THE RADIAL AND AZIMUTHAL PROFILES OF Mg ii ABSORPTION AROUND 0.5 < z < 0.9 zCOSMOS GALAXIES OF DIFFERENT COLORS, MASSES, AND ENVIRONMENTS

By R. Bordoloi, S. Lilly, C. Knobel, M. Bolzonella, P. Kampczyk, C. Carollo, A. Iovino, Elena Zucca, Thierry Contini, Jean-Paul Kneib and 43 more. 2011

199 citations recorded by the source corpus.

We map the radial and azimuthal distribution of Mg ii gas within ∼ 200 kpc (physical) of ∼ 4000 galaxies at redshifts 0.5 < z < 0.9 using co-added spectra of more than 5000 background galaxies at z > 1. We investigate the variation of Mg ii rest-frame equivalent width (EW) as a function of the radial impact parameter for different subsets of foreground galaxies selected in terms of their rest-frame colors and masses. Blue galaxies have a significantly higher average Mg ii EW at close galactocentric radii as compared to the red galaxies. Among the blue galaxies, there is a correlation between Mg ii EW and galactic stellar mass of the host galaxy. We also find that the distribution of Mg ii absorption around group galaxies is more extended than that for non-group galaxies, and that groups as a whole have more extended radial profiles than individual galaxies. Interestingly, these effects can be satisfactorily modeled by a simple superposition of the absorption profiles of individual member galaxies, assuming that these are the same as those of non-group galaxies, suggesting that the group environment may not significantly enhance or diminish the Mg ii absorption of individual galaxies. We show that there is a strong azimuthal dependence of the Mg ii absorption within 50 kpc of inclined disk-dominated galaxies, indicating the presence of a strongly bipolar outflow aligned along the disk rotation axis. There is no significant dependence of Mg ii absorption on the apparent inclination angle of disk-dominated galaxies.

Subfields: Aerospace Engineering, Electrical and Electronic Engineering, Radiation

View Paper: https://www.semanticscholar.org/paper/f1bb64d1e4852ddda3ed4866607233983f219e30

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In Aerospace Engineering

1. N. F. Förster Schreiber
2. R. Genzel
3. J. Cohen
4. C. Carollo
5. Neal Katz
6. P. V. van Dokkum
7. Richard S. Ellis
8. Roger Davies

In Electrical and Electronic Engineering

1. Richard S. Ellis
2. M. Ouchi
3. M. Strauss
4. Jenny E. Greene
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7. C. Hirata
8. T. Heckman

