Distance and mass of the NGC 253 galaxy group

Abstract

Two dwarf galaxies: WOC2017-07 and PGC 704814 located in the vicinity of the nearby luminous spiral galaxy NGC 253 were observed with the Advanced Camera for Surveys on the Hubble Space Telescope. Their distances of 3.62$\pm$0.18 Mpc and 3.66$\pm$0.18 Mpc were derived using the tip of the red giant branch method. These distances are consistent with the dwarf galaxies being members of the NGC 253 group. Based on the radial velocities and projected separations of seven assumed dwarf companions, we estimated the total mass of NGC 253 to be $(8.1\pm 2.6)10^{11}{M}_{\odot }$, giving a total-mass-to-$K$-luminosity ratio $M_{\mathrm{orb}}/L_K=(8.5\pm 2.7)M_{\odot }/L_{\odot }$. A notable property of NGC 253 is its declined rotation curve. NGC 253 joins four other luminous spiral galaxies in the Local Volume with declined rotation curves (NGC 2683, NGC 2903, NGC 3521 and NGC 5055) that together have the low average total-mass-to-luminosity ratio, $M_{\mathrm{orb}}/L_K=(5.5\pm 1.1)M_{\odot }/L_{\odot }$. This value is only $\sim$1/5 of the corresponding ratio for the Milky Way and M 31.

8 pages, 3 figures, 2 tables. Accepted to ApJ

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Cited by in corpus (11)

• The Extragalactic Distance Database: The Color-Magnitude Diagrams and Tip of the Red Giant Branch Distances Catalog
• Tracing satellite planes in the Sculptor group: I. Discovery of three faint dwarf galaxies around NGC 253
• Tracing the Local Volume galaxy halo-to-stellar mass ratio with satellite kinematics
• Around the Spindle galaxy: the dark halo mass of NGC3115
• Distances to 10 nearby galaxies observed with the Hubble space telescope
• On the thermal structure of the proto-Super Star Cluster 13 in NGC 253
• The Radio Spectral Energy Distribution and Star Formation Calibration in MIGHTEE-COSMOS Highly Star-Forming Galaxies at 1.5 < z < 3.5
• Physical Conditions of the Ionized Superwind in NGC 253 with VLT/MUSE
• Searching for Pulsars, Magnetars, and Fast Radio Bursts in the Sculptor Galaxy using MeerKAT
• Tracing satellite planes in the Sculptor group: II. Discovery of five faint dwarf galaxies in the DESI Legacy Survey
• On the origin of the anomalous gas, non-declining rotation curve and disc asymmetries in NGC253