J/ApJ/794/156 MgII/FeII absorption profile for 0.3<z<1.4 galaxies (Rubin+, 2014)
Evidence for ubiquitous collimated galactic-scale outflows along
the star-forming sequence at z∼0.5.
Rubin K.H.R., Prochaska J.X., Koo D.C., Phillips A.C., Martin C.L.,
Winstrom L.O.
<Astrophys. J., 794, 156 (2014)>
=2014ApJ...794..156R 2014ApJ...794..156R (SIMBAD/NED BibCode)
ADC_Keywords: Galaxies, spectra ; Spectra, ultraviolet ; Redshifts ;
Equivalent widths
Keywords: galaxies: evolution - galaxies: halos - galaxies: ISM -
ultraviolet: ISM
Abstract:
We analyze Mg II λλ2796, 2803 and Fe II
λλ2586, 2600 absorption profiles in individual spectra
of 105 galaxies at 0.3<z<1.4. The galaxies, drawn from redshift
surveys of the GOODS fields and the Extended Groth Strip, sample the
range in star formation rates (SFRs) occupied by the star-forming
sequence with stellar masses log M*/M☉≳9.6 down to
SFR≳2 M☉/yr at 0.3<z<0.7. Using the Doppler shifts of Mg II
and Fe II absorption as tracers of cool gas kinematics, we detect
large-scale winds in 66±5% of the galaxies. Hubble Space Telescope
Advanced Camera for Surveys imaging and our spectral analysis indicate
that the outflow detection rate depends primarily on galaxy
orientation: winds are detected in ∼89% of galaxies having
inclinations (i) <30° (face-on), while the wind detection rate is
∼45% in objects having i>50° (edge-on). Combined with the
comparatively weak dependence of wind detection rate on intrinsic
galaxy properties, this implies that biconical outflows are ubiquitous
in normal, star-forming galaxies at z∼0.5. We find that wind velocity
is correlated with galaxy M* at 3.4σ significance, while
outflow equivalent width is correlated with SFR at 3.5σ
significance, suggesting hosts with higher SFR launch more material
and/or generate a larger velocity spread for the absorbing clouds.
Assuming the gas is driven into halos with isothermal density
profiles, the wind velocities (∼200-400 km/s) permit escape from the
halo potentials only for the lowest-M*systems in the sample.
However, the gas carries sufficient energy to reach distances ≳50 kpc,
and may therefore be a viable source of material for the massive,
cool circumgalactic medium around bright galaxies at z∼0.
Description:
In this work, we use rest-frame near-UV spectroscopy of a sample of
105 galaxies at 0.3<z<1.4 to examine the kinematics of cool (T≲104K)
gas traced by Mg II λλ2796, 2803 and Fe II
λλ2586, 2600 absorption. This sample, drawn from
redshift surveys of the GOODS and EGS fields (e.g., Wirth et al. 2004,
J/AJ/127/3121; Davis et al. 2003SPIE.4834..161D 2003SPIE.4834..161D; Le Fevre et al.
2005A&A...439..845L 2005A&A...439..845L; Szokoly et al. 2004, J/ApJS/155/271), fully
covers the SFR-M* parameter space occupied by star-forming galaxies
with logM*/Msun≳9.6 down to a SFR limit≳2 Msun/yr at z∼0.5,
permitting exploration of outflow properties over the entire breadth
of the star-forming sequence at z>0.3 for the first time. Our galaxy
sample is drawn from pre-existing photometric and spectroscopic
redshift surveys in fields with deep imaging taken with the Hubble
Space Telescope (HST) Advanced Camera for Surveys (ACS).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 149 147 Derived Galaxy Properties
table3.dat 176 146 Mg II Absorption Line Measurements
table4.dat 176 146 Fe II Absorption Line Measurements
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See also:
J/AJ/127/3121 : TKRS catalog of GOODS-North Field (Wirth+, 2004)
