-resolution multiobject
spectrograph . FLAMES has two instruments, the higher-resolution UVES,
fed by 8 fibres, and GIRAFFE, with about 130 fibres. In the present
paper we concentrate on the much more numerous GIRAFFE spectra to
thoroughly test our classification scheme; a similar analysis of the
UVES spectra will follow later. We use only spectra obtained in the
wavelength range with Hα line - HR15N setting (6470-6790Å,
R=17000), for which the majority of targets selected by GES are open
cluster stars. Along with ongoing GES observations, we also use all
relevant ESO archive data, which are included to be analysed as part
of GES.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tabled1.dat 745 8846 Master table with the main results for each
analysed spectrum
tabled2.dat 701 4459 Cross-identifications to Simbad, Vizier and ADS
tabled3.dat 269 98 Reference list
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Byte-by-byte Description of file: tabled1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 23 A23 "datime" ObsDate Date and time of the observation
(YYYY-MM-DDThh:mm:ss.sss) (DATEOBS)
25- 40 A16 --- Cname Sexagesimal, equatorial position-based source
name (HHMMSSss+DDMMSSs) (CNAME)
42- 49 F8.4 deg RAdeg Right ascension (J2000)
51- 59 F9.5 deg DEdeg Declination (J2000)
61- 67 F7.2 0.1nm lam11 [6557/65667] Central wavelength λ1 of
first Gaussian fit, 1/5 (Halphalambda1) (2)
69- 75 F7.2 0.1nm lam12 [6557/65667] Central wavelength λ1 of
first Gaussian fit, 2/5 (Halphalambda1) (2)
77- 83 F7.2 0.1nm lam13 [6557/65667] Central wavelength λ1 of
first Gaussian fit, 3/5 (Halphalambda1) (2)
85- 91 F7.2 0.1nm lam14 [6557/65667] Central wavelength λ1 of
first Gaussian fit, 3/5 (Halphalambda1) (2)
93- 99 F7.2 0.1nm lam15 [6557/65667] Central wavelength λ1 of
first Gaussian fit, 4/5 (Halphalambda1) (2)
101-108 F8.6 0.1nm sig11 [0.15/2] Dispersion σ1 of first
Gaussian profile fit, 1/5 (Halphasigma1) (2)
110-117 F8.6 0.1nm sig12 [0.15/2] Dispersion σ1 of first
Gaussian profile fit, 2/5 (Halphasigma1) (2)
119-126 F8.6 0.1nm sig13 [0.15/2] Dispersion σ1 of first
Gaussian profile fit, 3/5 (Halphasigma1) (2)
128-135 F8.6 0.1nm sig14 [0.15/2] Dispersion σ1 of first
Gaussian profile fit, 4/5 (Halphasigma1) (2)
137-145 F9.7 0.1nm sig15 [0.15/2] Dispersion σ1 of first
Gaussian profile fit, 5/5 (Halphasigma1) (2)
146-159 F14.7 --- A11 Peak height A1 of the first Gaussian
profile fit, 1/5 (Halphapeak1) (2)
161-174 F14.7 --- A12 Peak height A1 of the first Gaussian
profile fit, 2/5 (Halphapeak1) (2)
176-189 F14.7 --- A13 Peak height A1 of the first Gaussian
profile fit, 3/5 (Halphapeak1) (2)
191-203 F13.7 --- A14 Peak height A1 of the first Gaussian
profile fit, 4/5 (Halphapeak1) (2)
205-217 F13.7 --- A15 Peak height A1 of the first Gaussian
profile fit, 5/5 (Halphapeak1) (2)
219-225 F7.2 0.1nm lam21 [6559/6569] Central wavelength λ2 of
second Gaussian fit, 1/5 (Halphalambda2) (2)
227-233 F7.2 0.1nm lam22 [6559/6569] Central wavelength λ2 of
second Gaussian fit, 2/5 (Halphalambda2) (2)
235-241 F7.2 0.1nm lam23 [6559/6569] Central wavelength λ2 of
second Gaussian fit, 3/5 (Halphalambda2) (2)
243-249 F7.2 0.1nm lam24 [6559/6569] Central wavelength λ2 of
second Gaussian fit, 4/5 (Halphalambda2) (2)
251-257 F7.2 0.1nm lam25 [6559/6569] Central wavelength λ2 of
second Gaussian fit, 5/5 (Halphalambda2) (2)
259-266 F8.6 0.1nm sig21 [0.15/2] Dispersion σ2 of second
Gaussian profile fit, 1/5 (Halphasigma2) (2)
268-275 F8.6 0.1nm sig22 [0.15/2] Dispersion σ2 of second
