Water and OH Emission from the inner disk of a Herbig Ae/Be star

Abstract

We report the detection of hot H${}_2$O and OH emission from the Herbig Ae/Be star HD$101412$ using the Cryogenic Infrared Echelle Spectrograph on the $\text{Very Large Telescope}$. Previous studies of Herbig Ae/Be stars have shown the presence of OH around some of these sources, but H${}_2$O has proven more elusive. While marginal water emission has been reported in the mid-infrared, and a few Herbig Ae/Be stars show water emission in the far-infrared, water emission near 2.9 $\mu$m has not been previously detected. We apply slab models to the ro-vibrational OH, H${}_2$O, and CO spectra of this source and show that the molecules are consistent with being cospatial. We discuss the possibility that the detection of the CO overtone bandhead emission, detection of water emission, and the large line to continuum contrast of the OH lines may be connected to its high inclination and the $\lambda$ Boö nature of this star. If the low abundance of refractories results from the selective accretion of gas relative to dust, the inner disk of HD$101412$ should be strongly dust-depleted allowing us to probe deeper columns of molecular gas in the disk, enhancing its molecular emission. Our detection of C- and O-bearing molecules from the inner disk of HD$101412$ is consistent with the expected presence in this scenario of abundant volatiles in the accreting gas.

arXiv commentAccepted for publication in the Astrophysical Journal, 12 pages, 12 figures, 4 tables

References in corpus (41)

• Gaia Data Release 2. Summary of the contents and survey properties
• Gaia Data Release 1. Summary of the astrometric, photometric, and survey properties
• The VizieR database of Astronomical Catalogues
• Dust Filtration by Planet-Induced Gap Edges: Implications for Transitional Disks
• Dust filtration at gap edges: Implications for the spectral energy distributions of discs with embedded planets
• Astrometry of Water Maser Sources in Nearby Molecular Clouds with VERA - II. SVS 13 in NGC 1333
• H2O and OH gas in the terrestrial planet-forming zones of protoplanetary disks
• A Spitzer survey of mid-infrared molecular emission from protoplanetary disks I: Detection rates
• A spectroscopic survey of Herbig Ae/Be stars with X-Shooter I: Stellar parameters and accretion rates
• A Spitzer Survey of Mid-Infrared Molecular Emission from Protoplanetary Disks II: Correlations and LTE Models
• The molecular composition of the planet-forming regions of protoplanetary disks across the luminosity regime
• Warm Gas in the Inner Disks around Young Intermediate Mass Stars
• Hot H2O Emission and Evidence for Turbulence in the Disk of a Young Star
• Kinematic Diagnostics of Disks Around Young Stars: CO Overtone Emission from WL16 and 1548C27
• VLT-CRIRES Survey of Rovibrational CO Emission from Protoplanetary Disks
• CO rovibrational emission as a probe of inner disk structure
• DIGIT survey of far-infrared lines from protoplanetary disks I
• Fingerprints of giant planets in the photospheres of Herbig stars
• Chemical abundances of magnetic and non-magnetic Herbig Ae/Be stars
• The structure of the protoplanetary disk surrounding three young intermediate mass stars. II. Spatially resolved dust and gas distribution
• HD 98800: A 10-Myr-Old Transition Disk
• An empirical sequence of disk gap opening revealed by rovibrational CO
• The depletion of water during dispersal of planet-forming disk regions
• Water depletion in the disk atmosphere of Herbig AeBe stars
• First Detection of Near-Infrared Line Emission from Organics in Young Circumstellar Disks
• Investigating the inner discs of Herbig Ae/Be stars with CO bandhead and Br Gamma emission
• A spectroscopic survey of Herbig Ae/Be stars with X-Shooter II: Accretion diagnostic lines
• The structure of disks around Herbig Ae/Be stars as traced by CO ro-vibrational emission
• IRAM-PdBI Observations of Binary Protostars I: The Hierarchical System SVS13 in NGC1333
• The Structure of Protoplanetary Disks Surrounding Three Young Intermediate Mass Stars. I. Resolving the disk rotation in the [OI] 6300 Åline
• Discovery of OH in Circumstellar Disks Around Young Intermediate-Mass Stars
• Warm H2O and OH in the disk around the Herbig star HD 163296
• Detection of steam in the circumstellar disk around a massive Young Stellar Object
• Shielding by Water and OH in FUV and X-ray Irradiated Protoplanetary Disks
• The exceptional Herbig Ae star HD101412: The first detection of resolved magnetically split lines and the presence of chemical spots in a Herbig star
• Warm H2O and OH disk emission in V1331 Cyg
• FUV Irradiated Disk Atmospheres: Ly$\alpha$ and the Origin of Hot H${}_2$ Emission
• Facing the wind of the pre-FUor V1331 Cyg
• FUV Irradiation and the Heat Signature of Accretion in Protoplanetary Disk Atmospheres
• The narrow, inner CO ring around the magnetic Herbig Ae star, HD 101412
• A Study of Ro-vibrational OH Emission from Herbig Ae/Be Stars

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