J/ApJ/884/L31 Spectra & HST obs. of gal. in 1ES1553+113 field (Johnson+, 2019)
The physical origins of the identified and still missing components of the
warm-hot intergalactic medium: insights from Deep Surveys in the field of
blazar 1ES1553+113.
Johnson S.D., Mulchaey J.S., Chen H.-W., Wijers N.A., Connor T., Muzahid S.,
Schaye J., Cen R., Carlsten S.G., Charlton J., Drout M.R., Goulding A.D.,
Hansen T.T., Walth G.L.
<Astrophys. J., 884, L31 (2019)>
=2019ApJ...884L..31J 2019ApJ...884L..31J
ADC_Keywords: Intergalactic medium; Galaxies, spectra; Redshifts; Surveys;
Photometry, HST; Magnitudes, absolute; BL Lac objects; Optical
Keywords: Intergalactic medium ; quasar absorption line spectroscopy ; Balazars
Abstract:
The relationship between galaxies and the state/chemical enrichment of
the warm-hot intergalactic medium (WHIM) expected to dominate the
baryon budget at low-z provides sensitive constraints on structure
formation and galaxy evolution models. We present a deep redshift
survey in the field of 1ES1553+113, a blazar with a unique combination
of ultraviolet (UV)+X-ray spectra for surveys of the
circumgalactic/intergalactic medium (CGM/IGM).
Nicastro+ (2018Natur.558..406N 2018Natur.558..406N) reported the detection of two OVII
WHIM absorbers at z=0.4339 and 0.3551 in its spectrum, suggesting that
the WHIM is metal rich and sufficient to close the missing baryons
problem. Our survey indicates that the blazar is a member of a z=0.433
group and that the higher-z OVII candidate arises from its intragroup
medium. The resulting bias precludes its use in baryon censuses. The
z=0.3551 candidate occurs in an isolated environment 630kpc from the
nearest galaxy (with stellar mass logM*/M☉∼9.7), which we show
is unexpected for the WHIM. Finally, we characterize the galactic
environments of broad HI Lyα absorbers (Doppler widths of
b=40-80km/s; T≲4x105K) that provide metallicity-independent WHIM
probes. On average, broad Lyα absorbers are ∼2x closer to the
nearest luminous (L>0.25L*) galaxy (700kpc) than narrow (b<30km/s;
T≲4x105K) ones (1300kpc) but ∼2x further than OVI absorbers (350kpc).
These observations suggest that gravitational collapse heats portions
of the IGM to form the WHIM, but with feedback that does not enrich
the IGM far beyond galaxy/group halos to levels currently observable
in UV/X-ray metal lines.
Description:
To study the relationship between galaxies and the intergalactic
medium (IGM), we conducted a deep and highly complete redshift survey
targeting galaxies of mr<23.5mag in the field of 1ES 1553+113 with
multi-slit spectrographs on the Magellan Telescopes. We acquired deep
g-, r-, and i-band images with MOSAIC on the Mayall telescope with
1800s of exposure in each filter under 1" seeing (PI: Johnson;
PID: 2015A-0187) and an HST image with the ACS+F814W filter and 1200s
of exposure (PI: Mulchaey; PID: 13024).
The COS instrument team acquired G130M+G160M spectra of 1ES 1553+113
(PI: Green; PID: 11520, 12025). We retrieved all available COS spectra
for 1ES 1553+113 from the HST archive.
Objects:
----------------------------------------------------------
RA (ICRS) DE Designation(s)
----------------------------------------------------------
15 55 43.04 +11 11 24.4 1ES 1553+113 = QSO B1553+113
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 84 940 Redshift survey summary with galaxies
grouped by redshift
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See also:
J/ApJ/701/1219 : Galaxy survey in 3 QSO fields (Chen+, 2009)
J/ApJS/193/28 : Galaxy survey around 20 UV-bright quasars (Prochaska+, 2011)
J/MNRAS/434/1765 : Catalog of galaxies around PKS 0405-123 (Johnson+, 2013)
J/A+A/570/A126 : XShooter spectrum of 4 BL Lacs (Landoni+, 2014)
J/MNRAS/445/2061 : Absorption in multiphase CGM (Liang+, 2014)
J/MNRAS/449/3263 : Extended galaxy halo gas through HI and OVI (Johnson+, 2015)
J/ApJ/817/111 : HST/COS survey of z<0.9 AGNs. I. (Danforth+, 2016)
J/ApJS/237/11 : Redshift survey near HST/COS AGN sight lines (Keeney+, 2018)
J/A+A/645/A137 : BVRI light curves of PG 1553+113 (Agarwal+, 2021)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 2 I2 h RAh [15] Hour of Right Ascension (J2000)
4- 5 I2 min RAm [54/56] Minute of Right Ascension (J2000)
7- 11 F5.2 s RAs Second of Right Ascension (J2000)
13 A1 --- DE- [+] Sign of the Declination (J2000)
14- 15 I2 deg DEd [10/11] Degree of Declination (J2000)
17- 18 I2 arcmin DEm Arcminute of Declination (J2000)
20- 23 F4.1 arcsec DEs Arcsecond of Declination (J2000)
25- 29 F5.2 mag gmag [15.9/27.1] KPNO/MOSAIC apparent g band
AB magnitude
31- 35 F5.2 mag rmag [15.2/25.1] KPNO/MOSAIC apparent r band
AB magnitude
37- 41 F5.2 mag imag [14.8/24.7] KPNO/MOSAIC apparent i band
AB magnitude
43 A1 --- q_zGal Quality flag on zGal (1)
45- 50 F6.4 --- zGal [0.0017/2.98] Galaxy redshift
52- 56 F5.2 mag g-r [-0.2/1.6]? Absolute, rest-frame (g-r) color
58- 63 F6.2 mag rMag [-25/-9.6]? Absolute, rest-frame r band
magnitude
65- 69 F5.2 [Msun] logM* [5.8/11.9]? log stellar mass
71- 75 F5.1 arcsec dTheta [13/839] Projected angular distance
from the blazar sightline (Δθ)
77- 82 F6.1 kpc Sep [27.8/6258.7] Physical separation (d)
from the blazar sightline
84 A1 --- n_zGal [a-d] Redshift group (2)
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Note (1): Quality flag as follows:
g = secure redshift (879 occurrences).
s = single-line redshift (61 occurrences).
Note (2): Redshift group as follows:
a = zGal>0.4387 (375 occurrences)
b = zGal=0.4291-0.4387 (78 occurrences)
c = zGal=0.3506-0.3596 (12 occurrences)
d = other redshifts (475 occurrences)
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Nomenclature note:
Glaxies are <[JMC2019] JHHMMSS.ss+DDMMSS.s> in Simbad.
History:
From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 30-Mar-2021