128 new Herbig stars

DOI

We present optical spectroscopy observations of 145 high-mass pre-main-sequence candidates from the catalog of Vioque et al. (2020, PhD thesis University of Leeds) From these, we provide evidence for the Herbig nature of 128 sources. This increases the number of known objects of the class by ~50%. We determine the stellar parameters of these sources using the spectra and Gaia EDR3 data. The new sources are well distributed in mass and age, with 23 sources between 4 and 8M_{sun} and 32 sources above 8M{sun}. Accretion rates are inferred from H{alpha} and H{beta} luminosities for 104 of the new Herbigs. These accretion rates, combined with previous similar estimates, allow us to analyze the accretion properties of Herbig stars using the largest sample ever considered. We provide further support to the existence of a break in accretion properties at ~3-4M{sun}, which was already reported for the previously known Herbig stars. We re-estimate the potential break in accretion properties to be at 3.87-0.96_^+0.38^M_{sun}. As observed for the previously known Herbig stars, the sample of new Herbig stars independently suggests intense inner-disk photoevaporation for sources with masses above ~7M{sun}_. These observations provide robust observational support to the accuracy of the Vioque et al. (2020, PhD thesis University of Leeds) catalog of Herbig candidates.

Cone search capability for table J/ApJ/930/39/tableb1 (Log of observations)

Identifier
DOI http://doi.org/10.26093/cds/vizier.19300039
Source https://dc.g-vo.org/rr/q/lp/custom/CDS.VizieR/J/ApJ/930/39
Related Identifier https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/930/39
Related Identifier http://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/930/39
Metadata Access http://dc.g-vo.org/rr/q/pmh/pubreg.xml?verb=GetRecord&metadataPrefix=oai_b2find&identifier=ivo://CDS.VizieR/J/ApJ/930/39
Provenance
Creator Vioque M.; Oudmaijer R.D.; Wichittanakom C.; Mendigutia I.; Baines D.,Panic O.; Iglesias D.; Miley J.; Perez-Martinez R.
Publisher CDS
Publication Year 2022
Rights https://cds.unistra.fr/vizier-org/licences_vizier.html
OpenAccess true
Contact CDS support team <cds-question(at)unistra.fr>
Representation
Resource Type Dataset; AstroObjects
Discipline Astrophysics and Astronomy; Interdisciplinary Astronomy; Natural Sciences; Observational Astronomy; Physics; Stellar Astronomy