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A Population of Heavily Reddened, Optically Missed Novae from Palomar Gattini-IR: Constraints on the Galactic Nova Rate
De,Kishalay1; Kasliwal,Mansi M.1; Hankins,Matthew J.2; Sokoloski,Jennifer L.3; Adams,Scott M.1; Ashley,Michael C. B.4; Babul,Aliya-Nur5; Bagdasaryan,Ashot1; Delacroix,Alexandre6; Dekany,Richard6; Greffe,Timothée6; Hale,David6; Jencson,Jacob E.1,7; Karambelkar,Viraj R.1; Lau,Ryan M.8; Mahabal,Ashish1; McKenna,Daniel6; Moore,Anna M.9; Ofek,Eran O.10; Sharma,Manasi11; Smith,Roger M.6; Soon,Jamie9; Soria,Roberto12; Srinivasaragavan,Gokul1; Tinyanont,Samaporn13; Travouillon,Tony9; Tzanidakis,Anastasios1; Yao,Yuhan1
2021-04-30
Source PublicationThe Astrophysical Journal
ISSN0004-637X
Volume912Issue:1
AbstractAbstract The nova rate in the Milky Way remains largely uncertain, despite its vital importance in constraining models of Galactic chemical evolution as well as understanding progenitor channels for Type Ia supernovae. The rate has been previously estimated to be in the range of ≈10–300 yr?1, either based on extrapolations from a handful of very bright optical novae or the nova rates in nearby galaxies; both methods are subject to debatable assumptions. The total discovery rate of optical novae remains much smaller (≈5–10 yr?1) than these estimates, even with the advent of all-sky optical time-domain surveys. Here, we present a systematic sample of 12 spectroscopically confirmed Galactic novae detected in the first 17 months of Palomar Gattini-IR (PGIR), a wide-field near-infrared time-domain survey. Operating in the J band (≈1.2 μm), which is significantly less affected by dust extinction compared to optical bands, the extinction distribution of the PGIR sample is highly skewed to a large extinction values (>50% of events obscured by AV ? 5 mag). Using recent estimates for the distribution of Galactic mass and dust, we show that the extinction distribution of the PGIR sample is commensurate with dust models. The PGIR extinction distribution is inconsistent with that reported in previous optical searches (null-hypothesis probability <0.01%), suggesting that a large population of highly obscured novae have been systematically missed in previous optical searches. We perform the first quantitative simulation of a 3π time-domain survey to estimate the Galactic nova rate using PGIR, and derive a rate of ≈ 43.7 ? 8.7 + 19.5 yr?1. Our results suggest that all-sky near-infrared time-domain surveys are well poised to uncover the Galactic nova population.
KeywordClassical novae Novae Cataclysmic variable stars White dwarf stars Interstellar dust extinction
DOI10.3847/1538-4357/abeb75
Language英语
WOS IDIOP:0004-637X-912-1-abeb75
PublisherThe American Astronomical Society
Citation statistics
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/58240
Collection中国科学院国家天文台
Corresponding AuthorDe,Kishalay
Affiliation1.Cahill Center for Astrophysics, California Institute of Technology, 1200 E. California Boulevard, Pasadena, CA 91125, USA; kde@astro.caltech.edu
2.Arkansas Tech University, Russellville, AR 72801, USA
3.Columbia Astrophysics Laboratory, Columbia University, 550 West 120th Street, New York, NY 10027, USA
4.School of Physics, University of New South Wales, Sydney, NSW 2052, Australia
5.Department of Astronomy, Columbia University, 550 West 120th Street, New York, NY 10027, USA
6.Caltech Optical Observatories, California Institute of Technology, Pasadena, CA 91125, USA
7.Steward Observatory, University of Arizona, 933 North Cherry Avenue, Tucson, AZ85721-0065, USA
8.Institute of Space & Astronautical Science, Japan Aerospace Exploration Agency, 3-1-1 Yoshinodai, Chuo-ku, Sagamihara, Kanagawa 252–5210, Japan
9.Research School of Astronomy and Astrophysics, Australian National University, Canberra, ACT 2611, Australia
10.Department of Particle Physics & Astrophysics, Weizmann Institute of Science, Rehovot 76100, Israel
11.Department of Physics, Pupin Hall, Columbia University, New York, NY 10027, USA
12.National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, People’s Republic of China
13.University of California, Santa Cruz, 1156 High Street, Santa Cruz, CA 95064, USA
Recommended Citation
GB/T 7714
De,Kishalay,Kasliwal,Mansi M.,Hankins,Matthew J.,et al. A Population of Heavily Reddened, Optically Missed Novae from Palomar Gattini-IR: Constraints on the Galactic Nova Rate[J]. The Astrophysical Journal,2021,912(1).
APA De,Kishalay.,Kasliwal,Mansi M..,Hankins,Matthew J..,Sokoloski,Jennifer L..,Adams,Scott M..,...&Yao,Yuhan.(2021).A Population of Heavily Reddened, Optically Missed Novae from Palomar Gattini-IR: Constraints on the Galactic Nova Rate.The Astrophysical Journal,912(1).
MLA De,Kishalay,et al."A Population of Heavily Reddened, Optically Missed Novae from Palomar Gattini-IR: Constraints on the Galactic Nova Rate".The Astrophysical Journal 912.1(2021).
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