In Radiation

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Citations in the corpus

• Bimodality of low-redshift circumgalactic O VI in non-equilibrium EAGLE zoom simulations (2016, unknown): “Other recent studies have also characterised the CGM relative to samples of galaxies, including Chen et al. (2010); Bordoloi et al. (2011); Kacprzak et al. (2011); Borthakur et al. (2013); Churchill et al. (2013); Nielsen et al. (2013); Stocke et al. (2013); Liang & Chen (2014); Kacprzak et al.…”
• TRACING OUTFLOWS AND ACCRETION: A BIMODAL AZIMUTHAL DEPENDENCE OF Mg ii ABSORPTION (2012, unknown): “…et al. 2007; Zibetti et al. 2007; Martin & Bouché 2009; Weiner et al. 2009; Chelouche & Bowen 2010; Nestor et al. 2011; Noterdaeme et al. 2010; Bordoloi et al. 2011; Coil et al. 2011; Rubin et al. 2010; Ménard & Fukugita 2012; Martin et al. 2012) and accretion onto host galaxies (Steidel et…”
• THE SINS/zC-SINF SURVEY of z ∼ 2 GALAXY KINEMATICS: OUTFLOW PROPERTIES (2012, result): “The trend with inclination supports a bipolar outflow emerging perpendicularly from the plane of the star-forming disk, consistent with the results of Kornei et al. (2012, at z ∼ 1), Chen et al. (2010, at z ∼ 0), Bouché et al. (2012) and Bordoloi et al. (2011) (but see Law et al. (2012)).”
• Extragalactic science, cosmology, and Galactic archaeology with the Subaru Prime Focus Spectrograph (2012, methodology): “We will also stack background galaxy and quasar spectra as a function of impact parameter around foreground galaxies to map out the gas kinematics in the outer halos of star forming galaxies (e.g., Steidel et al. 2010; Tumlinson et al. 2011; Bordoloi et al. 2011).”
• How Stellar Feedback Simultaneously Regulates Star Formation and Drives Outflows (2015, unknown): “…& Sandage 1963; Burbidge et al. 1964; Heckman et al. 1990, 2000, 2015; Martin 1996, 1998, 1999, 2005, 2006; Weiner et al. 2009; Steidel et al. 2010; Bordoloi et al. 2011; Martin et al. 2012; Bouché et al. 2012; Diamond-Stanic et al. 2012; Leitherer et al. 2013; Chisholm et al. 2014; seeVeilleux et…”
• THE COS-HALOS SURVEY: RATIONALE, DESIGN, AND A CENSUS OF CIRCUMGALACTIC NEUTRAL HYDROGEN (2013, background): “It must also be shown that the apparent change in absorption properties in a group sample is not caused simply by the superposition of gas inside the Rvir of group members, as has been claimed for, e.g. Mg II-traced CGM gas by Bordoloi et al. (2011).”
• EVIDENCE FOR UBIQUITOUS COLLIMATED GALACTIC-SCALE OUTFLOWS ALONG THE STAR-FORMING SEQUENCE AT z ∼ 0.5 (2013, background): “1 is suggestive of wind collimation (Bordoloi et al. 2011; Bouché et al. 2012; Kacprzak et al. 2012).”
• The ESO UVES advanced data products quasar sample: II. Cosmological evolution of the neutral gas mass density (2013, background): “Outflows are ubiquitous in almost all distant star-forming galaxies (Weiner et al. 2009; Rubin et al. 2010; Steidel et al. 2010; Kacprzak et al. 2011; Bordoloi et al. 2011) and their rates arimilar to or higher than the SFR (e.g., Kornei et al. 2012).”
• EVIDENCE FOR WIDE-SPREAD ACTIVE GALACTIC NUCLEUS-DRIVEN OUTFLOWS IN THE MOST MASSIVE z ∼ 1–2 STAR-FORMING GALAXIES (2014, background): “…are motivated by recent observations of the dependence of Mg ii absorber occurrence and profiles as a function of inclination of the host galaxy (Bordoloi et al. 2011; Kacprzak et al. 2011, 2012; Bouché et al. 2012), as well as theoretical work on both energy and momentum driven outflows…”
• The Circumgalactic Medium (2017, methodology): “This method is commonly used in optical and near-UV lines such as Ca ii, Na i, Mg ii, and Fe ii (Martin 2005; Kornei et al. 2012; Bordoloi et al. 2011; Rubin et al. 2014) to study outflows from galaxies out to z ∼ 1, in UV lines for low-redshift star-forming galaxies (Henry et al. 2015; Heckman et…”
• THE COS-DWARFS SURVEY: THE CARBON RESERVOIR AROUND SUB-L* GALAXIES (2014, methodology): “In this study, akin to the COS-Halos survey, we adopt a “galaxy selected” approach (Bordoloi et al. 2011; Tumlinson et al. 2013).”
• GAS REGULATION OF GALAXIES: THE EVOLUTION OF THE COSMIC SPECIFIC STAR FORMATION RATE, THE METALLICITY–MASS–STAR-FORMATION RATE RELATION, AND THE STELLAR CONTENT OF HALOS (2013, background): “Observations of outflowing entrained MgII material both in the "down-the-barrel" spectra of star-forming galaxies and as seen against background galaxies at projected distances out to 40 kpc both imply a significant inverse dependence on mass (see Weiner et al 2005, Bordoloi et al 2011).”
• Cosmological Magnetic Fields: Their Generation, Evolution and Observation (2013, background): “The typical size of the MgII absorption systems is ∼ 100 kpc, which indicates that these systems are, most probably, bubbles around the star-forming galaxies produced by galactic winds (Bordoloi et al 2011).”
• DEMOGRAPHICS AND PHYSICAL PROPERTIES OF GAS OUTFLOWS/INFLOWS AT 0.4 < z < 1.4 (2012, background): “Bordoloi et al. (2011) mapped the Mg II absorption at impact parameters (to background galaxies) within 40 kpc of star-forming galaxies at 0.5 < z < 0.9.”