2005A&A...440..819R

Query : 2005A&A...440..819R

2005A&A...440..819R - Astronomy and Astrophysics, volume 440, 819-829 (2005/9-4)

The sub-damped Lyα system toward HE 0001-2340: galaxy formation at z≃2.

RICHTER P., LEDOUX C., PETITJEAN P. and BERGERON J.

Abstract (from CDS):

We present a detailed analysis of chemical abundances in a sub-damped Lyα absorber (sub-DLA) at z=2.187 towards the quasar HE0001-2340 (zem=2.28). Our study is based on high-resolution (R≃45000) spectroscopic data from the UVES instrument installed on the ESO Very Large Telescope (VLT). This sub-DLA system consists of at least 25 individual subcomponents spanning a restframe velocity range of ∼400km/s. The total neutral hydrogen column density is logN(HI)≃19.7. Detected species include CII, CIV, NI, NII, OI, MgII, AlII, AlIII, SIII, SIIV, PII, FeII, and possibly DI. For the dominating neutral gas component at vrel=+13km/s (relative to z=2.187) we derive an oxygen abundance of [O/H]=-1.81±0.07 (1/65 solar). With its extremely low nitrogen content ([N/H]≲-3.3 and [N/O]≲-1.5) the absorber exhibits a classic massive star abundance pattern. Our measurements place the z=2.187 absorber towards HE0001-2340 among the systems with the lowest ever measured [N/α] ratios. The low [N/O] value is consistent with the idea that primary nitrogen production by the very first stars have enriched the intergalactic gas to a level of [N/O]≃-1.5. Peculiar abundances are found in the outermost blue components near -350 km/s (in the z=2.187 restframe) where we observe significant overabundances of phosphorus ([P/C]≃+1.5), silicon ([Si/C]≃+0.6), and aluminum ([Al/C]≃+0.5) after correcting for the effects of ionization. Our study suggests that the line of sight passes through the gaseous environment of one or more stellar clusters that locally enriched their interstellar neighbourhood by supernova ejecta generating the observed abundance anomalies. The large velocity spread of the entire absorption system points to a merger that triggers the formation of these clusters. We thus may be observing a young galaxy at z≃2 that is forming out of a merger event.

Abstract Copyright: ∼

Journal keyword(s): cosmology: observations - Galaxy: abundances - Galaxy: evolution - quasars: absorption lines

Nomenclature: [RLP2005] QSO J0003-2323 abs N.NNN N=1. Table 3: [RLP2005] QSO J0003-2323 abs N.NNNNN N=25 = [RLP2005] AN (Nos A-P, A1-A3, B1-B3, C1, E1).

Status at CDS : All or part of tables of objects will not be ingested in SIMBAD.

Simbad objects: 1

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Number of rows : 1
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 QSO J0003-2323 QSO 00 03 44.9144535192 -23 23 55.073021280     16.7     ~ 78 0

Query : 2005A&A...440..819R

Basic data :
QSO J0003-2323 -- Quasar
Origin of the objects types :

(Ref) Object type as listed in the reference "Ref"
(acronym) Object type linked to the acronym according to the original reference
() Anterior to 2007, before we can link the objet type to a reference, or given by the CDS team in some particular cases