Gaussian profile fit, 2/5 (Halphasigma2) (2)
277-284 F8.6 0.1nm sig23 [0.15/2] Dispersion σ2 of second
Gaussian profile fit, 3/5 (Halphasigma2) (2)
286-293 F8.6 0.1nm sig24 [0.15/2] Dispersion σ2 of second
Gaussian profile fit, 4/5 (Halphasigma2) (2)
295-302 F8.6 0.1nm sig25 [0.15/2] Dispersion σ2 of second
Gaussian profile fit, 5/5 (Halphasigma2) (2)
304-316 F13.7 --- A21 Peak height A2 of the second Gaussian
profile fit, 1/5 (Halphapeak2) (2)
318-330 F13.7 --- A22 Peak height A2 of the second Gaussian
profile fit, 2/5 (Halphapeak2) (2)
332-344 F13.7 --- A23 Peak height A2 of the second Gaussian
profile fit, 3/5 (Halphapeak2) (2)
346-358 F13.7 --- A24 Peak height A2 of the second Gaussian
profile fit, 4/5 (Halphapeak2) (2)
360-373 F14.8 --- A25 Peak height A2 of the second Gaussian
profile fit, 5/5 (Halphapeak2) (2)
374-380 F7.2 0.1nm lam31 [6562/6564]?=0 Central wavelength λ3 of
third Gaussian fit, 1/5 (Halphalambdaneb) (2)
382-388 F7.2 0.1nm lam32 [6562/6564]?=0 Central wavelength λ3 of
third Gaussian fit, 2/5 (Halphalambdaneb) (2)
390-396 F7.2 0.1nm lam33 [6562/6564]?=0 Central wavelength λ3 of
third Gaussian fit, 3/5 (Halphalambdaneb) (2)
398-404 F7.2 0.1nm lam34 [6562/6564]?=0 Central wavelength λ3 of
third Gaussian fit, 4/5 (Halphalambdaneb) (2)
406-412 F7.2 0.1nm lam35 [6562/6564]?=0 Central wavelength λ3 of
third Gaussian fit, 5/5 (Halphalambdaneb) (2)
414-421 F8.6 0.1nm sig31 [0.26/0.45]?=0 Dispersion σ3 of third
Gaussian profile fit, 1/5 (Halphasigmaneb) (2)
423-430 F8.6 0.1nm sig32 [0.26/0.45]?=0 Dispersion σ3 of third
Gaussian profile fit, 2/5 (Halphasigmaneb) (2)
432-439 F8.6 0.1nm sig33 [0.26/0.45]?=0 Dispersion σ3 of third
Gaussian profile fit, 3/5 (Halphasigmaneb) (2)
441-448 F8.6 0.1nm sig34 [0.26/0.45]?=0 Dispersion σ3 of third
Gaussian profile fit, 4/5 (Halphasigmaneb) (2)
450-457 F8.6 0.1nm sig35 [0.26/0.45]?=0 Dispersion σ3 of third
Gaussian profile fit, 5/5 (Halphasigmaneb) (2)
459-482 F24.19 --- A31 ?=0 Peak height A3 of the third Gaussian
profile fit, 1/5 (Halphapeakneb) (2)
484-507 F24.19 --- A32 ?=0 Peak height A3 of the third Gaussian
profile fit, 2/5 (Halphapeakneb) (2)
509-532 F24.19 --- A33 ?=0 Peak height A3 of the third Gaussian
profile fit, 3/5 (Halphapeakneb) (2)
534-558 E25.20 --- A34 ?=0 Peak height A3 of the third Gaussian
profile fit, 4/5 (Halphapeakneb) (2)
560-583 F24.19 --- A35 ?=0 Peak height A3 of the third Gaussian
profile fit, 5/5 (Halphapeakneb) (2)
585 I1 --- Neb [0/2] Nebular emission indication (1)
587-600 F14.10 --- chi2r1 [0/800] Reduced χ2r for the fit (1/5)
(Halpharedchi)
602-615 F14.10 --- chi2r2 [0/820] Reduced χ2r for the fit (2/5)
(Halpharedchi)
617-630 F14.10 --- chi2r3 [0/830] Reduced χ2r for the fit (3/5)
(Halpharedchi)
632-645 F14.10 --- chi2r4 [0/831] Reduced χ2r for the fit (4/5)
(Halpharedchi)
647-660 F14.10 --- chi2r5 [0/831] Reduced χ2r for the fit (5/5)
(Halpharedchi)
662-673 F12.10 --- chi2rf1 [0/0.5] Reduced χ2rf for flux normalized
over whole fitting range(1/5) (Halpharedchi_f)
675-686 F12.10 --- chi2rf2 [0/0.5] Reduced χ2rf for flux normalized
over whole fitting range(2/5) (Halpharedchi_f)
688-699 F12.10 --- chi2rf3 [0/0.5] Reduced χ2rf for flux normalized
over whole fitting range(3/5) (Halpharedchi_f)
701-712 F12.10 --- chi2rf4 [0/0.5] Reduced χ2rf for flux normalized
over whole fitting range(4/5) (Halpharedchi_f)
714-725 F12.10 --- chi2rf5 [0/0.5] Reduced χ2rf for flux normalized
over whole fitting range(5/5) (Halpharedchi_f)
