2021RAA....21...83C

Query : 2021RAA....21...83C

2021RAA....21...83C - Research in Astron. and astroph., 21, 83-83 (2021/April-0)

The Mg II absorption line systems in quasar spectra from the Large Sky Area Multi-Object Fiber Spectroscopic Telescope.

CHEN Z.-F., QIN H.-C., GAO Y.-C., GUI R.-J., CHEN Z.-G. and PANG T.-T.

Abstract (from CDS):

Making use of quasar spectra from LAMOST, in the spectral data around the Mg II emission lines, research described in this paper has detected 217 Mg II narrow absorption lines (NALs) with Wλ2796r ≥3σw and Wλ2803r ≥2σ_w$ in a redshift range of 0.4554 ≤z_abs_ ≤2.1110. For quasars observed by both LAMOST and SDSS, we find that 135 Mg II NALs were obviously observed in the LAMOST spectra, 347 Mg II NALs were were apparent in the SDSS spectra, and 132 Mg II NALs were clearly present in both the SDSS and LAMOST spectra. The missed Mg II NALs are likely ascribed to low signal-to-noise ratios of corresponding spectra. Among the Mg II NALs obviously observed in SDSS or LAMOST spectra, eight Mg II NALs were significantly changed with |ΔWλ2796r| ≥3σw in time intervals of ΔMJD/(1 + z_em_) = 359 - 2819 d.

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Journal keyword(s): line: identification - quasars: absorption lines - quasars: general

Simbad objects: 20

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Number of rows : 20
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 SDSS J010135.45+071021.1 QSO 01 01 35.4533461920 +07 10 21.234171540           ~ 4 0
2 [VV2006] J033124.6-000553 QSO 03 31 24.5991666048 -00 05 54.207381876   19.60 19.23     ~ 27 0
3 2MASS J08100162+2031125 QSO 08 10 01.5999955392 +20 31 12.835833492   18.45 18.27     ~ 26 0
4 [VV2006] J082547.9+393639 QSO 08 25 47.8446832824 +39 36 38.799900468   19.74 19.37     ~ 24 0
5 [VV2006] J092746.6+105659 QSO 09 27 46.5123861432 +10 56 59.638235748   19.52 19.29     ~ 22 0
6 2MASS J09342126+1508130 QSO 09 34 21.2957047392 +15 08 13.393313520   18.41 18.21     ~ 18 0
7 [VV2000] J093442.3+224439 QSO 09 34 42.2621553504 +22 44 39.500185776   17.27 17.08     ~ 21 0
8 2MASS J09510842+1601567 QSO 09 51 08.4234272160 +16 01 56.769094956   18.36 18.04     ~ 15 0
9 SDSS J101443.21+310721.6 QSO 10 14 43.2035184552 +31 07 21.649631448   19.82 19.41     ~ 18 0
10 [VV2006] J105817.3+503819 QSO 10 58 17.2987907448 +50 38 19.589093628   18.98 18.63     ~ 25 0
11 [VV2006] J110303.0+084103 QSO 11 03 02.9911708680 +08 41 03.427123092   19.39 19.17     ~ 29 0
12 SDSS J112654.96+163136.3 QSO 11 26 54.9711628632 +16 31 36.409421496   19.16 18.94     ~ 15 0
13 [VV2006] J112733.5+543607 QSO 11 27 33.4469164464 +54 36 07.606711836   18.74 18.53     ~ 24 0
14 SDSS J114744.34+330507.7 QSO 11 47 44.3516612040 +33 05 07.687774572   18.11 17.85     ~ 23 0
15 [VV2006] J114856.8+573820 QSO 11 48 56.8172110680 +57 38 20.119927164   18.59 18.38     ~ 28 0
16 [VV2006] J125058.1+570921 QSO 12 50 58.1063554200 +57 09 21.523621248   18.50 18.21     ~ 28 0
17 2MASS J13511489+3605056 QSO 13 51 14.8602295656 +36 05 05.487956412   18.76 18.54     ~ 27 0
18 SDSS J145112.17+171601.6 QSO 14 51 12.1714230072 +17 16 01.700496408   18.95 18.81     ~ 16 0
19 QSO B1449-012 Bla 14 51 47.4123828360 -01 27 35.309013660   17.19 16.70 16.77   ~ 77 1
20 [VV2000] J150759.0+020053 QSO 15 07 59.0606834112 +02 00 53.841474576   17.18 16.77     ~ 32 0

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