J/ApJS/160/511 Orion Nebula Cluster proplyd candidates (Kastner+, 2005)
X-ray emission from Orion Nebula Cluster stars with circumstellar disks and
jets.
Kastner J.H., Franz G., Grosso N., Bally J., McCaughrean M.J., Getman K.,
Feigelson E.D., Schulz N.S.
<Astrophys. J. Suppl. Ser., 160, 511-529 (2005)>
=2005ApJS..160..511K 2005ApJS..160..511K
ADC_Keywords: Clusters, open ; Interstellar medium ; Stars, pre-main sequence ;
X-ray sources
Keywords: circumstellar matter - ISM: Herbig-Haro objects -
open clusters and associations: individual (Orion Nebula Cluster) -
planetary systems: protoplanetary disks - stars: pre-main-sequence -
X-rays: stars
Abstract:
We investigate the X-ray and near-infrared emission properties of a
sample of pre-main-sequence (PMS) stellar systems in the Orion Nebula
Cluster (ONC) that display evidence for circumstellar disks
("proplyds") and optical jets in Hubble Space Telescope (HST) imaging.
Our study uses X-ray data acquired during Chandra Orion Ultradeep
Program (COUP) observations, as well as complementary optical and
near-infrared data recently acquired with HST and the Very Large
Telescope (VLT), respectively.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 107 150 Orion Nebula Cluster proplyd candidates
table2.dat 65 22 Objects not considered proplyds
table3.dat 73 101 Proplyds with COUP counterparts: optical and
X-ray properties
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See also:
J/ApJS/160/319 : COUP: observations and source lists (Getman+, 2005)
J/AJ/111/846 : Orion HST survey (O'Dell+ 1996)
J/AJ/119/3026 : Circumstellar disk candidates in Orion (Rebull+, 2000)findcat
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 9 A9 --- Name Proplyd name (G1)
11 A1 --- n_Name [ij] Individual notes (1)
13- 14 I2 h RAh Hour of Right Ascension (J2000) (2)
16- 17 I2 min RAm Minute of Right Ascension (J2000) (2)
19- 24 F6.3 s RAs Second of Right Ascension (J2000) (2)
26 A1 --- DE- Sign of the Declination (J2000) (2)
27- 28 I2 deg DEd Degree of Declination (J2000) (2)
30- 31 I2 arcmin DEm Arcminute of Declination (J2000) (2)
33- 36 F4.1 arcsec DEs Arcsecond of Declination (J2000) (2)
38- 41 I4 --- VLT ? The VLT infrared (JHK) source number
43 A1 --- f_VLT [NO] Flag on VLT (3)
45- 48 F4.2 arcsec Del-I ? ACS image and infrared source position offset
50- 53 I4 --- COUP ? COUP X-ray source number
55 A1 --- f_COUP [N?kO] Flag on COUP (4)
57- 61 F5.2 arcsec Del-X ? ACS image and X-ray source position offset
62 A1 --- u_Del-X Uncertainty flag on Del-X
64- 65 A2 --- Star? [YN? ] Star apparent in ACS image?
67-107 A41 --- App Appearance in ACS image (5)
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Note (1): Flag on Name, defined as follows:
i = Proplyd 044-527 is a new identification;
j = d163-026s is found ∼0.4" from COUP 796 (=MLLA-956) and d239-334 is
found ∼0.6" from COUP 1268 (=MLLA-347), but optical/IR sources near
these proplyds are in fact the X-ray sources; see Fig. 7 of
Bally et al. (2000AJ....119.2919B 2000AJ....119.2919B). In addition, COUP 1316 lies at a
companion to d253-1536.
Note (2): Determined from ACS images; for sources outside ACS FOV, coordinates
are from Bally et al. (2000AJ....119.2919B 2000AJ....119.2919B), Smith et al.
(2005AJ....129..382S 2005AJ....129..382S), or O'Dell & Wong (1996, Cat. J/AJ/111/846).
See text.
Note (3): Flag on VLT, defined as follows:
N = no IR counterpart detected;
O = candidate is outside the VLT image FOV.
Note (4): Flag on COUP, defined as follows:
N = no X-ray counterpart detected;
? = uncertain COUP assignment;
k = COUP 814 lies very near the position of 166-519, but may instead be
associated with a companion. See Section 4.2.
O = candidate is outside the COUP FOV.
Note (5): "I-front" indicates ionization front apparent.
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 7 A7 --- [OW94] Object name as in O'Dell & Wong, J/AJ/111/846
9- 10 I2 h RAh Hour of Right Ascension (J2000.0)
12- 13 I2 min RAm Minute of Right Ascension (J2000.0)
15- 19 F5.2 s RAs Second of Right Ascension (J2000.0)
21 A1 --- DE- Sign of the Declination (J2000.0)
22- 23 I2 deg DEd Degree of Declination (J2000.0)
25- 26 I2 arcmin DEm Arcminute of Declination (J2000.0)
28- 31 F4.1 arcsec DEs Arcsecond of Declination (J2000.0)
33- 36 I4 --- COUP ? COUP source number
38 A1 --- n_Offset [*] n/a
39- 42 F4.2 arcsec Offset ? Offset between visual position (as determined
from ACS image) and COUP X-ray source position
44- 65 A22 --- Com Comments
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 9 A9 --- Name Proplyd name (G1)
11- 19 A9 --- SpType Spectral type
21- 24 F4.2 mag AV ? The V band extinction
26- 29 I4 --- COUP The COUP number
31- 35 F5.1 ks Exp Effective exposure time
37- 41 I5 ct Cts Net photon counts after background subtraction
43- 47 F5.2 --- HR2 ? COUP X-ray hardness ratio 2 (1)
49- 52 F4.2 --- e_HR2 ? Uncertainty in HR2
54- 58 F5.2 --- HR3 ? COUP X-ray hardness ratio 3 (2)
60- 63 F4.2 --- e_HR3 ? Uncertainty in HR3
65- 68 F4.1 [cm-2] logNH Log of the hydrogen absorbing column (3)
70- 73 F4.1 [mW/m2] logL Log of the total 0.5-8keV luminosity (4)
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Note (1): Defined as (Cs-Cm)/(Cs+Cm) where Cs is counts in
the 0.5-1.7keV band and Cm is counts in the 1.7-2.8keV band.
Note (2): Defined as (Cm-Ch)/(Cm+Ch) where Cm is counts in
the 1.7-2.8keV band and Ch is counts in the 2.8-8.0keV band.
Note (3): Derived from spectral model fitting.
Note (4): Corrected for absorption, as derived from spectral model fitting and
in units of erg/s/cm2.
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Global Notes:
Note (G1): Proplyd candidates with prefix "d" are from lists in
Bally et al. (2000AJ....119.2919B 2000AJ....119.2919B) or
Smith et al. (2005AJ....129..382S 2005AJ....129..382S):
[BOM2000] dSSs-MSS or [BOM2000] dSSs-MMSS in Simbad;
all other candidates are from
O'Dell & Wong (1996, Cat. J/AJ/111/846):
[OW94] SSs-MSS or [OW94] SSs-MMSS in Simbad.
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Marianne Brouty [CDS] 05-Jul-2006