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The EDGE-CALIFA Survey: Molecular Gas and Star Formation Activity across the Green Valley

  • Authors: Vicente Villanueva, Alberto D. Bolatto, Stuart N. Vogel, Tony Wong, Adam K. Leroy, Sebastian F. Sánchez, Rebecca C. Levy, Erik Rosolowsky, Dario Colombo, Veselina Kalinova, Serena Cronin, Peter Teuben, Mónica Rubio, Zein Bazzi

Vicente Villanueva et al 2024 The Astrophysical Journal 962 .

  • Provider: AAS Journals

Caption: Figure 6.

Stellar (Σ; red solid line) and molecular gas (Σmol; blue solid line) surface densities, in units of M pc−2, as a function of galactocentric radius, in units of the stellar effective radius (R e), for the 30 ACA EDGE galaxies with 5σ CO detections and inclinations i ≤ 70°. The blue shaded area is the ±1σ uncertainty. The brown dotted line is the SFR surface density, ΣSFR. The gray shaded area is the region within the bulge radius, R bulge. Dashed black lines correspond to the best exponential function fit for stellar and molecular gas radial profiles, from top to bottom. The dashed–dotted green line corresponds to r = r 25. The code in the bottom left corner corresponds to the Hubble type and the nuclear activity (columns (5) and (6) in Table 2, respectively). SFRs at r < 0.5R e have been removed for LINER and AGN galaxies, since Hα in this region is susceptible to LINER/AGN contamination (see Section 4.2.2). Galaxies are classified based on their ΔSFMS as defined in Section 4.1, i.e., in the main sequence (blue panels), green valley (green panels), and red cloud (red panels). When using stellar profiles as a benchmark, we note a systematic flattening of the molecular gas profiles with ΔSFMS. See also Figure 12.

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