J/other/RAA/15.1414 E+A galaxy candidates in LAMOST DR2 (Yang+, 2015)
A sample of E+A galaxy candidates in the Second Data Release of LAMOST Survey.
Yang H.-F., Luo A.-L., Chen X.-Y., Hou W., Zhang J.-N., Du W., Zhang J.-F.,
Cai J.-H., Guo Y.-X., Zhang S., Zhao Y.-H., Wu H., Wang T.-G., Shen S.-Y.,
Yang M., Zhang Y., Hou Y.-H.
<Res. Astron. Astrophys., 15, 1414-1423 (2015)>
=2015RAA....15.1414Y 2015RAA....15.1414Y (SIMBAD/NED BibCode)
ADC_Keywords: Surveys ; Galaxy catalogs ; Photometry, SDSS ;
Equivalent widths ; Redshifts
Keywords: galaxies: evolution - galaxies: formation - galaxies: interactions -
galaxies: peculiar - galaxies: starburst
Abstract:
A sample of 70 E+A galaxies is selected from 37206 galaxies in the
second data release of the Large Sky Area Multi-Object Fiber
Spectroscopic Telescope (LAMOST). This sample is selected according to
the criteria for E+A galaxies defined by Goto, and each of these
objects is further visually identified. In this sample, most objects
are low redshift E+A galaxies with z<0.25, and are located in an
area of the sky with high Galactic latitude and magnitude from 14 to
18mag in the g, r and i bands. A stellar population analysis of the
whole sample indicates that the E+A galaxies are characterized by both
young and old stellar populations (SPs), and the metal-rich SPs have
relatively higher contributions than the metal-poor ones.
Additionally, a morphological classification of these objects is
performed based on images taken from the Sloan Digital Sky Survey.
Description:
Table 1 lists the E+A galaxy sample selected from LAMOST DR2 and Table
2 lists some corresponding photometric features. This first E+A galaxy
sample from the LAMOST survey includes 70 objects, in which 56 of them
are newly discovered. These E+A galaxies span a redshift range of
0.0034≤z≤0.2541
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 76 70 The list of E+A galaxies from LAMOST DR2
table2.dat 47 70 The photometric features of our E+A galaxy sample
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See also:
V/146 : LAMOST DR1 catalogs (Luo+, 2015)
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 Sequential number
3- 4 A2 --- n_Seq [+* ] Note on Seq (1)
6- 24 A19 --- Name LAMOST DR2 designation (JHHMMSS.ss+DDMMSS.s)
26- 33 F8.6 --- z Redshift
35- 44 F10.6 deg RAdeg Right ascension (J2000)
46- 54 F9.6 deg DEdeg Declination (J2000)
56- 62 F7.4 0.1nm EW[OII] Equivalent width of [OII] line (2)
64- 69 F6.3 0.1nm EWHd Equivalent width of Hδ line (2)
71- 76 F6.3 0.1nm EWHa Equivalent width of Hα line (2)
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Note (1): Notes as follows:
* = object published or studied in other literatures
+ = EWHδ>5.0Å
Note (2): Emission lines have a negative value.
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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 Sequential number
4- 8 F5.2 mag umag ?=- SDSS u magnitude
10- 14 F5.2 mag gmag ?=- SDSS g magnitude
16- 20 F5.2 mag rmag ?=- SDSS r magnitude
22- 26 F5.2 mag imag ?=- SDSS i magnitude
28- 32 F5.2 mag zmag ?=- SDSS z magnitude
34- 37 F4.2 mag g-r ?=- SDSS g-r colour index
39- 42 F4.2 mag r-i ?=- SDSS r-i colour index
44- 47 A4 --- Class Image classification, visually assigned for
each object based on material from Sect. 3.3
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 25-Nov-2015