J/AJ/123/2597 Hα stars and HH objects near BRCs (Ogura+, 2002)
Hα emission stars and Herbig-Haro objects in the vicinity of
bright-rimmed clouds.
Ogura K., Sugitani K., Pickles A.
<Astron. J. 123, 2597 (2002)>
=2002AJ....123.2597O 2002AJ....123.2597O
ADC_Keywords: H II regions ; Infrared sources ; Stars, pre-main sequence ;
Stars, emission
Keywords: H II regions - ISM: globules - ISM: Herbig-Haro objects -
stars: formation - stars: pre-main-sequence
Abstract:
Bright-rimmed clouds (BRCs) found in H II regions are probably sites
of triggered star formation due to compression by ionization/shock
fronts. Many BRCs harbor IRAS point sources of low dust temperature.
They also frequently contain a small cluster of near-IR stars that is
elongated along the axis of the BRC. Here we present the results of
our Hα grism spectroscopy and narrowband imaging observations of
BRCs in search of candidate premain-sequence stars of the T Tauri,
Herbig Ae/Be and related types, and Herbig-Haro (HH) objects. We have
detected a large number (460) of Hα emission stars down to a
limiting magnitude of about R=20 in and around all but two of the 28
BRCs observed. The present study has, for the first time, reached down
nearly to the faintest classical T Tauri star population in OB
associations. A total of 12 new HH objects have been found.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table4.dat 69 28 Bright-Rimmed Clouds observed
table5.dat 104 463 Detected Hα Emission Stars
table7.dat 40 34 Herbig-Haro objects in/around BRCS
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See also:
V/104 : General Catalogue of Herbig-Haro Objects (Reipurth+, 1999)
J/AJ/135/2323 : Updated and corrected Table 5 (Ikeda+, 2008)
Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1- 8 A8 --- BRC BRC name
11- 27 A17 --- HII HII region name
28- 31 I4 pc Dist ? Distance
33- 34 I2 --- r_Dist ? References for Distance (1)
37- 47 A11 --- IRAS Associated IRAS source name
49- 50 I2 --- NHa Number of Hα stars
52- 63 A12 --- SName Simbad name of the BRC
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Note (1): References:
1: MacConnell, 1968ApJS...16..275M 1968ApJS...16..275M
2: Savage et al., 1977ApJ...216..291S 1977ApJ...216..291S
3: Ishida, 1970PASJ...22..277I 1970PASJ...22..277I
4: Claria, 1974A&A....37..229C 1974A&A....37..229C
5: Humphreys, 1978ApJS...38..309H 1978ApJS...38..309H
6: Bally & Scoville, 1980ApJ...239..121B 1980ApJ...239..121B
7: Matthews, 1979A&A....75..345M 1979A&A....75..345M
8: Georgelin & Georgelin 1976.
9: Crampton & Fisher, 1974PDAO...14..283C 1974PDAO...14..283C
10: Seggewiss, 1968VeBon..79....1S 1968VeBon..79....1S
11: Herbst et al., 1982AJ.....87...98H 1982AJ.....87...98H
12: Strom et al., 1989ApJS...71..183S 1989ApJS...71..183S
13: Blaauw, 1964ARA&A...2..213B 1964ARA&A...2..213B
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Byte-by-byte Description of file: table5.dat
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Bytes Format Units Label Explanations
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1- 8 A8 --- BRC The Bright-Rimmed Cloud name
10- 11 I2 --- Seq The Bright-Rimmed Cloud star number (1)
13- 14 I2 h RAh Hour of Right Ascension (J2000)
16- 17 I2 min RAm Minute of Right Ascension (J2000)
19- 22 F4.1 s RAs Second of Right Ascension (J2000)
23 A1 --- u_RAs [:] Indicates the RA accuracy is poor
25 A1 --- DE- Sign of the Declination (J2000)
26- 27 I2 deg DEd Degree of Declination (J2000)
29- 30 I2 arcmin DEm Arcminute of Declination (J2000)
32- 33 I2 arcsec DEs Arcsecond of Declination (J2000)
34 A1 --- u_DEs [:] Indicates the Dec accuracy is poor
36- 40 F5.1 0.1nm EqWid ? The Hα equivalent width in Angstroms
42- 43 A2 --- f_EqWid Eye estimate code for EqWid (2)
45 A1 --- u_EqWid [:] Indicates the EqWid accuracy is poor (3)
47-106 A60 --- Com Remarks
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Note (1): Star numbers identifying the stars in the finding charts
Figures 1a to 1z.
In Simbad, the stars are identified as [OSP2002] BRC Seq,
i.e. "[OSP2002] BRC 1 1" for "BRC01 1"
Note (2): For stars where only eye estimates of their emission strengths
were possible
w = weak (0.5 to 2Å);
m = moderate (2 to 5Å);
s = strong (5 to 10Å);
vs = very strong (over 10Å).
Note (3): Poor accuracy because of the difficulty of continuum determination.
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Byte-by-byte Description of file: table7.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- SFO ? BRC number (SFO NN in Simbad)
4- 17 A14 --- Knot HH knot name
20- 21 I2 h RAh Right ascension (J2000.0)
23- 24 I2 min RAm Right ascension (J2000.0)
26- 29 F4.1 s RAs Right ascension (J2000.0)
30 A1 --- u_RAs Uncertainty flag on RA
31 A1 --- DE- Declination sign (J2000.0)
32- 33 I2 deg DEd Declination (J2000.0)
35- 36 I2 arcmin DEm Declination (J2000.0)
38- 39 I2 arcsec DEs Declination (J2000.0)
40 A1 --- u_DEs Uncertainty flag on DE
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Patricia Bauer [CDS] 17-Jun-2002