J/ApJS/155/271 : Chandra Deep Field-South: Optical spectroscopy
(Szokoly+, 2004)
Byte-by-byte Description of file: table2.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 14 A14 --- ID Galaxy Name (G1)
16- 17 A2 --- f_ID [* ] Flag on ID (2)
19- 20 I2 h RAh Hour of Right Ascension (J2000)
22- 23 I2 min RAm Minute of Right Ascension (J2000)
25- 29 F5.2 s RAs Second of Right Ascension (J2000)
31 A1 --- DE- Sign of the Declination (J2000)
32- 33 I2 deg DEd Degree of Declination (J2000)
35- 36 I2 arcmin DEm Arcminute of Declination (J2000)
38- 41 F4.1 arcsec DEs Arcsecond of Declination (J2000)
43- 49 F7.5 --- z Redshift
51- 57 A7 --- Morph Morphology (3)
59- 64 F6.2 mag BMag ? Absolute B band magnitude
66- 69 F4.2 mag U-B ? The (U-B) color
71- 74 F4.2 kpc Rad Radius
76- 79 F4.1 deg Inc Inclination
81- 85 F5.1 Msun/yr SFR ? Star Formation Rate
87- 90 F4.1 Msun/yr E_SFR ? Upper limit uncertainty in SFR
92- 95 F4.1 Msun/yr e_SFR ? Lower limit uncertainty in SFR
97-101 F5.2 [Msun] logM* ? Log of stellar mass
103-106 F4.2 [Msun] E_logM* ? Upper limit uncertainty in logM*
108-111 F4.2 [Msun] e_logM* ? Lower limit uncertainty in logM*
113-117 F5.3 Msun/yr/kpc2 SigSFRg ? Global SFR surface density
119-123 F5.3 Msun/yr/kpc2 E_SigSFRg ? Upper limit uncertainty in SigSFRg
125-129 F5.3 Msun/yr/kpc2 e_SigSFRg ? Lower limit uncertainty in SigSFRg
131-136 F6.3 Msun/yr/kpc2 SigSFRm ? Maximum SFR surface density
138-143 F6.3 Msun/yr/kpc2 E_SigSFRm ? Upper limit uncertainty in SigSFRm
145-149 F5.3 Msun/yr/kpc2 e_SigSFRm ? Lower limit uncertainty in SigSFRm
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Note (2): Flag as follows:
* = FIREWORKS photometry is not available for this object;
** = MOIRCS Deep Survey photometry is not available for this object.
Note (3): Noted as follows:
E/SO = early type;
Sab = early spiral;
S = spiral;
Ir = irregular;
compact = compact;
merger = merger.
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 14 A14 --- ID Galaxy Name (G1)
16- 29 A14 --- Cat Category
31- 34 F4.1 1/pix S/N ? Signal-to-Noise ratio
36 A1 --- l_EW2796 [<] Upper 3σ limit flag on EW2796
37- 40 F4.1 0.1nm EW2796 ? Equivalent width of 2796Å line; Angstroms
42- 44 F3.1 0.1nm e_EW2796 ? Uncertainty in EW2796
46 A1 --- l_EW2803 [<] Upper 3σ limit flag on EW2803
47- 50 F4.1 0.1nm EW2803 ? Equivalent width of 2803Å line; Angstroms
52- 54 F3.1 0.1nm e_EW2803 ? Uncertainty in EW2803
56- 60 F5.3 --- Pout1 ? Fraction of 1-component model PPDF with
v<0 km/s
62- 65 I4 km/s Delv1 ? Central velocity for 1-component model
67- 69 I3 km/s E_Delv1 ? Upper limit uncertainty in Delv1
71- 73 I3 km/s e_Delv1 ? Lower limit uncertainty in Delv1
75- 78 F4.2 --- Cf1 ? Covering fraction for 1-component model
80- 83 F4.2 --- E_Cf1 ? Upper limit uncertainty in Cf1
85- 88 F4.2 --- e_Cf1 ? Lower limit uncertainty in Cf1
90- 94 F5.3 --- Pout2 ? Fraction of 2-component model flow component
PPDF with v<0 km/s
96- 99 I4 km/s Delvm ? Maximum outflow velocity (G2)
101-103 I3 km/s E_Delvm ? Upper limit uncertainty in Delvm
105-107 I3 km/s e_Delvm ? Lower limit uncertainty in Delvm
109-112 F4.2 --- Cff ? Covering fraction of flow component (G3)
114-117 F4.2 --- E_Cff ? Upper limit uncertainty in Cff
119-122 F4.2 --- e_Cff ? Lower limit uncertainty in Cff
124-127 I4 km/s vflow ? Central velocity of flow component (G3)
129-131 I3 km/s E_vflow ? Upper limit uncertainty in vflow
133-135 I3 km/s e_vflow ? Lower limit uncertainty in vflow
