On the origin of the absorption and emission line components in the spectra of PHL 293B

Abstract

From the structure of PHL 293B and the physical properties of its ionizing cluster and based on results of hydrodynamic models, we point at the various events required to explain in detail the emission and absorption components seen in its optical spectrum. We ascribe the narrow and well centered emission lines, showing the low metallicity of the galaxy, to an HII region that spans through the main body of the galaxy. The broad emission line components are due to two off-centered supernova remnants evolving within the ionizing cluster volume and the absorption line profiles are due to a stationary cluster wind able to recombine at a close distance from the cluster surface, as originally suggested by Silich et al. (2004). Our numerical models and analytical estimates confirm the ionized and neutral column density values and the inferred X-ray emission derived from the observations.

13 pages, 2 figures, accepted for publication in the Astrophysical Journal

References in corpus (5)

• The Baryon Content of Extremely Low Mass Dwarf Galaxies
• The primordial abundance of 4He: a self-consistent empirical analysis of systematic effects in a large sample of low-metallicity HII regions
• On the hydrodynamics of the matter reinserted within superstellar clusters
• On the Onset of Secondary Stellar Generations in Giant Star Forming Regions and Massive Star Clusters
• High velocity blue-shifted FeII absorption in the dwarf star-forming galaxy PHL293B: Evidence for a wind driven supershell?

Cited by in corpus (8)

• The Curious Case of PHL 293B: A Long-Lived Transient in a Metal-Poor Blue Compact Dwarf Galaxy
• Pyroclastic Blowout: Dust Survival in Isolated versus Clustered Supernovae
• X-ray emission from star cluster winds in starburst galaxies
• Mapping the ionized gas of the metal-poor HII galaxy PHL 293B with MEGARA
• Infrared Observational Manifestations of Young Dusty Super Star Clusters
• Can Dust Injected by SNe Explain the NIR-MIR Excess in Young Massive Stellar Clusters?
• Decade-long time-monitoring of candidate Luminous Blue Variable Stars in the two very metal-deficient compact dwarf galaxies DDO 68 and PHL 293B
• The bright, dusty aftermath of giant eruptions & H-rich supernovae. Late interaction of supernova shocks & dusty circumstellar shells