727-742 A16 --- Cat Category in our classification scheme of Table 2
(Emission/Absorption/Nebular) (Halpha_category)
745 I1 --- St [0/1] 1 for intrinsic stellar emission
(Halpha_intrinsic) (1)
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Note (1): Nebular emission flag as follows:
0 = no indication of nebular emission (in which case the flag for intrinsic
stellar emission is 1)
1 = presence of [NII] emission in object spectrum
2 = presence of Hα and [NII] emission in sky spectra (see Appendix A.2)
Note (2): Each of the 3 Gaussian profiles (third is the nebular component)
has 3 parameters λi, σi and Ai, which represent the
centre, standard deviation and peak height (relative to the normalized flux),
respectively. The first 5 solutions are given for each Gaussian profile,
order by χ2r.
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Byte-by-byte Description of file: tabled2.dat
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Bytes Format Units Label Explanations
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1- 16 A16 --- Cname Sexagesimal, equatorial position-based source
name (HHMMSSss+DDMMSSs) (CNAME)
18- 25 F8.4 deg RAdeg Right ascension (J2000)
27- 35 F9.5 deg DEdeg Declination (J2000)
38 I1 --- Ha [0]?=- "0" for no temporal change in
classification category of spectra from
repeated observations (Halphaprofilechange)
40- 70 A31 --- SName Main ID of the source in SIMBAD found for a
given Cname (SIMBADmainid)
73- 81 F9.6 arcsec Off [0/15]?=- Angular distance of the object to the
SIMBAD source (SIMBADangulardistance)
83-584 A502 --- ONames All SIMBAD identifiers for the SIMBAD source
(SIMBAD_identifiers)
586-632 A47 --- oType SIMBAD object type for the source SIMBAD source
(SIMBAD_otype)
637-647 A11 --- SpT SIMBAD spectral type for the source SIMBAD
source (SIMBAD_stype)
649-680 A32 --- ADS A comma-separated list of indices (in tabled3)
where we list the ADS references ordered by the
number of occurrences for all analysed objects
(ADS_literature)
682-683 I2 --- VR [0/11] Number of VizieR tables for Radio
wavelength range in which object with Cname has
a match (VizieRnRadio)
685-686 I2 --- VIR [0/60] Number of VizieR tables for IR wavelength
range in which object with Cname has a match
(VizieRnIR)
688-689 I2 --- Vopt [0/61] Number of VizieR tables for optical
wavelength range in which object with Cname has
a match (VizieRnoptical)
691-692 I2 --- VUV [0/2] Number of VizieR tables for UV wavelength
range in which object with Cname has a match
(VizieRnUV)
694-695 I2 --- VEUV [0] Number of VizieR tables for Extreme-UV
wavelength range in which object with Cname has
a match (VizieRnEUV)
697-698 I2 --- VX [0/25] Number of VizieR tables for X-ray
wavelength range in which object with Cname has
a match (VizieRnXray)
700-701 I2 --- VG [0/3] Number of VizieR tables for Gamma-ray
wavelength range in which object with Cname
has a match (VizieRnGammaray)
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Byte-by-byte Description of file: tabled3.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- Ref [1/98] Reference number
4- 6 I3 --- N [1/157] Number of objects from the catalogue
that have corresponding article in the search
results from ADS (for N≥50)
8- 26 A19 --- BibCode BibCode
28- 53 A26 --- Aut Author's name
55- 73 A19 --- Com Comments
75-269 A195 --- Title Title of the paper
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Acknowledgements:
Gregor Traven, gregor.traven(at)fmf.uni-lj.si
(End) Patricia Vannier [CDS] 10-Jul-2015