137-141 F5.2 0.1nm EWflow ? Equivalent width of flow component (G3)
143-146 F4.2 0.1nm E_EWflow ? Upper limit uncertainty in EWflow
148-151 F4.2 0.1nm e_EWflow ? Lower limit uncertainty in EWflow
153 A1 --- l_logN [>] Limit flag on logN (G4)
154-159 F6.1 [cm-2] logN ? Log column density of flow component (G3)
161-164 F4.2 0.1nm EWsys ? Equivalent width of systemic component (G3)
166-169 F4.2 0.1nm E_EWsys ? Upper limit uncertainty in EWsys
171-174 F4.2 0.1nm e_EWsys ? Lower limit uncertainty in EWsys
176 A1 --- f_EWsys [n] Indicates no significant systemic component
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Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 14 A14 --- ID Galaxy Name (G1)
16- 29 A14 --- Cat Category
31- 34 F4.1 1/pix S/N ? Signal-to-Noise ratio
36 A1 --- l_EW2586 [<] Upper 3σ limit flag on EW2586
37- 42 F6.1 0.1nm EW2586 ? Equivalent width of 2586Å line; Angstroms
44- 46 F3.1 0.1nm e_EW2586 ? Uncertainty in EW2586
48 A1 --- l_EW2600 [<] Upper 3σ limit flag on EW2600
49- 54 F6.1 0.1nm EW2600 ? Equivalent width of 2600Å line; Angstroms
56- 58 F3.1 0.1nm e_EW2600 ? Uncertainty in EW2600
60- 64 F5.3 --- Pout1 ? Fraction of 1-component model PPDF with
v<0 km/s
66- 69 I4 km/s Delv1 ? Central velocity for 1-component model
71- 73 I3 km/s E_Delv1 ? Upper limit uncertainty in Delv1
75- 77 I3 km/s e_Delv1 ? Lower limit uncertainty in Delv1
79- 82 F4.2 --- Cf1 ? Covering fraction for 1-component model
84- 87 F4.2 --- E_Cf1 ? Upper limit uncertainty in Cf1
89- 92 F4.2 --- e_Cf1 ? Lower limit uncertainty in Cf1
94- 98 F5.3 --- Pout2 ? Fraction of 2-component model flow component
PPDF with v<0 km/s
100-103 I4 km/s Delvm ? Maximum outflow velocity (G2)
105-107 I3 km/s E_Delvm ? Upper limit uncertainty in Delvm
109-111 I3 km/s e_Delvm ? Lower limit uncertainty in Delvm
113-116 F4.2 --- Cff ? Covering fraction of flow component (G3)
118-121 F4.2 --- E_Cff ? Upper limit uncertainty in Cff
123-126 F4.2 --- e_Cff ? Lower limit uncertainty in Cff
128-131 I4 km/s vflow ? Central velocity of flow component (G3)
133-135 I3 km/s E_vflow ? Upper limit uncertainty in vflow
137-139 I3 km/s e_vflow ? Lower limit uncertainty in vflow
141-144 F4.2 0.1nm EWflow ? Equivalent width of flow component (G3)
146-149 F4.2 0.1nm E_EWflow ? Upper limit uncertainty in EWflow
151-154 F4.2 0.1nm e_EWflow ? Lower limit uncertainty in EWflow
156 A1 --- l_logN [>] Limit flag on logN (G4)
157-161 F5.1 [cm-2] logN ? Log column density of flow component (G3)
163-166 F4.2 0.1nm EWsys ? Equivalent width of systemic component (G3)
168-171 F4.2 0.1nm E_EWsys ? Upper limit uncertainty in EWsys
173-176 F4.2 0.1nm e_EWsys ? Lower limit uncertainty in EWsys
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Global notes:
Note (G1): Galaxies are named according to ID numbers listed in Wirth et al.
(2004, J/AJ/127/3121, TKRS), the AEGIS survey (Davis et al.
2007ApJ...660L...1D 2007ApJ...660L...1D, EGS), and Giavalisco et al. (2004ApJ...600L..93G 2004ApJ...600L..93G).
IDs beginning with numbers mark objects from Giavalisco et al.
(2004ApJ...600L..93G 2004ApJ...600L..93G), and in all instances in the text are preceded with
"J0332".
Note (G2): Defined as Delvm = vflow - bD,flow/sqrt(2).
Note (G3): In the 2-component model.
Note (G4): Lower limits include 95% of the marginalized PPDF.
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History:
From electronic version of the journal
(End) Prepared by [AAS], Tiphaine Pouvreau [CDS] 16-May-2017