J/ApJ/855/68 Massive stars in the SDSS-IV/APOGEE SURVEY. I. (Roman-Lopes+, 2018)
Massive stars in the SDSS-IV/APOGEE SURVEY. I. OB stars.
Roman-Lopes A., Roman-Zuniga C., Tapia M., Chojnowski D.,
Gomez Maqueo Chew Y., Garcia-Hernandez D.A., Borissova J., Minniti D.,
Covey K.R., Longa-Pena P., Fernandez-Trincado J.G., Zamora O., Nitschelm C.
<Astrophys. J., 855, 68 (2018)>
=2018ApJ...855...68R 2018ApJ...855...68R
ADC_Keywords: Stars, OB; Spectra, optical; Equivalent widths; Surveys;
Photometry, infrared; Spectral types
Keywords: infrared: stars ; stars: early-type ; stars: massive ; surveys
Abstract:
In this work, we make use of DR14 APOGEE spectroscopic data to study a
sample of 92 known OB stars. We developed a near-infrared
semi-empirical spectral classification method that was successfully
used in case of four new exemplars, previously classified as later
B-type stars. Our results agree well with those determined
independently from ECHELLE optical spectra, being in line with the
spectral types derived from the "canonical" MK blue optical system.
This confirms that the APOGEE spectrograph can also be used as a
powerful tool in surveys aiming to unveil and study a large number of
moderately and highly obscured OB stars still hidden in the Galaxy.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 72 92 OB stars in the APOGEE survey
table2.dat 47 92 Line properties for OB stars in APOGEE
refs.dat 80 37 References
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See also:
III/23 : MK Classification for OB Stars (Lesh 1968)
III/112 : Spectral Classes in Kapteyn areas 2-43 (Bartaya, 1983)
III/195 : Atlas of Optical Spectral Classif. OB Stars (Walborn+ 1990)
III/274 : Galactic O-Star Spectroscopic Survey (GOSSS) (Sota+, 2014)
J/ApJS/2/389 : Observations of O and B stars (Hiltner, 1956)
J/ApJ/454/151 : OB Associations of the Northern Milky Way (Massey+ 1995)
J/ApJ/508/397 : H-band Spectral Standards (Meyer+ 1998)
J/A+AS/137/451 : Radial velocities. IX. (Grenier+, 1999)
J/ApJ/541/841 : UBV photometry and ages of Trapezium systems (Abt+, 2000)
J/ApJ/664/1102 : RV survey of Cyg OB2 association (Kiminki+, 2007)
J/A+A/470/161 : UBV photom. of HII regions exciting stars (Russeil+, 2007)
J/ApJS/176/216 : MK spectral types of Visual Multiples (Abt, 2008)
J/MNRAS/384/1675 : BVRIc photometry of Stock 8 (Jose+, 2008)
J/AJ/151/144 : ASPCAP weights for APOGEE chemical elements (Garcia+, 2016)
J/MNRAS/461/2288 : Infall motions in massive star-forming regions (He+, 2016)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- Seq [1/92] Star, internal running number
4- 21 A18 --- APOGEE APOGEE ID (2MHHMMSSss+DDMMSSs ; J2000)
23- 34 A12 --- ID Literature name
36- 41 F6.2 mag Hmag [5.8/10.3]? 2MASS H magnitude
43- 49 A7 --- SpT Spectral type, taken from the literature
51- 56 A6 --- Class Luminosity class
58- 68 A11 --- Qual Spectral type qualifier
70- 72 I3 --- Ref [1/37]? Reference for SpT and Class
(see refs.dat file)
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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- 2 I2 --- Seq [1/92] Star, internal running number
4- 7 F4.2 0.1nm EW-HI(Br11) [0.5/5.5] Equivalent Width, HI (Br11)
in Angstroms units
9- 12 F4.1 0.1nm FWHM-HI(Br11) [11.7/54.4]? Full width half maximum,
HI (Br11), in Angstroms units
14- 17 F4.2 0.1nm EW-HI(Br13) [0.3/5.3]? Equivalent Width, HI (Br13)
in Angstroms units
19- 23 F5.2 0.1nm FWHM-HI(Br13) [13.6/60.6]? Full width half maximum,
HI (Br13), in Angstroms units
25- 30 F6.2 0.1nm EW-HII(7-12) [0.08/27]? Equivalent Width, HII (7-12)
in Angstroms units
32- 36 F5.2 0.1nm FWHM-HII(7-12) [6/22]? Full width half maximum,
HII (7-12), in Angstroms units
38- 41 F4.2 0.1nm EW-HII(7-13) [0.1/0.8]? Equivalent Width, HII (7-13)
in Angstroms units
43- 47 F5.2 0.1nm FWHM-HII(7-13) [8/26.6]? Full width half maximum,
HII (7-13), in Angstroms units
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Byte-by-byte Description of file: refs.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- Ref [1/40] Reference code
4- 40 A37 --- Auth Author's name(s)
42- 60 A19 --- BibCode Bibcode of the reference
62- 80 A19 --- Comm Comment
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Acknowledgements:
Alexandre Roman Lopes [Universidad de La Serena, Chile]
History:
From electronic version of the journal -
References updated by the author in Table 1.
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 03-Jan-2019