Other object types: 		QSO (2010A&A,QSO,...), * (Gaia), NIR (2MASS), Opt (SDSS)
Syntax of coordinates is : "ra dec (wtype) [error ellipse] quality bibcode" :
  • ra dec : right ascension and declination (unit and frame defined according to your Output Options)
    Grey values are increasing the original precision due to the computation of frame transformations
  • (wtype) : wavelength class for the origin of the coordinates (Rad, mm, IR, Optical, UV, Xray, Gam)
  • [error ellipse] : measurement uncertainty, on (ra,dec) if the positional angle is 90 degrees, on (majaxis,minaxis) otherwise (in mas at defined epoch in the original catalogue),
    position angle (in degrees North celestial pole to East)
  • quality : flag of quality
    • E ≥ 10"
    • D : 1-10" (and some old data)
    • C : 0.1-1"
    • B : 0.01-0.1" + 2MASS, Tyc
    • A : VLBI, Hipparcos
  • bibcode : bibcode of the coordinates reference
ICRS coord. (ep=J2000) : 		00 03 44.9144535192 -23 23 55.073021280 (Optical) [ 0.0492 0.0397 90 ] A 2020yCat.1350....0G
Syntax of coordinates is : "ra dec (wtype) [error ellipse] quality bibcode" :
  • ra dec : right ascension and declination (unit and frame defined according to your Output Options)
    Grey values are increasing the original precision due to the computation of frame transformations
  • (wtype) : wavelength class for the origin of the coordinates (Rad, mm, IR, Optical, UV, Xray, Gam)
  • [error ellipse] : measurement uncertainty, on (ra,dec) if the positional angle is 90 degrees, on (majaxis,minaxis) otherwise (in mas at defined epoch in the original catalogue),
    position angle (in degrees North celestial pole to East)
  • quality : flag of quality
    • E ≥ 10"
    • D : 1-10" (and some old data)
    • C : 0.1-1"
    • B : 0.01-0.1" + 2MASS, Tyc
    • A : VLBI, Hipparcos
  • bibcode : bibcode of the coordinates reference
FK4 coord. (ep=B1950 eq=1950) : 		00 01 11.4640137289 -23 40 37.426910119 [ 0.0492 0.0397 90 ]
Syntax of coordinates is : "ra dec (wtype) [error ellipse] quality bibcode" :
  • ra dec : right ascension and declination (unit and frame defined according to your Output Options)
    Grey values are increasing the original precision due to the computation of frame transformations
  • (wtype) : wavelength class for the origin of the coordinates (Rad, mm, IR, Optical, UV, Xray, Gam)
  • [error ellipse] : measurement uncertainty, on (ra,dec) if the positional angle is 90 degrees, on (majaxis,minaxis) otherwise (in mas at defined epoch in the original catalogue),
    position angle (in degrees North celestial pole to East)
  • quality : flag of quality
    • E ≥ 10"
    • D : 1-10" (and some old data)
    • C : 0.1-1"
    • B : 0.01-0.1" + 2MASS, Tyc
    • A : VLBI, Hipparcos
  • bibcode : bibcode of the coordinates reference
Gal coord. (ep=J2000) : 		049.3929424263325 -78.5975048155535 [ 0.0492 0.0397 90 ]
Syntax of proper motions is : "pm-ra pm-dec [error ellipse] quality bibcode"
  • pm-ra : mu-ra*cos(dec) (expressed in the ICRS system in mas/yr)
  • pm-dec : mu-dec (expressed in the ICRS system in mas/yr)
  • [error ellipse] : error major axis and minor axis (in mas), orientation angle (in deg)
  • quality : flag of quality (A=best quality -> E=worst quality, {� } =unknown quality)
  • bibcode : bibcode of the proper motion reference
Proper motions mas/yr : 		-0.038 -0.023 [0.061 0.043 90] A 2020yCat.1350....0G
Syntax of radial velocity (or/and redshift) is : "value [error] (wavelength) quality bibcode"
  • value : radial velocity or/and redshift (Heliocentric frame) according to your Output Options
    (redshift may be not displayed if the data value is <0 and the database inside value is a radial velocity)
  • [error] : error of the corresponding value displayed before
  • (wavelength) : wavelength range of the measurement : Rad, mm, IR, Opt, UV, Xray, Gam or  '∼'(unknown)
  • quality : flag of quality ( A=best quality -> E=worst quality, ∼=unknown quality)
  • bibcode : bibcode of the value's origin
Radial velocity / Redshift / cz : 		V(km/s) 248800 [~] / z(spectroscopic) 2.2800 [~] / cz 683527 [~]
   (Opt) D 2017MNRAS.465.2120C
Syntax of parallax is : 'value quality [error] bibcode'
  • value : parallax value
  • quality : flag of quality (A=best quality -> E=worst quality, {� } =unknown quality)
  • [error] : mean error
  • bibcode : bibcode of the parallax reference
Parallaxes (mas): 		0.0202 [0.0611] A 2020yCat.1350....0G
Syntax of fluxes (or magnitudes) is : "filter-name (System) flux-value [error] quality MultVarFlags bibcode"
  • filter-name : U, B, V, R, I, G, J, H, K, u, g, r, i, z
  • (System) : may be AB (default is Vega)
  • flux-value : value of flux or magnitude
  • [error] : error value
  • quality : flag of quality of the flux value ( A=best quality -> E=worst quality, {� } =unknown quality)
  • MultVarFlags : Mult is zero or one char (J) for joined photometry ; Var can be zero or two chars (V[0-4])
  • bibcode : bibcode of the flux reference
Fluxes (5) :
V 16.7 [~] E ~
G 16.352062 [0.003222] C 2020yCat.1350....0G
J 15.363 [0.051] C 2003yCat.2246....0C
H 14.780 [0.058] C 2003yCat.2246....0C
K 13.830 [0.054] C 2003yCat.2246....0C
SIMBAD within arcmin
', {sourceSize:12, color:'#30a090'})); aladin.on('objectClicked', function(object) { var objName=object.data.MAIN_ID; aladin.showPopup(object.ra,object.dec,'',''+ objName+''); });" title="Show Simbad objects"> Overlay Simbad points in this preview
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The link on the acronym of the identifiers give access to the information for this acronym in the dictionary of nomenclature.
Identifiers (13) :
An access of full data is available using the icon Vizier near the identifier of the catalogue

QSO J0003-2323 SDSS J000344.92-232354.8 [VV2003] J000345.0-232355 Gaia DR2 2339814276380341888
HE 0001-2340 SQUAD DR1 J000344-232355 [VV2006] J000345.0-232355
2MASS J00034491-2323548 TIC 20879907 [VV2010] J000345.0-232355
QSO B0001-2340 [VV2000] J000345.0-232355 Gaia DR3 2339814276380341888

References (78 between 1850 and 2024) (Total 78)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).
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Collections of Measurements


velocities : 1    PLX : 1    PM : 2   

   

External archives :

Data at NED - NASA/IPAC Extragalactic Database : QSO J0003-2323

Link by name to the catalogue in VizieR :

2MASS J00034491-2323548 SDSS J000344.92-232354.8 Gaia DR3 2339814276380341888 Gaia DR2 2339814276380341888

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