VizieR Online Data Catalog: Star formation in Milky Way analogues (Fraser-McKelvie+, 2019)
Abstract
To create a sample of Milky Way Analogues (MWAs), we team a tight constraint on stellar mass with three structural parameters that are well-determined for the Milky Way: the presence of spiral arms, a bar, and a small bulge. Only a galaxy satisfying all four criteria will be termed an MWA. The parent sample is the Sloan Digital Sky Survey Data Release 7 (SDSS DR7; Abazajian et al. 2009ApJS..182..543A, Cat. II/294).
For the spiral and bar classifications, we used the Galaxy Zoo 2 (GZ2; Willett et al. 2013MNRAS.435.2835W, J/MNRAS/435/2835) citizen science project. For the spiral arms, we imposed the spiral weighted fraction to be >0.7. For the bar, we selected the galaxies having a bar weighted fraction >0.5. Then, we adopted bulge-to-total ratio (BTR) from Simrad et al. (2011ApJS..196...11S, Cat. J/ApJS/196/11) and selected galaxies with 0.1<BTR<0.2. Finally, we employed the NASA-Sloan Atlas (NSA) catalogue (Blanton et al. 2011AJ....142...31B) masses derived from elliptical Petrosian photometry and keeped only the galaxies having 4.1x1010Mȯ<M<8.0x1010Mȯ_. By incorporating the extremely strict structural criteria listed above, we end up with a well-defined sample of 176 galaxies in SDSS DR7. We take a multiwavelength approach to calculating SFRs of the MWAs, using both UV/Optical/mid-IR spectral energy distributions (SEDs), and as a cross-check, a mid-infrared (IR) indicator calibrated to total-IR luminosity. Given these SFR indicators employ contrasting techniques, and overlapping but not identical wavelength ranges, they are complementary to one another. We list all MWAs in the sample, along with their SFRs, in Table 1. (1 data file).- Publication:
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VizieR Online Data Catalog
- Pub Date:
- January 2023
- Bibcode:
- 2023yCat..74895030F
- Keywords:
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- Galaxies: photometry;
- Galaxies: spectra;
- Milky Way;
- Optical;
- Infrared