A novel survey for young substellar objects with the W-band filter III: Searching for very low-mass brown dwarfs in Serpens South and Serpens Core

Sophie Dubber, Beth Biller, Katelyn Allers, Jessy Jose, Loïc Albert, Blake Pantoja, Clémence Fontanive, Michael Liu, Zhoujian Zhang, Wen Ping Chen, Bhavana Lalchand, Belinda Damian, Tanvi Sharma

Research output: Contribution to journalReview articlepeer-review

5 Scopus citations

Abstract

We present CFHT photometry and IRTF spectroscopy of low-mass candidate members of Serpens South and Serpens Core (∼430 pc, ∼0.5 Myr), identified using a novel combination of photometric filters, known as the W-band method. We report SC182952+011618, SS182959-020335, and SS183032-021028 as young, low-mass Serpens candidate members, with spectral types in the range M7-M8, M5-L0, and M5-M6.5, respectively. Best-fitting effective temperatures and luminosities imply masses of < 0.12M⊙ for all three candidate cluster members. We also present Hubble Space Telescope imaging data (F127M, F139M, and F850LP) for six targets in Serpens South. We report the discovery of the binary system SS183044-020918AB. The binary components are separated by ≈45 AU, with spectral types of M7-M8 and M8-M9, and masses of 0.08-0.1 and 0.05-0.07 M. We discuss the effects of high dust attenuation on the reliability of our analysis, as well as the presence of reddened background stars in our photometric sample.

Original languageEnglish
Pages (from-to)4215-4234
Number of pages20
JournalMonthly Notices of the Royal Astronomical Society
Volume505
Issue number3
DOIs
StatePublished - 1 Aug 2021

Keywords

  • binaries: general
  • brown dwarfs
  • stars: low-mass

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