Proplyds around a B1 star - 42 Orionis in NGC 1977

Abstract

We present the discovery of seven new proplyds (i.e. sources surrounded by cometary Halpha emission characteristic of offset ionization fronts) in NGC 1977, located about 30' north of the Orion Nebula Cluster at a distance of ~400 pc. Each of these proplyds are situated at projected distances 0.04-0.27 pc from the B1V star 42 Orionis (c Ori), which is the main source of UV photons in the region. In all cases the ionization fronts of the proplyds are clearly pointing toward the common ionizing source, 42 Ori, and 6 of the 7 proplyds clearly show tails pointing away from it. These are the first proplyds to be found around a B star, with previously known examples instead being located around O stars, including those in the Orion Nebula Cluster around ${\theta }^1$ Ori C. The radii of the offset ionization fronts in our proplyds are between ~200 and 550 AU; two objects also contain clearly resolved central sources that we associate with disks of radii 50-70 AU. The estimated strength of the FUV radiation field impinging on the proplyds is around 10-30 times less than that incident on the classic proplyds in the Orion Nebula Cluster. We show that the observed proplyd sizes are however consistent with recent models for FUV photoevaporation in relatively weak FUV radiation fields.

Accepted for publication in ApJ Letters

References in corpus (8)

• New evolutionary models for pre-main sequence and main sequence low-mass stars down to the hydrogen-burning limit
• The distance to the Orion Nebula
• ALMA Observations of the Orion Proplyds
• Correlation between the spatial distribution of the circumstellar disks and the massive stars in the open cluster NGC 6611. Compiled catalog and cluster parameters
• Correlation between the spatial distribution of circumstellar disks and massive stars in the young open cluster NGC 6611. II: Cluster members selected with Spitzer/IRAC
• Protoplanetary Disk Masses in the Young NGC 2024 Cluster
• Accretion and outflow in the proplyd-like objects near Cygnus OB2
• Probing X-ray photoevaporative winds through their interaction with ionising radiation in cluster environments: the case for X-ray proplyds

Cited by in corpus (35)

• Expanding bubbles in Orion A: [CII] observations of M42, M43, and NGC 1977
• The first multi-dimensional view of mass loss from externally FUV irradiated protoplanetary discs
• The evolution of protoplanetary discs in star formation and feedback simulations
• Proplyds in the Flame Nebula NGC 2024
• Gaia Stellar Kinematics in the Head of the Orion A Cloud: Runaway Stellar Groups and Gravitational Infall
• Planet formation via pebble accretion in externally photoevaporating discs
• Photochemical-dynamical models of externally FUV irradiated protoplanetary discs
• The growth and migration of massive planets under the influence of external photoevaporation
• Massive star feedback in clusters: variation of the FUV interstellar radiation field in time and space
• The influence of the environment on the spin evolution of low-mass stars. I. External photoevaporation of circumstellar disks
• Testing external photoevaporation in the $\sigma$-Orionis cluster with spectroscopy and disk mass measurements
• External photoevaporation of protoplanetary discs in Cygnus OB2: linking discs to star formation dynamical history
• Warm millimetre dust in protoplanetary discs near massive stars
• Dust delivery and entrainment in photoevaporative winds
• The Observational Anatomy of Externally Photoevaporating Planet-Forming Discs I: Atomic Carbon
• Testing viscous disc theory using the balance between stellar accretion and external photoevaporation of protoplanetary discs
• Dispersal timescale of protoplanetary disks in the low-metallicity young cluster Dolidze 25
• Evolution of circumstellar discs in young star-forming regions
• [OI] 6300Å emission as a probe of external photoevaporation of protoplanetary discs
• Chemical modeling of Orion Nebula Cluster disks: evidence for massive, compact gas disks with ISM-like gas-to-dust ratios
• A Novel Method to Estimate the FUV Flux and a Catalogue for Star-Hosting Discs in Nearby Star-Forming Regions
• Deep diving off the `Cosmic Cliffs': previously hidden outflows in NGC 3324 revealed by JWST
• A candidate planetary-mass object with a photoevaporating disk in Orion
• Subaru Hyper Suprime-Cam Survey of Cygnus OB2 Complex -- I: Introduction, Photometry and Source Catalog
• A New Look at Disk Winds and External Photoevaporation in the $\sigma$-Orionis Cluster
• An APEX search for carbon emission from NGC 1977 proplyds
• Young Stars near Cometary Globule CG 30 in the Tumultuous Gum Nebula
• A slim disc approach to external photoevaporation of discs
• The Kelvin-Helmholtz instability in the Orion nebula: The effect of radiation pressure
• Radio observations of evaporating objects in the Cygnus OB2 region
• An upper limit for the growth of inner planets?
• Using simultaneous mass accretion and external photoevaporation rates for d203-504 to constrain disc evolution processes
• Line ratio identification of external photoevaporation
• Dispersal of protoplanetary discs: How stellar properties and the local environment determine the pathway of evolution
• Star Forming Regions